US 2007209 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
W. J. NEIDIG FOLDING MACHINE Juiy 9, 1935.
3 Sheets-Sheet 1 Filed July 10,1929
In ve 1:1 tor:
w fmm- 7m%. #1
July 9, 1935.
w. J. NEIDIG FOLDING MACHINE Filed July 10, 1929 Z Sheets-Sheet 2 .I/IIIIIIIII/IIIIIIIIIIIIIIII Inven L01:
Witnesses Jul 9, 1935. I w. J. NElDlG 2,007,209
FOLDING MACHINE Filed July 10, 1929 3 Sheets-Sheet 3 gasses: 0
WM W L 0 Patented July 9, 1935 OFFICE 1 FOLDING MAomuE I William Jonathan Ill,
- Application July 19,- '1929, Serial No. 377,255 zsclaims; (cit-10 6s) The invention relates to mechanisms'designed to fold sheets'of cut paper or similarjmateiial, more-especially sheets of varying size, such as commonly require the-folding mechanism .tobe frequently adjusted, as in usual commercial job folding or oflice folding.-
The invention comprises anumber of features novel'in' the art. These include a novelunode of operation,'of:especial advantage insome uses V is because of the ease with which the position on the sheet of longitudinal folds maybe varied, including the usual parallel folds employed in folding letters or the like. This aspectof the invention is illustrated not only by the embodie' ments described herein, but by the related em bodiments described and specifically claimed'in my United States Patent No. 1,838,106, dated December '29," 1931, and' infmy co -pending applicae tion, Serial Number'582,l42, filed December-19, 193 1, the latter containing a clear explanation of the relationship existing between theseseveral embodiments, although the invention is notlim ited to'thes'e" embodiments; 1 j Other features of the invention are likewise further illustrated in these related embodiments; in some cases by specificwariations that are specifically claimedin the said patent or said co-pending application. These include *novel gated constructions useful in various paper fo1d-' ing; forwarding", pressing and discharging opera tions. They also include novel adjusting means, to facilitate changing the position of certain folds upon the sheet. j v The invention includes a-novel' gated construction useful in entering sheets intended to be passed through the first-stage folding mechanism' without being'folded thereby. I The general objects of my=invention are. to supply an improved foldingmechanism fofjob and ofiice folding, embodying such of these features as may be found desirable for the usein mind, thereby enabling the operator to make quicker and more convenient adjustments, and
r to make these even while the'maohineis run- 'ning, andwithout the'possession of 'anyfl'great skillon his part."
I attain my several objects by the mechanism illustrated in the" accompanying drawings, in which-' Figures 1 and 1 constitute together an end view of one of the embodiments of myinvention,
Fig. 1 being a continuation; downwardly of Fig:
1, the sheet being shown advanced to a posidirection f its movement; Fig. 2 is a diagrammatic view looking downward, on the line A A, showingthe transverse position ofthe sheet at same, stilllooking downwardon the line A-A, after the sheet has been slightly advanced, showing theforming upward it has received from that time; Fig. 3 is a diagrammatic view of the a right-hand and left-hand forming members; Fig.
'4i is a detail viewof the same, showing the construction of certain of said members; Fig. 5 is a view looking downward on the, line B-B, but with the sheet still further advanced; Fig. (i is what would correspond to a plan view of portions of Fig. 1 if the down-standing mechanism wereshown in horizontal position, the left-hand and right-hand membersthereof corresponding to thelft-hand and right-hand members. of Fig. 5;"Fig. 7 is a; detail view, partly brokenaway, of a transverse folding roll shown in Fig. 1; Fig. 8 is a View looking downward on the line C C, Fig. 1, showingc'ertain details of construction; Fig. 9 is a View in section of the transverse folding rolls shown in Fig. 1; Figs. 10, 11 and 12 illustrate diagrammatically the action of'a recessed'transverse folding roll when the sheet is required to be entered without receiving the transverse fold; Fig'.i13 is an end view of a modificationjof the mechanism shown in' Fig.7 1; Fig. 14' illustrates details of construction of the same. In the embodiments of the invention shown in the'idrawings use is made of a usual folding knife I, attached upon arms 2, which are in turn attached upon shaft 3 journaled in end frames 4. The knife may be operatedin any approved mann'erf in the drawings it is operatedby a gear 3 wheel 1 having attached upon it a earn 8, through camf roller 9 on'arm 2. v The cam strikes it down-% wardly in such manner as to carry a sheet lying across its path into the bite of transverse fold ing'rolls 5 and 6,".spring-pressed together, which thereupon pull it between them. Said rolls are connected-with toothed wheel 1 through toothed wheel- I! and means later described, and are rotated thereby an even number of times for each revolution of wheel, "I. The knife may be re-v turned into the position shown by usual means; such as spring action.
