US 2609768 A
Description (OCR text may contain errors)
. inventor JAMA'S ARNOLD CASH C(ttmmeg 8 Sheet S-Sheet 1 JAMES ARADLD CASH JR- .J A CASH ET AL EDGE ROLL FORMING AND SEWING, MACHINE Sept. 9, l9 52 Filed Nqv. 17, 1947 Sept. 9', 1952- Filed Nov. 1'7, 1947 v J. A. CASH ETAL EDGE ROLL. FORMING AND SEWING MACHINE 8 SheetsSheet 2 Snventor JAAa-s ARNOLD CASH JAMES ARNOLD CASH an.
attorney Sept. 9 ,-1952 J. A. CASH ETAL EDGE ROLL FORMING AND SEWING MACHINE Filed Nov, 17. 1947 8 Sheets-Sheet 5 Snventor g JAMES ARNOLD CASH AND JAMES ARNOLD CASH JR.
' (lttorneg Sept. 9, 1952 J. A. CASH ET AL EDGE ROLL. FORMING AND SEWING MACHINE 8Sheets-Sheet 4 Filed Nov. 17. 1947 Enventor JAMES ARNOLD CASH JAMES ARNOLD CASH 11R (Ittomeg Sept. 9, 1952 J. A. CASH ET AL 7 2,609,768
EDGE ROLL FORMING AND SEWING MACHINE Filed Nov. 17. 1947 8 Sheets-Sheet s nun ozmm 0:
MOVEMENT CONTINUED naw/w MOVEMENT /.50"
NOAMAL PLANE or earn/0N or CAM PLATE Snnentor JAME ARNOLD 045;! JAMES ARNOLD CASH J2- (Ittomeg Sept. 9, 1952 J. A. CASH ETAL EDGE ROLL FORMING "AND SEWING MACHINE 8 Sheets-Sheet 6 Filed Nov. 17, 1947 INVENTOR. JAM" Mvow c4511 mvn JAMzs ARNOLD c4551 11:. BY
ATTORNEY 8 Sheets- Sheet 7 J. A. CASH ETAL EDGE ROLL FORMING AND SEWING MACHINE Sept. 9, 1952 Filed Nov. 17 1947 I 7 INVENTOR. JAMES ARNOLD CASH AND JAMES ALA OLD C4511 J2.
ATTORNEY Sept. 9, 1952 J. A. CASH ETAL EDGE ROLL FORMING AND sswmc; MACHINE 8 Sheets-Sheet 8 Filed NOV. 17. 1947 INVENTOR.
ms mow c4551 Aw /AMA! AIM/OLD any in.
ATTORNEY Patented Sept. 9 1952 UNITED STATES PATENT OFFICE:
EDGE ROLL SEWIN James A. Cash, Louisville, and James A; Cash,- J r-., Jefferson flounty, Ky., assignors to-J'ames Gash Machine-'00:, Louisville, Kyr, aicorporatio-n of Kentucky RPHQM N m 17, 94 Sexis No! 7853 55!" 331:0,laims;
This invention relates to sewing machinesyand relates in particular to machines-tor forming an edge roll on a mattress or the"like-and'for seiv ingthe roll on-the mattress;
Stuffed mattresses consist of an outep cgvera ing or ticking fi-l'ledwi-tlr loosefibrousmaterial, such as cotton fibers, or the like, and it-is-u'sual togather the ticking and filling materi'al into' a roll along the edgesand'sew therollalong the base topreservethe-shapeof the mattress.- The present invention relates to amachine forautomatically gathering the-ticking and filling-' material into aroll at the edge and sewing-the-roll, although it willbe understood that the invention may be employed for: operating on other articles in a similar manner.
It is an obj ect-of the present invention to provide a combination roll former and stitcherwhich maybeoperatedat a faster ratethan heretofore.
A further object is the provision of acombination roll former, and stitcher-of simplified construction; whereby the costo-f'manufacture is reduced.
A further object is the provisionof a combination rollformer and stitcher-which'is positively guided tomaintain a substantially tangential relation in traveling around acurve.
Another object is the provision of animproved roll forming movement which is or simplified oon l struction.
In accordance with the present invention, there is provided a carriage-for-roll former and sti'tcher mechanisms; which carriage can bee-operated to continuously advance along the article to be operated on for successive rollforming' and sewing operations, and on whicht-he sewing needleand rolllformcr are mounted to be moved .retrogradely relative theretowhile they are in contact with they article, and to be periodically advanced to overtake and assume'their starting position in the, carriage for the next successive operation. This arrangement and construction avoids the repetitive starting and stopping ofthe, carriage, as heretofore done in prior constructions, and enablesthe rate ofsewing tobe increased, partly because the periods of carriage acceleration and deceleration present; in the start-and stop mechanisms of prior constructions are eliminated.
Furthermore, this arrangement enables the simplification of the mechanism. for exampleby mounting the sewing needle and roll former one single vibrating, mount, these elements may be moved retrogradely in unison,and thus only one retrograde actuating mechanism can serve-to actuate both elements. Eur-then simplification of 'themechanism is obtained-s by: mounti-ngthe needlefor reotilinear sewmg move...
ment on the vibrating -mou=nt and actuating thez 5 also ma-ybe universally connected by motion transmitting links to a mot-ion-varying cami The-advancing and-retrograde vibration ef' the mount for-the needleandrolliormermay be complished in any suitable manner. We prefer toemploy for this purpose a cam which is bodilv continuously advanced "with the. carriage anon-1s.
rotated in synchronism with the advancing move-M men-"t; the cam providing-a surface inclinedlf-rom the normal. This cam surface provides-a gradua ally advancing 'zone anda steep retrograde zone to alternately-move the mount backward and fora ward respectively. a follower which en gages the camand operates "the vibratingmount carrying th sewing and roll forming mocha will move retrogr-adely when contact with the advancing zone of-"thecam; and' wtil'l advance rapidly when in contact with a the steep the sewing needle during the retrograde phase or the'oscillation when there is no relative movement between the article acted on andthe I'OHfQllIliDg;
or" sewing mechanisms; By providing a quick-v advancing or overtaking A movement, more than half the time'between successive stitches car-i be devoted to the roll forming and s-ewingoperationsr It ispreferred to employ a gripper mechanism in conjunction with the sewing mechanism or roll" forming -mechanism to prevent the artiele be'ingoperated on from being displaced bythe advanc ing movement or the carriage. This mechanisin is-preferably" in the form of a pair of separable gripper jaws or the like which are timedto-g'rip the article and move retrogradely *duringf-the period of overtaking movement of the mount'; and which are released and advanced a t any suitable time thereafter in readiness for the next grippingoperation. The back and iorth vibration of the gripper, which is out oPphase-withthe vibration of themount, can beobtained-"by a follower engaging the cam in ma agemention to the follower for thev-ibrating-mount; and
the gripping and releasing action of the grippers may be timed by a suitable cam surface and follower on the same cam member. If desired, the sewing mechanism may be employed without the roll forming mechanism or any suitable roll forming mechanism may be employed therewith.
The invention further contemplates the provision of an improved and simplified roll forming mechanism which is'readily secured to the mount.
