US1222437A - Paper-bending machine. - Google Patents

Description

C. W. IVIEARS.

PAPER BENDING MACHiNE.

APPLICATION FILED MAR. 14, 1913.

Patented Apr. 10, 1917.

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C. W. MEARS. PAPER BENDINGMACHINE.

APPLICATION HLED MAR. 14, 1913.

Patented Apr. 10, 1917.

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C. W. MEARS.

PAPER SENDING MACHINE.

APPLICATION FILED MAR. 14. 19:3.

Patented Apr. 10, 191?.

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C. W. MEA'RS.

PAPER BENDING MACHINE.

APPLICATION FILED MAR. 14, 1913.

Patented Apr. 10,1917.

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C. W. MEARS.

PAPER BENDING MACHINE.

APPLICATION FILED MAR. 14, I913. L gfiwo Patented Apr. 10, 1917.

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CHLES W. 'MEABS, OF CLEVELAND, OHIO.

rarER-BEianme MACHINE.

, use of paper thus treated resides in the making of books, such as magazines and other periodicals, the leaves whereof are, by this bending or flexing operation, provided each with a hinge adjacent to the back of the book, whereby a flat-opening effect is secured. In my Patent No. 1,004,181, issued- September 26, 1911, there is disclosed a machine for flexing paper, and the machine of this invention has the same general objects in view as the aforesaid patented machine, but differs therefrom in a number of features which are designed to increase the out put and promote the efficiency of the ma chine, to enable the same to be combined with a folding machine, and to stack the paper after it has been flexed. Among the general objects to be secured by this invention are the combination of a paper flexing machine with a folding machine wherein the paper to be flexed is'folded to the desired size and to provide a machine of this char acter with stacking mechanism cooperating with the flexed paper as it is delivered from the flexing mechanism. Further objects of the invention are, generally, to improve the construction and operation of machines of this type. More limited and detailed objects ofthe invention will appear hereinafter and may be summarized generally as consisting of the combinations of elements embodied inthe claims hereto annexed and illustrated in the drawings forming part hereof wherein Figure 1 represents a side elevation of a paper bending or flexing machine constructed in accordance with my invention, showing the same combined with the rear 0" delivery end ofa paper-folding machine; Fig. 2 a top plan view of the paper-bending or flexing machine; Fig- 3 a central vertical sectional view of the machine shown in Fig. 2: Fig. 1 a rear elevation of the machine shown in the preceding Patented Apr. 10 191?.

Application filed march 14, 1913. Serial No. 754,279.

views, the tape-feeding rolls at the rear of the machine being omitted; Fig. 5 an elevation of the cam shaft; Figs. 6, 7, 8 and 9 elevations of the cams on the cam shaft and ofthe parts associated therewith; Figs. 10 and 11 enlarged sectional details of the paper-clamping mechanism; Fig. 12 a sectional detail of the front end of the machine as adapted for use uncombined with a paperfolding machine; Fig. 13 an end elevation, partly in section, of the machine of Fig. 12; and Fig. 14 a sectional view corresponding to the line 14-14 of F ig. 10.

Describing by reference characters the various parts illustrated herein, A denotes generally the rear or delivery end of a paper-folding machine, which may be of any desired or standard type, and B denotes generally my paper-bending or flexing machine, the front or receiving end whereof is arranged in operative relation'to the rear or delivery end of the folding machine and adapted to receive and operate upon the paper discharged therefrom.

The bending or flexing machine comprises a pair of upright side frames 1, of suitable design to support the various mechanisms which enter into the machine proper. These side frames are connected by means of transverse sills 2, 3, 4:, 5 and 6 (see Fig. 3) so arranged as to form with the said frames a rigid construction and to support the vari- 011s parts of the machine to be described hereinafter.

Projecting from the front or receiving end.

driven by the gear 12, which meshes with a large gear 13 driven by the folding machine.