I depart from common practice in the. construe-,- tion of foldingrollsi and 6 by Supplying either one or both with a longitudinal recess :2. The
purpose of the recess is to act as a kind of gatewaypermitting'the knife to introduce diflicult stock between the said rolls, such as thick stock or stock already folded or stock having a finish difilcultfor the rolls to grasp. The action is shown clearly in Fig. 9. The recess construction can be used also to soften the fold to resemble the fold done by hand. It also facilitates the withdrawal of the knife, rendering its use with small rolls less exact in depth of stroke. It also facilitates the entering between the rolls of an unfolded sheet-edge. By using a recessed roll the sheet can be positioned forwardly as in Fig. 10 to a point permitting the leading edge when bent downward by the knife to reach the point of closure between the rolls. If a roll is used not supplied with a recess, either the downward-carried end of the sheet will meet with interference.
from the roll and receive a fold, or the sheet must be advanced after the end of the-sheet is carried past the contour of theroll. ,In either, case the sheet is not very certainlyentered. It will be understood that some uses ofmy invention will not require such a recess, and in such cases it will not be employed.
It will be noted that I prefer to employ a roll or rolls constructed like that shown in Fig. 7, in which the recess or gateway l2 does not extend quite to the end'of the roll, thepurpose of such construction being toenable the solid or unrecessed ends of the roll toact as bearers, so that v the revolving rolls will run smoothly together, in-
stead of being spring-pressed into a trough at each revolution, but I do not limit myself to any precise means of controlling their approach to each other.
It will be noted also that the use of such a recess does not materially affect the action of said rolls in their function of sheet-advancing means, since the width of the recess is too slight to affect the progress of the sheet materially, and such effect as obtains is exerted evenly, and furthermore, before the roll completes a revolution to present the recess again to the sheet, the leading edge of the sheet will have passed upon sheetadvancing wheel 4|, to be described later. The progress of the sheet may be regarded as con tinuous, in such a case, and is so in fact.
Folding rolls 5 and 6 just described are carried upon shafts l3 and I4 journaled in end frames 4. Attached uponsaid shafts are gears, 15 and I6 meshing together, connected through gear l1 with gear 1, journaled upon pin III, which is driven by gear IS on shaft 20, journaled in end frames 4.
The mechanism described is that which I prefer to employ for making a transverse fold, that is to say, a fold at right angles to the'direction of progress of the sheet. I will now describe the means shown in the drawings. for making one or more parallel folds. 'By'afparallel fold I mean a fold parallel with the direction of progress of the sheet, and not necessarily one parallel with another fold. e
I prefer to use sheet-advancing means giving the sheet a substantially continuous progress, and folding means operative while the sheet is moving, although I do not in all cases limit myself thereto. l
I prefer to use revoluble means for making said one or more parallel folds, but the invention is not limited to revoluble means. i In the embodiments of my invention shown in the drawings I employ means for making two parallel folds, said means being revoluble, and operating while the sheet is in motion. one of said folds, that made by the mechanismarbitrarily shown inFig. 5 and other figures as positioned at the left-hand side of the drawing, will be referred to hereafter as theileft-hzind fold, and
the mechanism making it as the left-hand folding unit. The other of said folds, made by the mechanism arbitrarily shown in said figures as positioned at the right-hand side of the drawing, will be referred to hereafter as the right-hand fold, and the mechanism making it as the righthand folding unit. The two folds are made independently. Either may be begun first and either completed first. In the present embodiments they are begun simultaneously; but the right-hand fold is shown as completed first, and the left-hand as lapping thereover and completed last. It will be noted that either the left-hand or the right-hand fold may be made alone, using the mechanism shown in the drawings, at the will of the operator.