This mechanism preferably comprises a pivoted linkage having a roll forming element, such as a packing needle, the mechanism having provision for advancing the roll forming element by a substantially lineal movement into the article and for changing the angular relation of the links to turn the roll forming element in the article with are provided to cooperate with the cam track toshift the respective pivots of the roll former movement.
. The carriage and mechanism are advanced by a motor which is suitably connected to rotate the cam member in synchronism with the advancing movement of the mechanism. The carriage is advanced by the engagement of a gear on a rack, and the guiding structure for the carriage includes a triangular roller or shoe arrangement engaging parallel guide surfaces along the edge to be sewed and to which the rack may be secured. In turning a corner one of the rollers or shoes acts as a pivot, and the rack is curved about said pivot as a center. The other two rollers, which may be designated as base rollers, are the base of the triangle. The turning radius of the base rollers is the distance between centers of the pivot roller and one of the base rollers, and in turning a corner the base becomes a chord of the turning are at the corner, the corner of the outer guide surface being cut oil to provide turning clearance. By having the sewing needle and roll former aligned parallel to said triangle base, the tangential or normal relation thereof to the radius of curvature is preserved in going around corners.
;The invention also includes provision for supporting a mattress to be operated on, with means for raising or lowering the support to accommodate different thicknesses of mattresses, and provision for changing the sewing angle at the edge of the mattress.
g The invention embodies various other features,
all of which will be described in greater detail in connection with theaccompanying drawing, wherein is shown preferred embodiments of the invention by way of example, and wherein:
- Figure 1 is a perspective view of the entire invention,
Figure 2 is a fragmentaryside view showing the advancing and guiding arrangement, 7
Figure 3 is a view similar to Figure 2 with additional parts removed,
Figure l is a view of the traveling carriage as seen from the right in Figure 1, and with parts of the housing broken away,
Figure 5 is a detail of the guiding roller as seen from the right in Figure 2,
Figure 6 is an enlarged view of the upper por--- tion of the carriage as seen in Figure 4 with the cowl removed to show the interior,
Figure 7 is a side view of Figure 6 as viewed from the left and showing the parts in corresponding position,
Figure 8v is a side view similar to Figure 7 with the shuttle broken away and the parts in an advanced position,
Figure 9 is a view of Figure 8 asseen from the right and including the shuttle,
Figure 10 is an enlarged side view of a fragment as seen in Figure l, and showing the cowl and roll shaper,
.Figure 11 is a partly diagrammatic view of the cam member as seen in Figure 7,
Figure 12 is a diagrammatic end view of the cam showing how the advance and retrograde movement is produced,
Figure 13 is a perspective view of the bobbin housing,
Figure 14 is an enlarged view of the packing needle and shank,
Figure 15 is a diagrammatic view illustrating the operation of the guide in turning a corner,
Figure 16 is a perspective view of the roll shaper bar,
Figure 17 is a perspective view of the vibrating mounting bar stripped of attachments,
Figure 18 is a side view of the vibrating mounting bar carrying the roll forming movement.
Figure 19 is a side view of the gripper arm as viewed in Figure '7,
Figure 20 is a fragmentary view of certain details of the gripper bar asviewed from the opposite side of Figure 19,
Figure 21 is a side View showing the mounting of the carriage head on the carriage,
Figure 22 is a sectional view taken on line 22-22 of Figure 21, and showing the cam plate in section,
Figure 23 is a side view of a modified roll former, a cam therefor being diagrammatically shown,
Figure 24 is a side view of a further modification of the roll former.
Figure 25 is a view of a part of Figure 24 showing the roll former in an advanced phase of movement,
Figure 26 is a view similar to Figure 25 showing the roll former in a further advanced phase, and
Figure 27 is a diagrammatic view of the cam operation for the modification of Figure 24.
Work elevating adjustment Referring to the drawing, Figure 1, there is shown a table or platform I adapted to receive a mattress to be stitched, and having angle brackets 2 depending therefrom which have threaded nuts secured to the bottom that receive the threaded posts 3. The lower ends of the posts are suitably rotatably journalled in socket 'or hearing members'4 carried by a stationary base or support indicated generally at 5, and sprockets 6 are secured to the posts near the bearings. An endless chain 1 passes over the sprockets 6 and over a drive sprocket (not shown) driven by suitable reduction gearing from a reversible electric motor 8, so that upon operation of the motor the threaded posts 3 are rotated in threaded brackets 2 to raise or lower the platform. A suitable manually controlled switch (not shown) is'provided to operate motor 8.
ncomes undersurface of which is secured an endless toothed rack l2. A bracket 1.3 (Fig.4) carried by the traveling carriage 14 has bosses. l and. I6 which receive thehexagon head spindles 1.1 and I8, on which are journalled on suitable ball bearings, the surface contacting means in the form of spaced rollers 19 and 2 I respectively, adapted toengagetheoutside face 22 (Figs. 1 to 3) of the rail H. A slotted arm 23 (Figs. '2 -and 5) "adjustablysecured to bracket 13 by'a bolt 24'pa'ssed through the slot, carries aspindle 25 which receives a surface contactingmeans in the form ofa roller 26 I also suitably journalled on ball bearings. Roller-*2-6 engages the insideeface-fl of the rail ll. 7 The engagement of rollers I9, 2 l and ZB-With the opposite: faces of the rail H holds the spur gear 28,which isrotatably journalled in the stitcher carriage H, in engagement with the tooth rack 12, so that: when the spur gear 28 is rotated the stitcher is caused to travel along the rail li'around theplatform l. The effective length of arm 23' may beac'curately ad justed by rotation of the setscrews 29which pass through the cross bar 380i the armand are threaded into holes 3| in the bracket f3. An arcuate cam 32 (Figs. 1 and 15) is carried at'each corner-of therail H, the purpose-of whichwill be later explained.
Arms 33 andfl'34 are swivelled on spindles 35 and 36 between extensions 31 and 38 of the bracket l3. The arms rotatably carry at their ends the shanks 39 of clevices '48 that' receive the rotatable grooved casters. A steadying rail 42' (Figs.'1' to3) in the form of a circular'rod' or'tube is suitably secured, as by welding, on the upper face of'rail. l I, and thegrooved casters 4| straddle the rail 42. At the bottom the base 5 carries a guide rail 43"(Fig.'1')' and a roller 44 journalled on a vertical spindle on the carriage, engages the guiderail 43'. Theguiderail 43 is curved at the corners. The casters serve to supportor suspend the traveling stitcher carriage on the rail H, while the rollers I9, and 26. engaging'jrail H, and roller engaging rail 43;hold the carriage steady in its travel'around' the rail. Thetubularform of'rail'42'allows the casters to travel around the bends at the. cornerslwithout climbing up upon the rail.
Carriage advancing mechanism A motor 45' (Fig. 4) 'iscarried in the base housing ofthe stitcher carriage l4, and is connected by a-drive 46 comprising a belt and pulleys, to drive the reduction gear box 41;
of a lever54 secured on shaft 5l,.the collar 50. maybe manually disengaged from .gear 28, thus allowing gear 28 to: rotate freely on: shaft 48. When gear 28 is rotated by-mo'tor 45,:itsaengagement with'the'toothed rack 12 causes the stitcher assembly to continuously 'travel or advance aroundfthe rail' 'l I. By disengaging collar= fromge'ar- 28; the gear isvfree to rotate: and; the.
