US 1572439 A
Description (OCR text may contain errors)
Feb. 9 1926. v
L. E. LA BOMBARD ET AL TIMED FEEDER Fil ed June24. 1922 2 Sheets-Shee't 1 A 7' TJAWEY.
Feb. 9,1926. 1,572,439
L. E. LA BOMBARD ET AL wimp 1321112511 Filed June 24. 1922 2 Sheets-Sheet 2 Patented Feb. 9, 1926.
*gffU NITED STATES.
fnon a. LA BOMBARD AND MELVIN'H. SIDEBOTHAM, OF CHELSEA, MASSACHUSETTS,
ASSIGNORS To SPECIALTY UTOMATIC MACHINE COMPANY, or CHELSEA, MASSA- OHUSETTS, A CORPORATION or MASSACHUSETTS.
TIMED Application filed June 24, 1922. Serial No. 570,697.
To all whom it may concern:
Be it known that we,LnoN E. L Bowman!) and MnLviN H. SinnnoTHAM, citizens of the l nited States, and residents of Chelsea, in
@ the'countv of Suffolk and State of Massachusetts. have invented certain new and useful Improvements in Timed Feeders, of which the following. is a specification.
This invention relates to mechanism for 0 -'.letaching blanks or sheets from the bottom ofa pile, and advancing .them singly toward other mechanism for further treatment. such mechanisms being known as bottom feeders, and the invention has particular reference to mechanism, for detaching and advancing the blanksin spaced relationship. Devices or mecl'ianisms .of this type are commonly known as timed feeders because they are usually employed for feeding the blanks to secondary mechanism which operates on predetermined longitudinal portions or areas of the blanks and which, therefore, renders it necessary that each blank shall reach said secondary or treating mechanism at a certain time in the operation thereof.
Feeders which successively push blanks from the bottom of a pile have a tendency to start more than one blank forward. To overcome this tendency is one of the objects of our-invention. In attaining this object we provide for slightly lifting the pile of blanks while the bottom blank is being pushed forward to be engaged by" forwarding mechanism, thereby effecting the primary result of elim nating or re ucing friction between the under surface of the bottom "blank and whatever stationary supports are employed for the pile, and the secondary result of reducing liability of a second blank starting, with the bottom blank, into the throat or passageway through which the blanks must pass singly from the hopper.
Another object of the present invention is -to provide a-bottom feeder capable of succ'essively operating on blankswhichare not of uniformthickness, or'which have something else attached thereto such as the'tape 'handles attache-dto the blanks for making ice-cream pails.-
Another object is to provide-improved throat mechanism for alternately opening and closing the passageway for the blanks leaving the feeder.
With the above and otherobjects in view,
the invention consists in the construction and combination of parts substantially as hereinafter described and claimed.
Of the accompanying drawings Figure 1 is a perspective view of one of our'improved feeders in one of its embodiments.
Figure 2 represents a longitudinal section of the same.
Figure 3 is a detail plan view of one of the lfiting and feeding disks with an adjustable peripheral mounting or hump.
- Figure 4 is a view similar to a portion of Figure 2 but showing a. modified and some-- times preferred form of the front rotary member at the exit throat.
While the feeder herein described and claimed is capable of use in connection with various kinds or types of machines for treating the blank fed, such as the making of envelopes or the printing of sheets, it has been designed especially for use in connection with machines for making egg boxes .suchas illustrated in our application Serial No. 442,868, filed Feb. 5. 1921.
Inthe drawings, portions of the frame are indicated at. 12, the side portions being connected by a slotted cross bar 13 and one or more tie rods. Mounted on a rod 14 and adjustable longitudinally thereof are two brackets 15 each having an upright wall plate 16 secured thereto.