The left-hand folding unit, shown in end view in Fig. 1, will first be described.
The framework of said unit consists of two similar frame 'pieces23, held at a suitable distance apart by shouldered stays 25. The right-hand folding unit employs a similar framework. Frames 23 are suspended slidingly at two points upon transversely extending guides or rods 24, attached at either end upon end-frames 4, in the case of both units. An upwardly extending frame extension 52 is supported on frames 23 by means of shouldered stays 53 in both cases, from the nearer side or end-frame side in the case of the left-hand unit, and from the further or end-frame side in the case of the other.
Journaled in said frames 23, both of the lefthand folding unit and of the right-hand (see Figs. 1 and 1 are the short shafts 26, 21, 28, 29, 30, 3| and 32, and a longer common drive shaft 20, previously described as journaled also in endframes 4. Said shaft 20 contains a keyway 35 running longitudinally thereof, adapted to receive a sliding key 34 attached upon a sliding miter gear 36 in the case of both units. Miter gear 36 meshes drivingly with miter gear 33, attached upon shaft 31, which is journaled at 38 upon frame23. Miter gears 39 attached upon said shaft in turn mesh drivingly with miter gears 40 attached upon shafts 26, 21, 28, 29, 30, 3| and 32. Similar driving means between said shafts and drive shaft 20 are employed in the mechanism of the right-hand unit. It will be understood that the several toothed wheels shown in the drawings are of related dimensions so as to give the parts driven thereby a timed operative relationship. Thus in the drawings rolls 5 and 6 are geared to rotate six even times for each revolution of toothed wheel 1, and therefore for each stroke of knife I, and shaft 20 and its supported wheel 4|, and the gear-driven revolving parts on separable frames 23, including wheels 42, 44, 46, 48, 49, 50, 6 0, 62, 64, 65, 66 and B1, are geared to rotate three even times for each revolution of toothed wheel 1. The construction described has for its purpose the maintaining of a timed relationship between the operative members of said units, and between said units and the mechanism previously described. It is chosen for its convenience. Other connecting devices for the purpose are shown in Fig. 13. The invention is not limited to any of these;
The revoluble members more directly concerned with the folding operation, as shown in the present embodiment illustrated in Fig. l, in most cases havea plurality of functions, divided between sheet-advancing, forming, guiding and controlling the sheet, and laying down the completed fold.
v The flrstof these to be described is wheel 4|,
' slightly in their, timing, and
which is keyed slidingly upon. shaft 29land'islides with frames 23 thereon,xmaintaining.'meanwhile its lateral position with respectiitoirsaid frames; Its functionis. to vadvanceand control the sheet, or assist in doing. so, cooperating with spring wheel 58, to be describedlatenand othersheet controlling members; The right-hand unit is suppliedwith a similar wheel, similarly connected. The second ofv thesemembers to be described is wheel t2, attached upon shaft 26. It is supplied at the folding line with a folding. or forming flange 63, said flange being partly cut away, the
open portion acting as 'a kind of revoluble gate way to permit the leading edge-of the sheet topass upon the sheet-advancing portion of said' wheel time, the. chance of displacement being thereby lessened. Wheel 44 is attached'uponishaft 21. It too is supplied with a forming flange, in'di' cated, at 45, that is partly cutaway in a gateway, to permit the leading edge of the sheet to passflhpon the sheet advancin'gportionf said wheel in advance of action by the flange. By employing such gated means the sheet ,is securely held by both wheels during the forming action of the flanges. Wheels 42 and M and their driving connections are repeated in the right-hand folding unit, except that flanges 43 and 1-5 are in right-hand position with respect to said wheels, rather than in left-hand. 1
Up to this-point both the right-hand and left.- hand units act simultaneously in forming up the sheet along the folding line; but inasmuch as the right-hand unit completes its fold in advance of the left-hand, from this point the revoluble members mounted opposite each other differ action. a i
I will continue to describe the left-hand unit;
Wheel Mi thereof, attached upon shaft 28, isfsupplied with a continuous flange A? in line with the flanges previously described, that. is to say, on the operatingjiri the right hand folding unit, and a further similarwheel 48 upon shaft 28 opposite wheelAfi-(Fig. 6). These wheels extend beyond the folding line in each case, so as to serve as bearers to support cooperating'wheels 69,6! and 62, on the left-hand unit and wheels 64,. E5, 86
andGl on the right-hand unit. Wheels iiiLxSi, 52, 66 and E? are driven respectively from shafts 29, 30, 3E, on the left-hand unit, and129 and 28 on the right-hand, through miter gears 8,
one member of which is attached to said shafts and the other to rip-standing axles i 33 with which said wheels are supplied, said axles being journaled in an extension of frame 23. Wheels 64 and $5 on the right-hand unit do not require a timed drive, but are driven by friction by the 7 wheels upon which they rest; The timed mem- 'upat the folding line.