Gear 28'is rotatably journalled on-the reduced end of shaft 98, 98', and the'rollers move in the cam. groove;
stitchernmay-zbe manually lpushednalongfithe rafl' I II to-any desired'i location;and r upomre eiigagement of clutchtcollar '58, the gean is-locked to themotor to be driven thereby. 'The motor'li isi controlled *by: a 6 suitable i manually operated switch: 55" secured: to the. side oil the-assembly; which preferably is of the: type normally biased to open position, and closed by manualoperation. If desired, 1 any other suitable means may be providedvtc' advance: the stitcher assembly:
The traveling carriage l4 carries an edgeroll' forming mechanism and a sewing mechanism which vibrate laterally at a suitable frequency and speed so as to enable thewhole carriage to continue to advancelduring the' time ei'ther the sewing needle, or roll forming'mechanismjor both are in contact with the mattress to besewed. The 'roll forming mechanism will first be -described.
Roll forming mechanism A vibrating guide or mounting bar56 (Figs. 6,1?- and i8) ispivoted by-a pivot. 51 to an internalboss 58 in the carriage head 59, and. at its opposite end carries the roll forming movement indicated generally at 6|]. This movement comprisesan actuating link 6| anda bowedpivot shifting link 62 pivoted to'the mount ab'aCOmmon pivot 63. A bowed clinch operating 64 and a presserfinger link 65 of about equal length are. pivotally secured toactuating link-6i, and may be connected together at a common pivot 66. A. roll former element inthe formof a gathering point or needle 61 has a shank portion 68 (Fig. 14) by which it is'pivoted at. 69 tolink 62, and the end of theshank portionis.
pivoted at H to thebowed clinch operating" link 64. A pair of flat bars 12 are suitably clamped inspaced relation to mount. bar 56 to provide av guide-slot for. the operation of bowed links62 and 64. The distance. between. pivot points 69 and H in the shank 68 oftheroll forming point.
preferablyis slightly less than the. distance :between the pivot points 63 and 66in the actuating; linkfil. Links 62 and 64 maybe ofequal length between their respective pivots 63, 69and. 68,, H.
Aroll forming element in theform ofa bellcrank roll presser finger I4 carried by the mounting; bar 56, is pivoted thereto at 15, and the end. is pivoted at 16 tolink-GS. In the positionshown: in Figure'l the roll forming packing needletl and presserflnger 14 are inispread position and:
are .out of engagementvwith the mattressedge:
which passes through. the C-shaped mouth 1.8 in themount bar 56.
arm Which is pivoted at to a boss on the carriage head. A similaradjustable connecting rod 86 is similarly swivelled by a universal swivel at 81 to'the end of actuating link 6|,and at'i88 to a cam follower-arm 89, which.is alsopivotally connected at 85 to the carriage head. 6 Follower arms 84, 89 carry rollers 9| and 82 respectively (shown schematically in Figure 11) on stems 93 111 the face of motion varying cam plate 94'.
Camplate 94 is suitably journalled for rota tion in the casing and carries a spur gear 95 (Figstfi and-8). A pinionlnotshowny on. spindle 96 and in' meshw-ith gear "95- carriesa sprocket 91 which is driven by a chain- 98 passingover the sprocket and over a driving sprocket surmise 4) operated byithe power input shaft extending into reduction gear box 41. The cam groove 93 has'a circular or dwell section 9311. (Fig. 11) of smaller'radius, and a circular or dwell section 93b of-larger radius, which sections are each about 90 in extent, respectively, and are joined by a connecting groove portion 930 of about 45 in extent, and a spiral connecting retracting portion 93d of about 135 in extent. The portion 930 preferably is concave to reduce vibration in the cam followers.
Operation of roll former The cam plate 9:3 rotates in the direction of the arrows shown in Figures 7, 8 and 11. Referring toFigure 8, the packing operation has been completed and the packing needle 61 is ready to-withdraw from the mattress. When rollers ill and 92 (Fig. 11) enter the spiral withdrawing portion 93d of the cam, which is the portion extending from the small radius part 9311 to the large radius part 9311, follower arms 84 and 89 move (Figs. '7 and 8) in unison gradually radially outward from the cam center (or to the *left) about their pivot 85, and through connection links 8|, 8'5, actuate the packing needle control links GI, 62, 64 to draw the packing needle 61 away from'the mattress in a substantially lineal or echelon movement about the pivot 63. The packing needle remains in withdrawn position while rollers 9| 92 are both on the dwell portion 93b of. larger radius of the cam. When advance roller 9I enters on the concave portion 930 of the cam, cam follower arm 84 (Fig. 7) swings on its pivot toward the center of the cam, (or to the right) and through connecting rod 8'I swings driver link 62 about its pivot 63, thereby increasing the distance between pivots 6B and 69 and causing link 68 and its needle 67 to' rotate clockwise about pivot II and assume the position shown in Figure 7 ready for ascending movement. Continued rotation of the cam causesroller 92 to enterthe connecting portion 530 of the cam, so that links 6| and 62 turn together upwardly about their pivot 83 to cause the packing needle 61 to ascend in a substantially straight line motion into the mat tressf .When roller 9! practically reaches the dwell portion 93a of smaller radius on the cam, further forward movement of pivot point 69 is arrested and as trailing roller'92 enters portion 930 of the cam, it pivots link 54 to move pivot point 'II and thus causes counterclockwise rotation of needle E'I about pivot 69 in a prying or clinching movement to pack the material into the corner roll of the mattress. At the same time movement of link 65 closes packing finger I4 externally over the packing needle to substantially the position shown in Figure 8, so as to compress the material at the base of the roll. The roll is maintained compressed while rollers SI, 92 are on the dwell portion 93a of small radius of the cam. 'The next movement is the withdrawing movement as above described, to repeat the cycle of operations. 7 i
It will be understood that the designation of links 62 and 64 as pivot shifting and clinch op,- erating links respectively, is relative, as the roll forming mechanism maybe modified so that link 8 becomes the driver or pivot shifting link, the pivot 69 being suitably mounted to be shifted for the clinching movement- Also, in place of the roll forming movement described, any other suitable roll forming movement may be 'employed.'-
Roll shaper" Asseen in Figure 10, the front cowl or hood I02 provides a slot I03 which is received in the mouth 18 of the mounting bar 56, and a concave bar I04 (Figs. 10 and 16) is located at the base of the slot and is adjustably held therein by a set screw I05 extending through the slotted end flange I05 thereof into the cowl. The edge roll formed by the packer point 51 and finger It abuts bar I04, which serves to smooth the roll. The bar I 04 can be adjusted toward or from the bottom of' the slot upon releasing screw I05, and can be clamped in adjusted position. The adjustment of bar I04 also providesfor regulating the thickness of the formed roll therein by the packing needle, the degree of v compression of the material in the'roll being determined by the depth to which the mattress corner initially is manually fed into the slot or groove I03.