Extending along and secured to the lower edge of each wall plate is a bar 17 the other ends of the two bars being supported by a fixed cross bar 14:" (Fig. 2). Theupper surfaces of the bars '17 provide ledges for the marginal portions of the lower blank of a pile. One blank is indicated by dotted lines in Figure 1.
having strips 19 extending parallel 'with the bars 17 and level with the-ledge surfaces thereof.
For the reasons explained hereinafter we prefer, for some purposes, that the ledges 17 and floor strips 19 shall not be mooth i but shall be super-frictional. They may have rubber surfaces or may be roughened in any suitable, manner as indicated Figure 1.
Either rubber or roughening provides extra or super-frictional resistancetoany move- I i i ment of blanks resting thereon.
\Vhen the blanks to be fed have-- irreguldr edges so that the side plates 16 can not be 're- 'lied upon to hold the pile properly, we embottom blanks to successively pass them.
Adjustablysecured to the shaft 29 are the of the pile of blanks in the hopper.
Mounted in bearings on the frame are three .shafts 24, 29, which are driven continuously and synchronously by power and through gearing not neiessary to .illustrate. Secured to the shaft 24 is a rotary member which may be awheel 25. as in Figures 1 and 2 ora segment. 25 as in Figure 4; Said rotary member has a friction peripheral surface or surfaces: such as rubberplugs 26.
A roll 27 carried by shaft 28 is driven at the same peripheral speed (but in opposite directions) as that of the wheel 25 or segnlent '25" to ensure the advance of the blank fed under the gate strip presently described.
hubs 30. offltwodisks' 31 *Each disk has a portion off its periphery" raised. 1 In other wordseacli-f dis is cam shaped,.1ts higher ortion what is hereinafter rerred to asahumpi; Preferably but not necessarily it'icomprisestwo plate members 33. go
.(F-ig.-.3)"tineQ-of which is securedkin fixed [position onthe, periphery. of the disk and asa recessto receive atongue portion of I the other member which is slotted and has a .5 1 set screw 32 Ijfpassin'g through it into the as disk.
' By'loosenifig the set screw 32, shifting the longitudinal position of the member 33 which has -the" tongue portion, and then tigliteningjsaidscrew, the effective length of the hump'j may beflvaried when conditions hereinafter "explained require it. Figures 2 and 4 do. not=allustrate this feature because 'we do not limit'ourselves to machines which .include it.';-
Snrrounding and tightly fittingeach disk 31 1is' a bandc34 of. rubber or other suitable 'mate lfialeto'fi'ictidnally en'ga e-the lower or;
bottom blank ofa. pile in te hopper and- W under the car of the gate strip. A second Secured to the shaft 355is the hub -36 of a .efiect edgewise movement of said blank.
third glisk 37 l iav ing a peripheral-- liump plate or support 39and a-surrounding fric-v all three: are practically alike in structure.
The lower ends of the 1 As best illustrated by Figure 2 the three cam shaped disks with their higher portions forming humps are of such size and are so mounted and driven that, when revolving in the direction of the arrows, only those portions of the friction bands which extend overthe humps will touch the bottom blank of a piles This is because the normal sup-- port for the pile comprises'the ledges 17 and (when used) the strips 19 which are at a height above the axes of the shafts 29, 35,
less than the radius which includes the humps and greaterthanthc radius not ineluding the'humps. ,In other words, the pile is alternately lifted and lowered relatively to the normal support for the pile and the bottom blank is urged forward during such lifting by the portions of the fric describe.
A vertical bar 41 having slots 42 through which screws 43 pass into the cross bar 13 constitutes an abutment for the front edges adjusted to provide a wider or narrower passageway'according :to the thickness of the blanks or sheets to be fed. I
Mounted to slide in a suitable vertical guideway of the bar 41 is a gate strip 44 the lower end of which, when said strip is not lifted, extends below the tip of the bar 41 to obstruct the passage of a blank. Sccured to and rising from a lateral ear of the gate strip 44 is a pin 45 guided in a lug or block 46 carried by the bar 41. A spring 47 coiled around the pin 45 and confined be tween the lug 46 and the ear of the gate strip acts lightly to'tend to hold the gate strip in its lower, closing, position. Said gate. strip is lifted intermittently to open the passageway for a blank, by an arm 48 of a rock shaft 49, said arm 48. extending to hold the arm 50 in contact with the cam.