therefore n their folding units suspended thereon.
wheels without being acted upon foldingly, somewhat in the manner described in connection with wheels 42 and :44. Said members extend past the folding line in a position approximately horizontal to the sheet, except where they are gated l.
or cutaway, and are spring-pressed downwardly upon the wheels shown as cooperating therewith (Fig. 6) by means of springs 69 (Fig. 5), as are also the untimed wheels 64 and 65, which merely act sealingly upon an already completed fold an assist in advancing the sheet. I Other cooperating structure will now be described Frame extension'EE, already referred to, has attached upon it an inwardly extending member 54, supported at the inner end by .yokepiece 55 sliding upon'shaft 56, said shaft being attached at eitherend mend-frames Me. ber 53 serves to support piece 51 attached upon it, in whichare journaled spring-pressed wheels 53, each supplied with an axle 59. The spring pressure is conveniently supplied by making said wheels of a resilientmaterial like thin spring steel. I. The purpose of the said wheels is to hold the sheet against wheels ti, 4? and M, soas to cause it to partake of their movement, and to act as a support over which the sheet is formed I prefer to employ a revoluble support such as this behind the forming up means, but stationarytongues or guidestraps iii, attached upon piece Bl by means of blocks H, act to some extent as a support over which the sheet is'formed up. Said straps are preferably made of smooth spring steel. Th y are shown in Figs. 4 and 6 as recessed over the apex o f the several wheels engaging the sheet so as to avoid interference therewith. i It is-to be noted that the edges of such recesses are slanted away sharply so .as to act guidingly uponthe 1 leading edge of the formed-up sheet without obstructing its progress. 1
Other forms of wheels having the functions of wheels 56 are shown in Fig. 13, and other forms of spring pressure engaging said wheels with the sheet. The invention is not limited to any particular form of either. I To assist in supporting the sheet in its plane of movement I attach a support or paper table 185 upon frames Q23, said paper table being pierced to permit-the various revoluble members with which-it would interfere to project through it. I also attachlan intermediate paper support i536 upon rods2 i, at a point midway between the Whatever the lateral position of said unitasaid paper support will lie midway between them. ,1 i
It will be understood that the structure just described, with the exception of midway. paper support 35, is described also with respect. to the right-hand folding unit.
The stacking means shown in' the drawings is no part of my invention, which in practice will use any approved stacking means found most useful. As shown in the drawings.
Shaft 32, driven as described, has attached upon it bevel gear 12 meshing with bevel gear 53 on u'pstanding shaft i i, journaled in frame ex,- tension 15; ShaftM is preferably. positioned near the folding line. Carried upon it bymeans of an attached collar is helical member l6 that extends past the folding line in contour, said member being :shaped and timed to present an uninterrupted opening or gateway to the leading edge or'end of the folded sheet. In thedrawings,'it isshownturned in gatedposition, ready to act liftingly upon such a sheet. The sheet is brought to a stop by tray 11. Upon the further revolving of said helical member the sheet is lifted out of the paper path against the sheets previously folded, indicated at 18. A side guide 19, like tray 11 attached upon frame 23, cooperates in holding the folded sheets in convenient position. The tray and guide "will have any desired capacity, and after they are filled the folded sheets may pass out upon a table top or other receptacle. Guide 79 may be constructed to bear lightly against the sides of the folded stock. Said structure is repeated in the righthand unit.
The right-hand and left-hand units described are slidable laterally upon supports 24 both with respect to end frames 4 and with respect to each other. Their separable relationship is provided in order that the operator may vary the relationship of his parallel folds. It will be noted that they may be separated to an extent permitting the passage of a sheet upon them without folding. In practice single folds made transversely are often required. It will be noted also that they can be made to act foldingly along a single parallel folding line, instead of a double. Such use is also frequently required in commercial practice.