Sewing needle movement The mounting bar 56 has two extensions I08 and I 09 (the latter forming the lower jaw of mouth 18) which carry between them a guide rod III, and a needle block II2 has a bore II3 therein to receive said guide rod. A track or channel bar IM (Figs. 6 and 9) also is carried by the bar 56, and a roller I I5 suitably journalled on a spindle IIG carried by the block, moves in the track or channel of bar II4. Rotation of the block IIZ about guide rod I II as it reciprocates thus is prevented. Block II2 carries a long grooved sewing needle II'I having an eye at its point, and when the block moves upward along its guides the needle passes through aligned guide bores H8 and H9 (Figs. 9 and 1'7) in the jaws I09, I2I of mouth 78.
Needle block II2 has a link I22 universally pivoted thereto at I23, and the opposite end of the link is universally pivoted at I24 to one end o'f'pitman I25. The other end of the pitman is universally swivelled at I26 on a suitable boss in the casing. A crank pin I21 (Figs. '7 and 11) in cam plate 94 has one end of connecting rod I28 journalled thereon, and the other end of the connecting rod is pivoted at I 29 by a universal pivot to the pitman. The crankpin I2! is located on the cam plate at a predetermined angular relation to the cam track 93. Thus, rotation of the cam plate causes the crank pin and connecting rod to oscillate the pitman I25, which in turn reciprocates the needle block II2 on its guides and causes the needle alternately to penetrate the base of the mattress roll located in the cowl slot Hi3 and to be withdrawntherefrom. The thread loop in the needle eye is picked up and interlocked with the bobbin thread and the needle movement is synchronized with the action of the roll forming mechanism, all as will hereinafter appear. 1
Needle angle adjustment The carriage base I4 has an extension I30 (Figs. 21 and 22) suitably bolted thereto'by bolts.
through into a threadedbore I31 in the extension holds the head in adjusted position. By releasing handscrew I36 the head may be rotated in boss I3I to the desired angular position.
The shuttle shaft .and has a thread finger I41 extending I therefrom and has a hook or retainer I48 located in a suitable cut away part of the shuttle. The bobbin thread I49 (Figs. 6 and 9) iromthe bobbin I'5I is strung, through a hole in the bobbin shelland through a suitable spring friction drag on the shell I46 (not shown) and through holes I 52 and I53 in the finger. A convex head thumb screw I54 holds the bobbin in the shell I46. A hollow needle guard I55 swivelled on the upper jaw I2I is engaged by finger I41 to keep the finger in proper position, and also serves .to prevent finger I41 from getting into the path of the needle.
I Thread tension A thread tensioning arm I56 is pivoted intermediate its ends by a pivot I51 passing through extension boss I58 on pitman I21, and its one end is pivoted at I59 to an end of arm IEO. Arm I60 is held at the other end by universal pivot 85. The thread I6I for the needle passes from the supply ball in side cup I62 (Fig. 4) through a friction drag I63 (Fig, of suitable construction and then through a guide I64 and through an eye I65 in the cowl or hood I02, and then through an eye I66 in the end of the tensionin arm, then through an eye I61 in the needle block I I2 and thence to the needle eye. Each time the needle moves downward the tensioning arm I56 moving therewith draws the stitch taut and near its final downward movement draws additional thread through the friction drag I63 from the supply ball in readiness. for the next upward movement of the needle. 0n the upward movement of the needle the tension arm moves along upward with the pitman to provide the slack thread for the loop at the eye of the needle.
The looping operation After the needle H1 and its thread I6I has passed through the base of the mattress roll, the looped thread in the eye of the needle is picked up by the looping hook I45, and as the hook is carried around by the shuttle, the loop is first caught on retainer I48. Continued rotary movement of the shuttle and looper hook I45 twists the needle thread I6I over the bobbin thread I49. The shuttle is rotated at doublethe speed of cam 94, so that the needle and tension arm is only half retracted by the time looper hook I45 reaches inverted position, shown by dot and dash lines in Figure 6, and the retraction of the tension arm I56 pulls the loopoff the looper finger I 45 and draws the loop tight over the bobbin thread which extends fromfinger I41. Movement of the tension arm beyond the needle} block eye draws enough thread from the supply hall to provide thread for the next stitch. The e ee f t ut a d o per bei sknown in the art, further explanation of the looping operation is not deemed necessary. It is to be understood that anydesired type of shuttle or stitch forming mechanism may be employed in place of that illustrated.- I
Synchronization of sewing and roll forming operations Referring to Figure 11, wherein the operating cam is diagrammatically shown, the crank Din I21 connected to pitman I25. causes the needle to complete one sewin cycle for each rotation of the cam, and thelocationof cam rollers 91-,
92 on their follower arms is such that theroll, forming operation is completed at or before the;
sewing needle enters the base of theroll. The
crank pin preferably is located near; the'end of; the retracting portion 93d of the cam, so that. retraction of the roll forming mechanism be ins.
before the sewing needle ,starts to withdraw from the mattress. (counting from about the time the packing. needle contacts the mattress until it is com.-
pletely: withdrawn from the mattress roll) plus I the sewing operation, (counting from ,the. time; the needle enters the mattress to aboutthe time it is completely withdrawn therefrom) occupies about 300 of the cam cycle. During the re maining 60, more or less'of the cam cycle, the roll forming and sewing needle are completing theirrespectivecycles of operationin readines for the next successive operation.
As the stitcher carriage is beingmoved for:
ward at all times by the engagement of rotating gear 28 with rack I2, it is apparent that during; about 800 of the cam movement, covering that;
period during which either or boththe packing needle and sewing-needle are in contact withthe mattress, these needles must bemovedretro gradely relative to theadvancing stitcher; carriage at thesame speed as the forward motion of the stitcher carriage. Or otherwise stated; the packing needle and sewing needle. remain .-in-
aflfixed location in contact with the mattress While the stitcher carriage moves forward, andafter .contact of the needles with the mattress ceases, the needles areadvancedin 60? of the cam rotation (more or less) to catch up with or overtake the stitcher carriage, whereupon they. again are movedretrogradelyasabove described The mechanism for. vibrating the roll forming and sewin movements in this manner now will be described. I I I Lateral vibi dtingniechanism Cam plate 94 has a peripheral warped groove or track I68, and the lateral extension I69 of arm 56 carries a roller I1I operating infthe track. A portion of the cam track I68 is sharply warped at I68a out of the normal planeof rota-- tion for an axial distance correspondingio slightly less than the length of astitch, and has a gradually sloping or retrograde section designated at I681 The gradually sloping section. which corresponds to the retrograde 'phasefis about 300 of the; periphery, while the sharply warped section corresponding to the overtaking or advancing phase is about 60. These sections may be varied as desired in the design of the apparatus. As the cami-plate rotates,
the roller I1I operating in. the track I68 later-' The roll forming operation,-
asoorzestz while the sewing-or" packing needles are "in-con tact-with "them'attress; roller I1 I is in the retrograde s'ection I 68b of-the-camtrack, and-whenthe sewin'g' Y needle leaves the mattressand is b'ein-gpulled-taut" by the tension arm. I56 while.
the' needlei'i's moving downwardly, which .occurs dUrliigithetime 1th'emountbar'56' is in the overtaking'phas'e .of its ;movement. The overtaking movement of bar'r56 thus '1 exerts a forward pull onfthemattress through the'thread, and a gripperji-s .providedito hold the mattress stationary against thisp'ull; In the preferred embodiment the'tgripperis:carriedby the "carriage and oscillates in'displaced phase'relativeto .the bar 56. 'I'hegripping "mechanism willnow be described.