The spring 53.is of sufficient strength to overcome the resistance of the spring 47 and Its that the bottom blank is free effect any feeding, said efi'ect lifting of the gate strip when the end of arm 50 is bearingon the low portion of the disk 51. When the cam lifts the outer end of arm 50. the arm 48 is lowered and the spring--17 slides the gate strip 4a down.
In operation, assuming that the lateral positions of the strips 20. have been' adjusted to suit the shape and size of the blanks to be fed, and that the disks 31, 37, have been laterally and rotatively adjusted on their shafts to cause their friction humps to properly engage the bottom blank of a pile, the timing of the relative operation of the parts is such that just asthe gate strip 44 rises the friction humps begin to act, lifting the pile so from the extra or-super-frictional retarding effect of the normal supports 17, 19. As the humps move forward they start the bottom blank through the gate or passageway and saidblank is grasped and aided in its forward movement by the coaetion of the driven roll 27 with the wheel 25 or segment The lengths of the bumps is considerably less than that of the blanks so that when the disk 37 and its hump 40 ha; rotated far enough to cease to act on the bottom blank or, in other words, when the rear edge of the bottom blank has passed beyond the point where the said hump it) acts upon it, the weight of the pile causes the rear portion of the next blank to settle down on the normal support 17, 19, the super-frictional engagement of which prevents a second blank from being dragged along by the one which is passing out under the gate strip. As soon as the rear edge of the moving blank passes beyond the point where the humps of the disks 31 act upon it, all feed ing tende cy ceases until the humps again reach about the positionsshown in Figure 2.
The described adjustment of the humps as to length (Fig. 3) when the structure therefor is employed is to provide for prop erly acting on blanks of different length.
Since only portions of the friction bands 34, 40, are at suflicient distance from the axes of rotation of the portions constitute a friction feeder to act on successive lower blanks of a pile in the hopper. The rotation of the disks carrying these friction humps causes their operative height to be intermittently varied relatively to the height of the normal super-frictional support 17, 19; thereby reducing or eliminating retarding friction during feeding periods,
An important function of this structure is. that it reduces liabilityof the second blank the one next above the bottoin blank) being forced into the outlet below the gate strip t by the friction of the bottom one which is being fed out. fact that 'thehumps are adjustable in length wall plates 16 and guide extend back over shafts 30, 36, to.
This is due to the to meet requirements. In Figure 2 the front and rear humps are indicated as of substantially the same length, but it will be readily understood that the humps 33 of the front shaft 29 maybe increased in length and the hump 39 of. the rear shaft 35 may be shortened either by shifting lengthwise the member having the tongue (Fig. 3) or by entirely removing that member. Then when the blanks being all of the humps, the rear edge of the bottom blank will pass forward beyond the rear hump 39 and result in permitting the rear portion of the next or second blank to be pressed down, by the weight of the pile above it, onto the super-frictional surface of the normal support 17, 19, whereby said second blank will be held back while the forward humps 33 are still exerting a feeding action on the bottom blank. This enables the maximum feeding action to be exerted on the lower blank and the maximum retarding action to be effected on the second blank, such action continuing successively on the blanks as each'bottom one is entirely fed out.
The cam 51 is so formed and timed as to its operation that the gate strip 4*]: is free to des end before the rear edge of the fed blank 1:-a;se..;.out. In other words, the lower end of the gate strip bears on thesurface of the rear portion of the outgoing blank and as foon as the rear edge passes out, the gate strip drops and does not rise until just as the humps begin to act on the next bettoul blank. ltv this mechanism we ens'zre al's .liitc uniform ty of the spacing between succesdvely fed blanks to enable each blank to reach position for treatment such as folding or printing without having another blank so close to it as to interfere with said treatment. .For these reasons'the mechanism is especially adapted for use in connection with machines whichtt'reat the blanks while briefly held in arrested positions, such as explained in our application hereii'ibefore referred to.