Said separable folding units are preferably held in lateral position by means of the following devices:
' Extending transversely between end frames 4 and journaled therein are threaded shafts 80 and 8|. The threaded portions of said shafts are preferably given a right-hand thread upon one side of center and a left-hand thread upon the other. Said threads correspond in pitch in the case of both shafts. Said threaded shafts engage suitably with threaded holes in frames 23, both on the right-hand and left-hand units, so that when rotated similarly either shaft will give the respective units the same lateral movement. I secure identical rotation for said shafts by attaching upon each a sprocket wheel 82 identical in size and connecting the two by means of chain 84. A hand wheel 85 attached upon shaft 8| furnishes a convenient handle for rotating the shafts.
As will be seen, said adjusting means will act always to preserve the parallel relationship between the right-hand and left-hand folding members without care on the part of the operator. As will be seen also, the use of said adjusting means will not in any way affect the folding action of the units. In commercial practice this will be found a great advantage.
The action of the mechanism will be described when folding a common letter. The sheet to be folded, indicated later at HJl, is laid in position across the transverse folding rolls 5 and 6, knife I carries the same between said rolls, the sheet is folded thereby, and it is then advanced to the position shown in Figs. 1 and 2. A moment later flanges 43 and 45 act synchronously to form up the sheet as shown in Fig. 3. Upon being further advanced the sheet is acted upon by gated sealing wheel 51 (Fig. 6) of the right-hand folding unit, and the right-hand upstanding portion is laid down thereby. The left-hand upstanding portion remains standing during said action. A further advance presents the leading end or edge of the sheet to gated wheels 60 and 69. Wheel 69 of the right-hand unit immediately proceeds to complete or seal the right-hand fold, but gated wheel 60 of the left-hand unit permits the upstanding left-hand fold to remain as it isfor the moment without being laid down or sealed. Said upstanding portion of the sheet is carried forward past gated wheel 6| without being acted upon and the leading end presented to the recess in gated wheel 62. The purpose of the delay is to permit the right-hand fold to be securely laid down after the trailing end of the sheet has passed the interference of wheels 58 and their supports. The sheet during this time is advanced by the right-hand sheet advancing members, and. it is guided by tongues or guides 10. Upon arriving at gated wheel 62, however, wheels 60, GI and 62 simultaneously act upon the upstanding sheet to complete the fold thereof, laying it down upon the right-hand fold already completed. The folded sheet is then still further advanced until its leading end is presented to the opening or gateway in the timed helical member 16, and it is brought to a stop by tray 11. Helical member 16 thereupon acts to raise it from the paper path and add it to the stacked sheets already folded.
The modification shown in Figs. 13 and 14 has a similar action; but instead of employing two suspended folding units the nearer or left-hand unit is fixed with respect to the end frame. Tilted wheels 58 are replaced in this embodiment by wheels 90, spring-pressed by the thinner resilient portion 9| of their support against the gated flanged forming wheels already described. In this embodiment a further forming wheel 92 is added to the series, so that three wheels act fcrmingly upon the sheet in synohronism instead of two. The drive in this case makes use of sprocket wheels 93, attached upon said gated wheels, and. upon the drive shaft 20" driving the same, and of sprocket wheels 94 attached upon the gated sealing wheels 97. These are indicated at their pitch line, and the chain 95 connecting them is indicated by a dotted line. Said chain also acts upon sprocket wheel 96 timingly, and through a cam thereon operates the folding knife.
The gated sealing wheels 9'! on the left-hand unit are shown in contour in Fig. 13. The corresponding gated sealing Wheels 98 on the righthand unit are indicated in Fig. 14. All of said gated wheels, whether for forming up the sheet or for completing the fold, may be regarded as journaled upon shouldered pins, attached in the case of the left-hand unit upon the end frame, and in the case of the right-hand unit upon the suspended laterally movable sliding frame supporting the mechanism thereof. Cooperating wheels 99 are similarly. supported upon shouldered pins. The slight spring pressure required is conveniently furnished by the natural resiliency of said pins. Bearers H0 are indicated to cause said wheels to run smoothly past the recesses.