Agripperjarm; I15--is pivoted to the carriage hea'd 'at I16 iiioverhanging; relation to the .cam plate 94, and a--roller-I1'1' (Figs.' 11 and 19) depends therefrom into the cam track'yltll, whereby the-"'gripper- -arm is oscillated laterally forward' andb'ackward-by the cam; Thejarm I15 isflisp'osd atsubstantially arightangle to "mount arnrfifi} and-the roller I11 is 'angularly'displacedfrom the roller 11!; which governs-the oscillationof theisewing and roll formingmechanismsy'by aboutthesame angle, namely 90".. Thus-L -during"the'whol'e-time that'roller I1.I is in the 'advancing section I68aof' the cam andv is'moving arm-'56 'inits advancing or catching up-phase, the gripper'arm-I 15 is;moving retrogradelyr due to the engagement "of its roller I 11 ii'f-theretrograde portion -I68b of the camtrack'. The gripping-action-on-the mattress occurs duringi the retrograde action-ofiarm' I15 and is timed to include the period of" advancing move ment'ofb'arili; as will nowbe explained.
Gi-ipp'erarm-l15-at-its outer end carries a stub'shaft I18 (Figs-:19 and 20) journalled there in to which is suitably secured, as by a split clamping portion-,-the lower curvednjaw I19. At its one end stub shaft I18 carries a gear segment-I 81 Aasecondparallel stub shaft 1 82, also rotatably journalled inthegripper arm above shaftr-.'I18,acarries atmeshing. segmental gear I 83 at onexzendiandz at its. other end'is suitably secured ithe -upperr-cin'vedgripper jaw I8 1. The bitingg-iedgesztof.jaws-I19; I841r'nay be scalloped orrserrated to improve'their: gripping action.
, Camw-plateefl 'has" a shoulder which-provides aircami-tsurfa'ce; I 85' (Figz'll) comprising-a cylindricali: portion "1 85m and a projected cylindrical portion I851) joined thereto by connecting portions tfl5crand I85d of?any suitable-shape; .A portioxr ofathe cam plate' may be relieved at I86 to save-material;- and the cam: track 85is' warped around: thezreli'eved portion whil naintaining itsn-clcyli'ndrical surface; A jaw a tuating arm I81;."suitably clamped'to stubshaft I18, carries a roller l88 'at its 'endfand a'helical tension spring I89, stretchedbetween a pin I 9I on arm, I15 amtra hole -192iin-actuating arm I81,'ho1ds the roller- 1 88: in engagement :with iitheicami slIl'fzm.e.-:=
When roller I88; is 1 in engagementzwithdwell; portion I a.. of the. .oam.;the spring 189i acting;
through arm I81 andgear segments I 8| and I83 maintains the jaws in closed or clamped position on the mattress roll; When roller I 8.8 enters upon=-the forward 'portion- -lfic of the-camreib.
tension, the jaw-actuating-arm I81 is.--.rotated clockwise-with stub shaft I18 as its pivot. and
by means of meshing gear" segments I 8 I,'..I83
causes both jaws I19, I84 to open-and-release their hold on the -mattress: The laws remain. in open position until the roller I88 passes-over v thedwell portion I85b; and start to close when the roller enters the connectingportion a I 85d: of the cam, and are naintainedclosed while the.
roll'er'tr-aver'ses the dwell portion: I 8500f: the cam.- The portion :I85b 'of" the cam is=ab0ut:60 fin;
extent-and is timedto engage roller I88: during the advancing portion 0f the cycle or operation: of"gripper-'- arm :I15 and acts on roller I88 dur-jing' the timethe sewing needle is in engagementwith the -mattress; and while themount .bar 56 ismoving retrogradely.
Comer. turnin ppemtion Referringito :Eigures: 1:.Lto; 5 ;and". 15, .itwil1=be:
around theborner. .Advance base roller I 9 there fore. ,commenceshto describe a circle at the point I fabout the apex. roller as. its .center, as shown by the dot and dash circ1e,gand the outside corner, ofithe .rail is cutaway at thepoint where the base roller commences .its .arcuate movement. This cut.v away portion. 32"preferably is, formed as a' curve. about the apex roller. .as: the center *and' meets thestraight portionof the rail at I95xiand I96 soras to'providetan engaging surface'for roller I9, althoughthe surface'32 'may'be angular; if desired." Trailing rolleryitat thesame time also commenoes'to describea-circle on the same radius and leavesthetracktsurface 22- until "its course brings it-topoint I95 Where it: engages; curved surface'32;
When'rroller' I 9, reaches: thepoint I 35' it leaves the railsu'rface-ZZ in its arcuate path. Although in describing thexturneither-or both rollers I9, 2| may leave the track surface22lor curved surface 32, the carriage is 'heldsteady by the engagement of'gear '28on rackiILas' it advances thecarriage around." the corner. .iWhen. trailing 'roller. 2| reaches thepoint-IBG, the pivot roller gives up its pivot position-andadvances along rail. II at right anglesto' its approachpath. The base line 12 between the Lcenters of rollers I9, 2| is a chord of th'e'turning circle; and. the altitude of the triangle is "designated'at-a; The radius of curvature of surface '32 islonger'than the distance to between-outersurface "22*"and. the. center of apex roller '26.
' The altitude "line a lies on a radiusof theturning circle and by timing the sewing needle move-.-
If the sewing needle is located to penetrate at the base of the altitude lined, or between the base and the apex, the stitch spacing at the corners will be slightly shorter than on the straightaway. By locating the needle to penetrate on the external extension of line a, the stitches may be made the same length or longer than on the straightaway. The imaginary line between the sewing needle and the packing needle in mouth 18 may make any suitable angle to the radius line r. However, by having this imaginary line perpendicular to radius line 1', a tangential relationship to the stitch circle will be maintained in going around the corners. Such a relationship generally is desirable. I
Operation of complete apparatus The operation of the entire apparatus now will be described. A'mattress to be stitched isplaced upon the table I which is raised or lowered as required by suitable operation of motor 8 to bring the upper edge thereof on a level with the slot .I 03 in the cowl I92. The mattress then is positioned by the operator with its edge parallel or coincident to the edge of the table and engaging roll shaping bar N14. The thickness of the roll may be-adjusted by adjusting the depth of roll shaping bar I04 in the slot I03 and clamping it in adjusted position by screw I05. The carriage head 59 may be turned as desired inthe boss I3I to adjust the angle at which the needle enters the side of the mattress, and is locked in adjusted position by tightening the clamping screw I36. Because all the pivot mounts 51, 85, I26 and III? are on the casing, rotation of head 59 does not affect the phase relation of the various cam followers relative to each other. That is, rotation of head 59 shifts all parts cooperating with the cam inuni son. A sufiicient length of the bobbin and needle threads I49, IBI are drawn out and held by the operator, and the apparatus is ready to begin operation.