It is to be understood that Figure 3 illustrates a structure of adjustable hump plates suitab'e for all three of the disks 31, 37, altlaiugh Fig-tires 1, 9 and 4 do not illustrate the humps as adjustable. ing eir h by means of two members, we-may provide single segmental plates of different. lengths and substitute or interchange sizes to Fllli' the. blanks to be fed.
lVhen the blanks to be operated upon are plain flat ones, without attachments, a feed wheel having a complete circular periphery such as shown at in Figure 2 is usually pro feral le. 'ith such a wheel however difs ficulti is experienced if the blanks have attachments- (such. as the tape handles of ice cream pail blanks) or if'the blanks have (tire to partial preliminary folding or fed are of such length as to Instead of form otherwise) doubled or extra-thick portions. Such tape or extra-thick portions are liable to catch uponthe gate strip or choke the/ outlet throat. lVe have discovered that by cutting away a part or parts of the wheel under the gate strip, so as to provide a recess' capable of receiving such tape or extra thick portions, blanks of the kind referred to can be accurately fed. In such case the blanks are stacked in the hopper with singlethick edge portions against the abutment member 41, the tapes or extra-thick portions being at" the rear. Then, by the time each blank has passed far enouglr to be under the control of the usual forwarding mechanism of the machine to which the blanks are supplied by this feeder, its tape or extra thickness will be accommodated in the cutaway or recessed portion of the wheel so as not to catch. In Figure 4 we have illus-' trated such a wheel as cutaway to .such an extent as to leave practically a segment 25*. Obviously however the cutting away need not be so extensive. .In effect the. member 25*- is a wheel with a Very extensive recess. Y
As hereinbefore stated, feeders ,which successively push blanks from the bottom of a pile have a.tendency to start more than one blank forward. If two or more bla ks so start, their front edges become wedged edge of the lower blank.
under the restricting abutment such as that illustrated at 41. To aid in overcoming this tendency we provide means for slightly withdrawing the pileof blanks, or causing said pile to retreat, just as or immediately after the bottom blank is advanced. It is particularly desirable to do this when the blanks have tape or other attachments or have extra-thick portions as hereinbefore described and when for this reason the feed wheel under the abutment is cut away .or recessed. To illustrate this, assume that the se mental member 25 (Fig. 4) moved ar enough in the direction of the arrow to no longer all'ord any support r the front Unless the blanks are very stiff, the front edges of two or more would be liable to drop down so that as said 1 member moves up toward the position shown in-Figure 4 said edges would. become, wedged under the abutment 41.. Toeifect; the .retreat or slightdrawing back of the pile at 'the proper times, we provide the following mechanism :The rod 14 is supportedby arms 55.
rock shaft 54, the latter having anoth fr arm 56 actnated by a cam 57 on the shaft-.35, The result of this structure is that as soon as the bottom blank is advanced far enough to expose any portionof the-undersurface at the rear of the next blank, the friction supports 17, 19, act on that exposed portion to draw it back. By the employment of the side aiding devices for the blanks of a pile to hold them squared up, preventing any from becoming askew. v By the term blanks used herein we do not mcanflto limit ourselves to any particularshape or kind of material. The term is intended to apply as well to sheets of any kind to be fed to box-making machines, printing presses, or other machines which treat or operate upon them.
Having now described our invention, we claim:
1. A blank-feeding mechanism including a normal support fora pile of blanks, said support being surfaced to 'fric tionally retard blanks, a friction feeder to act on successive lower blanks of the pile, and means.
surface, a friction feeder to act on successive lower blanks of the pile, and means for intermittently varying the relative height of said normal support and friction feeder to reduce the retarding effect of the normal support when the feeder acts on each lower blank.