It will be noted that in the case of this modification the revoluble members are given rotation upon parallel axes. It will be noted also that the operative connection between the left-hand and right-hand folding units is not supplied by a common drive shaft but by individual inwardly projecting pins I00 upon the left-hand members, engaging in holes I 0| upon the right-hand members. Said holes are somewhat larger than the pins. Springs I02 act to maintain the pins against the working faces of the holes. It will be noted that I operate the transverse folding 'rolls likewise 'througha chain and sprockets, 'ina angle upward at IE3, the purpose of which is to.
' folding line and having a working edge over which a sheet may. be bent in a fold by the wheel.
devices; means for advancing the sheet intothe control of the wheel devices; and timed means for causing the wheel devices to engage against the sheet in afolding' action; I
2. In a folding machine, in combination, a tongue-like forming member, gated wheels adapted to fold a sheet thereover, and means giving said wheels a timed rotation so that the gate-,
ways therein will permit the'advanceofthe shee for delayed folding by said wheels.
3. In a" folding machine, in combination, tongue-like forming members, gated wheels axled perpendicularly thereto, and actu'atingand, timing'devices to render said wheels effective in folding a sheet over said forming members. A
4;. In a, folding machine, in combination; wheel devices over which a sheet may be folded; folding devices operable to fold a sheetthereover;
means for advancing the sheet into the control of said folding devices; and means for giving the folding devices a timed action against the sheet eifective to fold it. oversaid wheel devices. 1
5' In afolding machine, in combination, form? ing wheels operative at the folding line. gated wheels adapted to bend a sheet thereover; and, means giving said gated wheels a timed rotation effective to permit the advance'o'f'the sheet into the control thereof prior to the folding action.
6. In a folding machine, inicombination, forming wheels, gated wheels adapted to bend a sheet over the working edge thereof, a tongue-like forming memberfgated Wheels adapted to fold a sheet thereover, and means giving the said several gated wheels a timed rotation effective to permit the advance of the sheet for folding thereby. V
7. In a folding machine, in'combin'ationi revolvable members adapted to cooperate in fiattening a fold entered longitudinally between them, including a wheel aXled perpendicularlyto the paper path and a wheel axled horizontally to the paper path; and means adapted to advance a folded sheet between said wheels for such foldflattening.
8. In a folding machine, in combination, a timed reciprocating knife; transverse folding rolls, one thereof supplied with a laterally ex tending recess or trench adapted to receive the leading edge of the sheet when the same is directed thereinto by said knife, and to carry the same between said rolls without interference and Without requiring an intermediate advance of the sheet; meansgiving said recessed roll a rotation timed to present the recess therein to the sheetedge; and foldingmeans for folding the sheet entered thereby.
, in unison.
9; In 7 a folding. machine, "in? combination, a. timed ,reciprocatings' knife; 1 transverse folding rolls, one thereof supplied with a laterally. extendingtre'nch' or recess adapted "to receive the leading edge ofa sheet when'depressed thereinto by said knifa andto permit the same to change its angular position-thereinfso as to carry the 1 same seeurely 'and'without interference between p i said rolls for advancing-in usual course by them thereafter; means rotating: said rolls, including means timing the rotation of said recessedroll; bearer: means for controlling the approach of said rolls at said reeess;' and folding means effective to fold a sheet ent'ered ther'eby.
1 0. 111 a folding machine," in combination; a timed reciprocating-knife; timed transverse folding rol1s, '=each suppliedwith a laterally extending trench or'recesa-said'recesses adapted to'cooperate at the working edge of the knife to soften the fold produced thereby, and to facilitatethe withdrawal thereofjandthe cooperating edges thereof toact strippihgly upon the: knife in advance er closure fthere'omwithout affecting the course of the sheet thereafter; bearers for controlling theapproach ofsaid rolls. at said recesses; and" folding meanseifective' to produce further folds' upon the sheet entered thereby. llQIrr a folding 'machine, in combination, separable" folding devices, including tongue-like "forming 'membe'rs'over which a sheet may be folded; threaded means for. adjusting the separa-- tion' ofsaid'de vices; and s hand-wheel connected saidwheels in unison:
l3. In'afolding mamma s combination, separable folding devices; including tongue-like forming inembers,' and'timed devices adapted to folda sheet-thereover; the operating means therefor; a plurality of threaded shafts for con.- trolling the separation of said separable devices; toothed sprocket wheelsattached thereon; and a connecting chain adapted to rotate said wheels 14. In a folding machine, in combination, laterally separable supporting devices; folding devices thereon, and their operating connections; a plurality of threaded shafts'for controlling the separation of said supporting devices; sprocket wheels attached thereon; and a chain for syn-. chronizing the rotation of said sprocket wheels.