- Beginning with the apparatus in the position shown in Figures 6 and '7, the sewing needle II! is shown retracted, and the packing needle 61 has been turned in readiness, for upward movement. Movement of concave cam portion 930 (Fig. 11) under rollers 9|, 92 pivots links 62, 64 counterclockwise about pivot 53 and advances the packing needle 6'! into the side of the mattress in a substantially straight line movement; Then, coincident with the clinching movement of packing needle 61, thepresser finger l4 movesinward to ward the mattress and holds the roll in position against the roll shaper bar I04. The sewing needle now penetrates the base of the roll while the rollers BI, 92 on the dwell portion 23a of the cam hold the packing needle and .presser finger stationary. During this phase of the operation the whole mounting bar 56 carrying the roll forming and sewing elements, is moving retrogradely, and the gripper jaws I19, I84 have engaged the mattress roll in the position shown in Fig. 9. The looper hook I45 catches the loop in the eye of the needle and moves around to inverted position, shown in dot and dash lines in Fig. 6. The packing needle withdraws from the roll in an arcuate parallelmovement,.andby providing a relatively long withdrawing period for the packing needle, deviation from a straight line movement while the needle is in the roll is not of consequence. Then the sewing needle is retracted and the retracting tension arm I56 pulls the loop off of the looper hook I45. The mounting bar 56 now quickly completes its overtaking or advance movement while the gripper jaws continue to hold the mattress edge and continue their retrograde movement as shown in Figure 6.
The continued downward movement of "ten-- sion arm I56 pulls taut the needle thread, which has been 'twistedover the bobbin thread, and as the eye I66 thereof passes the eye I61 in the needle block in its downwardmovement, additional thread is drawn from the supply ball for the "next stitch. When the packing needle reaches the position shown in Figure 18 the rollers 9|, 92 on cam 94 turn the needle to the position shown in Figure 7 ready for the next ascending movement, while the grippers are still movingretrogradely but are near-the end of their retrograde movement. When thepacking needle enters the mattress edge at an advanced position, the grippers release the mattress roll and make a quick advance movement to the position shown in Figure 9 ready for retrograde move ment, and the rollforming and sewing cycle as above described is repeated. When the carriage rounds a corner of the mattress about the center of apex roller 26, the sewing needle is always substantially on a radius, and the line between the sewing needle and roll packing needle is tangential to the stitch circle or are; Because it is not necessary to start and stop the whole sewing and roll forming mechanism each time a stitchis made or a sectionof roll is made, the operation of sewing is greatly accelerated. In addition, byfoperating or timing the mechanisms from a: single source, which is the cam plate 93, the mechanism is greatly simplified.
Modifications In Figure 23, is illustrated a modified form of roll former, which is particularly adapted for use on mattresses employing a light weight ticking. The modified oscillating mount .bar 2!", which replaces mount bar 56 in the carriage, carries a pair of bell crank presserfingers 202 and 203 pivoted at 204 and 205 to the jaw mem-- bers 206 and 201 thereof. These fingers en gage the side and top of a mattress along the edge in the roll forming operation. An actuat ing arm 208 (corresponding toarm 6|) is pivoted at Zll S at one end to an extension 2 I I. of the mount bar, and a pair of connecting links ZIZ and 2I3, corresponding.respectively to links 65 and 64, extend from a common pivot. 2I4 at an intermediate part of arm 208v and are pivotally connected at 2I5 and M5 to the ends of presser fingers 2G2 and 203 respectively. In the sewing operation, the needle passes through aligned holes in jaw members 206,.201.
A cam track ZI'I replaces the track 93 and has a dwell portion 2H1) of large radius, and finger opening and closing portions H and 2nd,, A roller 2IB is, carried on a. suitable single cam followerwhich is connected by. a link 2I9 to the end of actuating arm 2ll8by a universal connection. The cam, follower and connecting link are diagrammatically illustrated in Figure ,23, and the center of rotation of the cam track 'ZI'I is diagrammatically indicated by the crossed dot. anddash lines. The needle block and guide therefor carried by mount bar ZOI are constructed andoperated substantially as shown in Figures 7 and 18. i Whe 4 the cam roller 2H} is on the dwell part 2 I lb of the car'n track, therollis being held com pressed by'the fingerslflz, 203 in"-the"position shown in Fig. 23, while the sewing-needle enters the roll, has its thread loop picked up by the e tates.
002921121 1ihfillflithQIhWS rnmtherdl. -When the'cam roller is on the portion21f1dofthecam, heeact atinsarm; .9 2 bein swun cl kw at. t' .incl-p v t:12 9.1, hus. withdr w n h pres erifineersrzflzia d 1 v fr m..;t e o -W e t e.camrro l r218- s the ort on ,1 1; wheit a ls heractuati -a m 2.081s swun cou er clockwiseabout itspivot 209, thus rotating finger 2fl2 clock ise andfinger 203 counterclqckwise about ,their respective pivots 204, nd :2 1t9: r0 1 om ress n p s ion. vIn this modification, the presser; fingers, which constiutez hecrc formin m nt e e a o r inchine m tion. n y nd ret a f m r..ba e.-t rcuehv u t n i l y the semen)- tary ath f movement that they-take in form- 1...:e2mcnt. f course hat thedi ec-v ent is reversed. If desired, the caimgnayhavepa dwell portion of suitable extentgbetween portions 21 1d and 2 1 1c thereof n fi urese Q- 'Z themo fie m un b r 220 has-a bloclg;.2 21 extendingfcrwardly between the .;extenSi9ns; -;109,5l2 1 constituting the mouth 1B,:a-nd; a; guide. rod 222 is suitably mounted therein. A yoke member 223 has a sleeve 224 whic 'sslidable, on the guide rod so that the M capable, of: reciprocation thereon. The legs-; 2 2 5,; 2200f the yoke have the-roll forming elements-. -202, 203 pivotedthereon at 221 and 228 respectively,; and connecting links 212, 213 are pivetally connected at their ends thereto at 215 and-. -210;. An extension 229 on the yoke carries a. --;hell; crank 'lever -230 pivoted thereon at 23", and the links 212, 213 are pivotally joined together at 232 on one arm of the bell crank. Rotation of the bell crank 230 about its pivot 231 thusoppositely rotates, the bell crank presser fingers-2.202, 203 in the roll forming operation. Ashaft, 235 .journalled in the housing carries a. cam, follower 236;diagrammatically shown in Figure,,,27, which cooperates with a suitably sha e cam 23'lthattimes the oscillationthereof, .anda crank. arm, 238-- (Figs. 24 and 27) is carried by this fshaft. A rod 239 suitably adjustable in lengthconnects arm 238 withbell crank, 230- Rod;239 i s secured by universal connections to cranks 238 and 230 so as to allow yoke 223 to oscillate with mount bar 220., The roller 112 carriedon asuitable extension 2400f the. mount baroperates .in a suitable trackto guide the mountbar in its advancing and retro: gradeoscillation. V
A shaft 241 suitably" journalled in the housing carries a cam follower 242 diagrammatically shown in Figure, 27 which cooperates with. a second cam 243 that timestheoscillation thereof. A block 244 with trunnionson itsend is carried by shaft 241, and; an arm 245 hasa yoke 246 atone end journalled on the trunnions.