3. .A blank-feeding mechanism including a normal support having an extra frictional surface for a pile of blanks, and a friction feeder. to act on successive lower blanks of the pile, said feeder including forward and rear intermittently operating members timed to cause the rear member to cease opcrating and permit the rear portion of the second blank of the pile to engage said extra frictional surface while the forward,
member continues to feed the bottom blank.
' 4. A. blank-feeding mechanism including a normal support having an extra frictional surface for a pile of blanks, and forward and rear rotarymembers having raised frictionfeeding surfaces timed in operation to cause the rear member to cease feeding and permit the rear portion of the second blank to feed the bottom blank.
5. A blank-feeding mechanism including a normal support having an extra frictional surface for a pile of blanks, africtiqn feeder to act on successive lower blanks ofthe pile,
means for intermittently varying the rela-' tive height of said normal support and friction feeder to reduce the retarding effect of the normal support when the feeder acts on each 'i-llower' blank,
6. .A blank-feeding mechanism including and an intermittently lose'dfand opened gateway forthe passage of the --lower blanks.
.strips 20 we-pr'ovide" adjustable" registering of the pile to engage said extra frictional surface .while the forward member continues a normal support having a super-frictional surface for a ile of blanks, and a friction feeder intermittently movable toward and i from the lower blank of the ile.
7. A blank-feeding mechanism including a normal support having a super-frictional surface for a pile of blanks, a friction feeder intermittently movable toward and from feeder in timed relationship.
' v the lower blank of the pile, a gate-controlled passageway for successive lower blanks, and means for operating the gate and friction 8. In mechanism of the character described, a hopper for a pile of blanks, and means for simultaneously lifting and feeding out the lower blank of the pile, said means comprising a plurality of rotary disks havin friction humpswhichare adjustable in ength.-
9. A blank-feeding mechanism comprising a hopper for a pile of blanks, means for or space to receive and permit the free pas sage of an attachment to. a blank or an ex-' feeding blanks successively from the pile,
andjmeans forming an outlet passage-way for a singleblank at a time, said passageway formin means comprisin a recessed rotary mem er and a gate strip cooperating therewith.
10. A blank-feeding mechanism comprising side guides for a pileof blanks, a. friction feeder to act on successivcilow'er blanks of the pile, a rotary memhe overwhich each of said lower blanks passes, and afgate member cooperating with saidrotary member in forming an outlet for said passing blank,-said rotary member having a recess 4 tra thick portion thereof.
11. In a blank-feeding mechanism having a hopperfor apile of blanks and means for feeding blanks successively from the bottom of the pile, a pairfof laterally adjustable vertical blanks, t e lower ends of said guide strips being spaced above the bottom of the hop- 1 on single blanks of the 'de strips for'side edges of the per to permit laterally projecting edge portions of the blanks to pass under the stri s,
for a single blank at a time from the bottom of the pile, and a plurality of rotary friction feeders below said support and located at different distances from said outlet, each of said rotary feeders having a cam-shaped peripher the higher portion of which is adjustab e in length, whereby movement of the lower blank through said outlet may be continued by the action of a feeder near the outlet after a portion of the next or second blank restsnpon said stationary frictional up ort.
14. A b ank-feeding mechanism including a normal "su port for a pile of, blanks, a friction fee er to act on successive single blanks of the pile, said feeder being constructed and arranged to shift. from a plane below'the normal support to a plane above it, andmeans for intermittentlyretracting the saldsupport.
15. A blank-feeding-mechanism including a normal support for a pile of blanks, a mtary recessed member for acting successively ber cooperating with sa1d rota ry member in forming an outlet for the blanks, and means for intermittently retracting said support, v.
In testimony whereof'we have aflixed our signatures.
' LEON E.
Lvm; H. SIDEBOTHAM.
ile, a gate mem-