15. In a folding 7 machine, in combination, wheels supplied with gated flanges, forming wheels pressed yieldingly thereon over which a sheet may be bent by said flanges, means for timing the rotation of said flanged wheels, and
means for folding down the sheeton the folding line established thereby.
16. In a folding machine, in combination, a timed reciprocating knife; spring-pressed rolls rotating in time therewith, each supplied with a cooperating lateral recess; rightand left-hand separable frames; rightand left-hand separable forming devices connected thereto, said devices comprising wheel members over which a sheet may be bent to start a fold and tongue members over which the sheet may be laid down to fold thesame; rightand left-hand movable devices on said separable frames, adapted to act intermittently against the sheet to' fold it over'said forming devices, said movable devices comprising rightand left-hand gated flanged wheels upon' which said wheel members are pressed yieldingly in such manner that the flanges admit the sheet and then bend it thereover, and comprising also rightand left-hand gated wheels having, an action intermittently directed against the sheet to fold it over said tongue members, said gated wheels being axled perpendicularly thereto, and being spring-pressed upon cooperating wheels; means giving said movable devices a timed actuation, said means comprising a laterally extending shaft having a key-seat therein, rightand lefthand toothed wheels keyed slidingly thereon, and driving and driven toothed wheels of related dimensions connected thereto; and means for adjusting the separation of said separable frames from a single control, said means comprising a pluralityof threaded shafts, sprocket wheels attached thereon, and a chain connecting the sprocket wheels to rotate synchronously.
17. In a folding machine, in combination: a forming member over which a sheet may be bent to make a fold therein; an operable folding member adapted to engage against the sheet to bend or fold it thereover; means for giving the folding member a timed actuation; and. timed means for advancing 'thesheet to be folded into the control of the folding member for folding thereby.
18. Ina folding machine, in combination, a forming member and a folding member, the forming member having an edge over which a sheet may be folded and along which the folded sheet may be moved for discharging, and the folding member being adapted to foldthe sheet thereover; means for giving one of said members a timed movement adapted to cause the folding of the sheet by the folding member; means for advancing the sheet to be folded into the control of said members; and means effective to discharge the folded sheet from said control.
19. In a folding machine, in combination: a forming member having parallel edges over which a sheet may be bent in parallel folds; folding devices adapted to engage against the sheet to bend or fold it thereover; means for giving the folding devices a timed actuation; and means for advancing the sheet to be folded into the control of the folding devices for folding thereby.
20. In a folding machine, in combination: a forming member having parallel edges over which a sheet may be bent in parallel folds and along which the folded sheet may be moved for discharging; folding devices adapted to bend or fold the sheet thereover; means for giving said folding devices a timed movement; means for entering the sheet to be folded into the control of said devices; and means for discharging the folded sheet from said control.
21. In a folding machine, in combination: a forming member having separable edges over which a sheet may be bent in parallel folds; folding devices adapted to bend or fold the sheet thereover; means for giving the said devices a timed actuation; and means for entering the sheet into the control thereof for folding thereby.
22. In a folding machine, in combination: cooperating revolvable members, one thereof gated, said members adapted to flatten a longitudinally entered fold in a sheet; means timing the rotation of said gated member; and means adapted to enter a folded sheet for such fold-flattening, said means so timed that the leading edge of the sheet will be received in the aperture of the gated member to avoid its uneven retardation and the consequent distortion of the folding line.
23. In a folding? machine, in combination: cooperating spring-pressed wheels adapted to flatten a fold entered longitudinally between them, one thereof gated: means adapted to enter a folded sheet for such fold-flattening; and means timing the gated wheel to receive the leading edge of such sheet in the aperture or gateway of the same, to avoid its uneven retardation and the consequent distortion of the folding line.
WILLIAM JONATHAN NEIDIG.