The =opposite end of arm 244 has a slot. 241 which receives the pin 248 securedin sleeve 224. Oscillation of shaft 241 .upon its axis thus causes-the yoke 223. to. reciprocate upon guide rod 222, carrying with it the bell crank 230, the slot and pin connection 241, 248 allowing for the, angular differential movement. between-arm 245 and pin- 248. The-pivotal connection-of yoke 2.46,.0nthe. bl0ck .244-allows the arm 245 130 oscillate with mount bar 220 in its' retrograde and overtaking movements, and the universal connections of rod 239 with cranks 238', 230 also permits such oscillation without substantially displacing-crank; 230: The sewing -needle;may operatedrin any suitable. mann r: e; pe ation ;:th; s m dificat ns. as ol.-
l ws:v Ther.-mount;-.bar 21 0- arry ngth ..-:a v described; roll former elements and the vrecipreg eatingsewing needle is oscillated with a retro-v grade and overtaking movement, like mount arm 50. The timing cams 237; 243shavesuitably shaped. portions to oscillate shafts 235, and .241 forv effecting movement of the roll forming ele ments- As shown in-Figure 24,:the yoke 223 is ready to move intoroll forming position, and the corresponding cam positions and follower arrangements therefor are diagrammatically shown in Fig. 27. Follower 236, is on the dwell portion 23?! of larger radius of cam 23'! and follower 242 is onthedwellportion 24312 of larger radius of cam 243. When follower 242 enters connecting portion 2 430 of th y cam it turns shaft 241 clockwise and through arm 245' moves the yoke 223 downward along, guide; rod222;to the position shown in Figure 25. Because ,oftheuni-z versalball and socket joint connection of rod 239 with-cranks 230 and 230, and because .rod 239 joinscrank 238' close to pivot shaft 241, movement ofthe yoke occurs without substantialrotation of hell crank 200; The roll formingfingers 202; 203 thus are-moved in a-substantially rectilinearpath into engagement with the mattress. Follower 242. now enters on dwell portion 243m of smaller radius of the'cam243, to hold the yoke in this position.
Now, follower 236 comes off of dwell portion 23121 of larger radius of cam'231 onto connecting portion 2371c andjthus turns shaft 235-counter clockwise, which in turn through rod 239:turns bell crank 230 clockwise. This moves the common pivot 232 of links 212,213, downward to the position shown in Figure 26, thus'rotating the fingers 202, 203 about theirpivots221, 228 to form and compress a roll'at the edge of the mattress. The fingers, 202, 203 are held in this position while followers 242 and 236 engage the cam'dwell portions 243a and 231a respectively of smaller radius.
After the sewing needle enters the base of the roll and is withdrawn, for example, as explained in connection with the'previously described modifications, the'followers 236, 242 simultaneously have' reached the connecting portions 231d and 243d respectively,and simultaneously turn the shafts-235- clockwise and 241 counter clockwise. This. causes arm 245 to raise yoke member 223 at thesame time that arm 239 rotates crank 230 to move common pivot 232 and cause roll; former elements 202, 203 to be reversely rotatedin the withdrawing movement to clear the compressed edge'roll. That is, the pivot points: 221, 228* of the roll former elements are being moved at the same time that the elements 202, 203 are being rotated about these pivot points. Thus in the retracting movement the ends of the roll forming elements describe a cycloid path which moves them clear of the compressed roll in one continuous movement.
It will,be observed that in this modification theroll former-fingers 202, 203 have only three movements, namely, 'a rectilinear movement which brings them into engagement with the mattress, a rotary or clinching movementwhich gathers and compresses thematerial of themattress into? r011, andga, cycloidal releasing or retracting movement. By reducing the .7 roll forming movement to three such motions, the construction and operation is greatly simplified. If desired, one or both of the presser fingers-202; 203 in this modificationmay be replaced by pack- 1 1 ne d es-l Theytimingcams for shafts 235 241 have suitable dwell portions so as to determine the duration of the various movements or phases of the roll former. During the contact of the roll former or needle with the mattress the mount bar 220 is moving retrogradely, and th retraction of the roll former occurs at a suitable period in the overtaking movement of the mount bar.
Although the roll forming movements herein described are employed in connection with an oscillatable mount for retrograde and overtaking movement, it is to be understood that they may be employed, if desired, in the conventional starting and stopping carriage mechanism. of the prior art, with corresponding benefits. Various other modifications may be made without departing from the spirit or scope of the invention.
Having described our invention, we claim:
1. In an apparatus of the character described, the combination of sewing means intermittently engaging an article to pass a needle into said article; a supporting carriage for said sewing means; means for continuously advancing said carriage; means providing relative movement between said carriage and sewing means to allow said sewing means to remain substantially stationary in contact with said article while said support is advancing, and means for periodically advancing said sewing means relative to said carriage while out of engagement with said article for successive operations on said article.
2. In an apparatus of the character described, the combination of: a sewing mechanism; a supporting carriage therefor; means for continuously advancing said carriage for successive operations on said article; and means providing vibrating movement between said carriage and sewing mechanism to allow said mechanism to remain substantially stationary in contact with said article, while said support is advancing and to periodically advance said mechanism while out of engagement with said article.
i 3. An apparatus as specified in claim 2 having a looper mechanism movable with said carriage, and wherein said sewing mechanism includes a needle having a sewing movement transverse to the path of movement of the carriage.
4. In an apparatus of the character described, the combination of: a supporting carriage; a sewing mechanism pivoted on said carriage for intermittently engaging an article to pass a needle therethrough; means for continuously advancing said carriage for successive operations on said article, and means providing synchronized vibrating movement of said sewing mechanism on said carriage to allow said sewing needle to remain stationary in contact with said article while said support is advancing.
5. In an apparatus of the character described, the combination of a roll forming mechanism; a sewing mechanism; a carriage therefor; a stationary support for said carriage; means for advancing the carriage along the support for successive operations on an article; and means providing vibrating movement between said carriage and mechanisms to allow said mechanisms to remain substantially stationary in contact with said article while said support is advancing and to periodically advance said mechanismswhile out of engagement with said article. i
6. An apparatus as specified in claim 5 wherein the advancing movement of said mechanisms is less than half of the operating cycle.
'7. In an apparatus of the character described, the combination of a sewing mechanism; a car riage for said mechanism; means for continuously advancing said carriage; means for vibrating said mechanism to maintain it in stationary relation in contact with an article being sewed while said carriage is advancing; means for gripping said article during the time said sewing mechanism moves out of engagement with said. article in the direction of movement of said carriage; and means for moving said gripping means retrogradely during the gripping operation.
8. An apparatus as specified in claim '7 wherein said carriage carries a roll forming mechanism vibrated in unison with said sewing mechanism.
9. In an apparatus of the character described, the combination of: a roll forming mechanism intermittently engaging an article to form. a roll thereon; a carriage for said mechanism; means for continuously advancing said carriage; means providing relative movement between said carriage and roll forming mechanism to allow said roll forming mechanism to remain substantially stationary in contact with said article while said carriage is advancing; and means for periodically releasing and advancing said roll forming mechanism for successive operations on said article.
10. In an apparatus of the character described: a movablecarriage; a rail providing a pair of spaced guiding surfaces having angularly disposed portions; a cylindrical guide track carried by the rail along its length; a pair of swivelled grooved casters carried by said carriage and operating on the track to support the car riage on the rail; contact members carried by the carriage comprising a pivot member engaging one of said surfaces and a pair of base contact members engaging the other of said surfaces; a cut away surface portion joining the angularly disposed portions at the points of departure of the base member from the guide surface in rounding the corner whereby said carriage can turn the corner at said angularly disposed portions about the pivot member as the center. 11. A roll forming mechanism for a mattress comprising a pair of roll forming elements, adapted to engage the mattress, at least one of said elements being a blunt finger; means pivotally supporting said elements; means for moving said pivotal support to bring said elements into engagement with a mattress; means for oppositely turning said elements in their moved position to form a roll; and means for simultaneously withdrawing and reversely turning said blunt finger out of engagement with said roll in a cycloid path; and means for simultaneously withdrawing said other element.
12. A roll forming mechanism comprising a pair of links pivoted on a common fixed pivot a roll forming point pivoted to the end of one of said links, means to oscillate the one link, and a connecting link pivoted at one end to the other link and at the other end to the roll forming point.
13. An apparatus as specified in claim 12 having means connected to each link of said pair of links for independently moving said links about said common pivot.
14. An apparatus as specified in claim 1.2 having a presser finger located to cooperate with said roll forming point, and a link connectin d presser finger to one of said pair of links.
15. A roll forming mechanism comprising a pair of links pivoted on a common fixed pivot; a roll forming point pivoted to one of said links; a connecting link pivoted to the other link and to the roll forming point whereby the roll forming point is carried by said links; a presser finger pivotally mounted to cooperate with said roll 19 forming point; and a link pivoted to the presser finger and to said connecting link.
'16. An apparatus as specified in claim 12 having a carriage; a mounting bar carried thereby vibrating movement, and in which said fixed common pivot is carried on said mounting bar.
17. In an apparatus or" the character described; a carriage; means for advancing said carriage; a mounting bar on said carriage; a roll forming mechanism carried on said bar; a sewing needle carried on said bar, means for actuating said sewing needle and roll forming mechanism; and means for vibrating said bar with a retrograde and overtaking motion.
18. An apparatus as specified in claim 17 in which said actuating means includes motion varying means mounted on said carriage, and motion transmitting links universally connected to said roll forming mechanism and sewing needle.
19. An apparatus'as specified in claim 17 in N which said actuating means comprises a cam member having a cam surface for actuating the roll forming mechanism and a crank for operat ing said needle.
20. An apparatus as specified in claim 17 where- .in said bar vibrating means comprises a warped cam surface on said cam member and said bar has a follower engaging said warped cam surface.
21. An apparatus as specified in claim 17 in which said actuating means comprises reciproeating means for said needle; means mounted on said bar for guiding a needle for reciprocating movement; a crank member; and motion transmitting links between said crank and needle including a universally pivotal connection.
22. An apparatus as specified in claim 17 having article gripping means vibrated in displaced phase relative to said bar, and means for actuating said gripping means.
23. A clamping assembly comprising a pivoted arm: a pair of clamping elements pivoted on said arm, means connecting said elements for opposed pivotal movement, an actuating arm connected to one of said elements, cam means engaging saidlatter arm to pivotally operate said clamping elements, and means to oscillate said first arm.
24. In an apparatus of the character described: a carriage; a cam member journalled for rotation on said carriage; a mount bar pivoted to said carriage and engaging said cam to be actuated thereby; a sewing needle mounted on said bar; means on said cam for operating said sewing needle; a roll former on said bar; means on said cam for operating said roll former; a gripper member mounted on said carriage; means on said cam for actuating said gripper member; and means on said cam for vibrating said gripper member out of phase with said bar.
25. An apparatus as specified in claim 24 having a head pivotally mounted on said carriage, and wherein said bar, and gripper member are mounted on said head.
26. In an apparatus of the character described; a sewing head; a mount baron said head carrying a needle reciprocating mechanism; a rotary shuttle carried by said head; a bobbin casing in said shuttle having a finger extending therefrom; means forvibrating said mount bar and a guard for said needle on the mount bar engaged by said finger.
27. An apparatus as described in claim 25 wherein said finger carries the thread from the bobbin.
28. In an apparatus of the c aracter described; a'movable carriage; guiding means therefor providinga pair of spaced guiding surfaces having member at the corner, on the pivot member as the center of turning.
29. A roll forming and stitching mechanism comprising: a support for an article upon which a roll is to be formed and stitched; a carriage arranged for movement along said support in 0pcrative relationship to an article thereon; drive means for moving said carriage substantially continuously; a roll forming mechanism for repeatedly engaging and releasing said article and operative, during successive engagements, to form successive portions of said article into a roll; a sewing mechanism for repeatedly engaging and releasing said articlewhen it is respectively engaged and released by said roll forming mechanism and operative, during successive engagements, to stitch successive portions of said roll as it is formed; a head carrying said forming and sewin mechanisms; means mounting said head on said carriage for forward and rearward movement relative to the direction of movement of said. carriage; and means for moving said head rearwardly relative to the carriage as the carriage moves forward during the engagement period of said forming and sewing mechanisms and'for moving said head forward relative to the carriage as the carriage moves forward during the releasin period of said mechanisms.
30. The mechanism of claim 29 wherein: said head is pivotally mounted on said carriage for swinging movement forwardly and rearwardly relatively to said carriage.
31.'A sewing mechanism including means to move a needle carrying a thread through an article to be sewed; a supporting carriage for said sewin mechanism; means for continuously advancing said carriage; and means vibrating said needle moving means back and forth along the path of advance of said carriage in synchronism with the in-and-outmovement of the needle to allow said carriage to advance while the needle is in contact with the article to be sewed.
32. A roll forming mechanism comprising: a pair of cooperating roll forming blunt fingers pivotally mounted upon a support member; means guiding said support member for rectilinear movement toward and away from the article to be formed; means to advance said support member; means pivotally connected to said fingers for oppositely turning said fingers adjacent the advance limit of movement of said support member into engagement with the article to be formed; and means for simultaneously retracting said support member and said latter means at different speeds to reversely turn and withdraw said fingers out of engagement with said article.
33. A roll forming mechanism comprising: a support having an opening therein for receiving the edge of a mattress; a link mounted on a fixed pivot on said support; a roll forming element pivotally mounted at one end of said link; a second roll forming element mounted on a fixed pivot on said support adjacent said opening; a pair of links pivotally connected together at a common pivot at one end and pivotally connected to said r011 forming elements at the other re- UNITED STATES PATENTS spective ende of sa1d pair of linl s; and mova b1e Number Name Date miaans cam'mg sald for tummg Re. 16,555 Collett -1 "Feb. 22, 1927 Bald fingers- 542,289 Stephenson July 9, 1895 JAMES A, CASH 5 1,300,139 Dr011 Apr. 8, 1919 JAMES CASH, JR 1,481,994 Droll Jan. 29, 1924 1,519,299 Droll Dec. 16, 1924 1,520,317 Stoneback et a1. 1 Dec. 23, 1924 REFERENCES CITED 1,591,115 Dubick July 6, 1926 The following references are of record in the 10 1,943,280 Arnold Jan. 16, 1934 file of this patent: 2,1 ,251 Goldberg Jan. 2, 1940 2,446,150 Wood July 27, 1948