The gear 12 is preferably on the same shaft as the roller 11 and, in order to drive the paper bending machine. the shaft carrying ing machine may in turn be driven. Mounted on the shaft 17 is a. roller 18, and the end of the shaft opposite the sprocket 16 is projaws are then opened, the gage removed vided with a pinion 19 meshing with a large gear 20 which is mounted upon and drives the cam shaft 21. Through the intermediate gears 22 and 23 and a pinion 24, a roller shaft 25 is driven from the gear 20.

In the operation of the machine, paper discharged from the final folding rolls of the folding machine is carried by tapes in the bending or flexing machine partly through paper clamping jaws and against a gage which is adjustable to vary the amount of projection of the portions of the leaves to be bent or flexed; the jaws are closed against the paper and are then oscillated across cooperating paper-flexing devices; the

from the path of the paper, the paper is pressed into driving engagement with the tapes, and is conveyed thereby to a stacker. The mechanism whereby these results are accomplished will now be described in detail.

Paper feeding mechanism.

The mechanism for feeding the paper from the front or receiving end of the machine to the clamping jaws and gage consists generally of two sets of tapes, with a suitable drive mechanism. The rollers 8, 9 and 18, described hereinbefore, constitute part of the feeding mechanism. The roller 8 is driven in the direction of the arrow (see Fig. 3) through the chain and sprocket drive 1416, referred to hereinbefore. A suitable number of tapes (indicated in dotted lines at 26 in Fig. 2) extend around the driving roller 18, under the roller 8, and around the roller 9. These tapes pass around tension devices comprising rollers 27 mounted on a shaft 28 and rollers 29 on arms 30 carried by said shaft. The rollers 27 and 29 are preferably coned for the purpose of keeping the tapes in alinement. The upper branch of each tape 26 runs above the rollers 27 and 29 while the lower branch passes from the bottom of the drive roller 18 over the roller 28 and beneath the roller 29 and around the roller 9, the upper branch passing beneath the roller 8.

Coiiperating with the tapes 26 is another set of tapes (indicated in dotted lines at 31 in Fig. 2) and serving to carry the sheets or signatures from the roller 18 to the clamping aws and the gage. The tapes 31 are preferably staggered with respect to the tapes 26, four of the tapes 31 being shown and five of the tapes 26. The tapes 31 pass around the drive roller 18 and around rollers 32, the lower branches of the tapes 21 passing around tension devices 33, 34, 35,

and 36 similar to the parts27, 28, 29 and 30, respectively.

Above the tapes and coiiperating therewith in feeding the paper from the inlet or receiving end of the machine to the gage is a series of rods 37. These rods are shown as located above the tapes 26 and may be secured to the cross sills 6 by means of brackets 38 and clamp screws 39.

Paperbewdz'ng or flexing mechanism.

The paper bending or flexing mechanism comprises generally a pair of normally separated jaws through which the paper is fed by the tapes, an adjustable gage arranged to intercept the paper when fed through the jaws and to arrest the movement of the same when the ends project through the jaws the desired distance, means for closing the aws upon the paper and for reciprocating the closed jaws across a yieldingly supported flexing device or devices, with means for automatically removing the gage from the path of the paper which has just been flexed, means for unclamping the jaws, and means for bringing the paper into driving relation with the tapes whereby it may be delivered to the stacker. As will be observed from Fig. 3, the tapes 31 pass above and in close relation to the upper surface of the plate 40, the plate being slotted, as shown at 41, for the rollers 32. This plate 40 is the lower member or jaw of the paper clamping means. The rear end of this plate has a slight upward bevel, as indicated at 42 (see Fig. 10) while the lower rear edge is beveled off, as shown at 43. A downwardly projecting rib 44 is provided adjacent to the rear or delivery end of'this jaw, and the sides of the. plate are provided with forwardly extending arms 45 which are pivoted on studs 46.

Coeperating with the lower jaw is an upper jaw which comprises a plate 47, shown as considerably shorter than the plate 40, but provided with the inclined surfaces 48 and 49 and the rib 50 corresponding to the parts designated 42, 43, and 44, respectively, on the lower jaw. The upper jaw is provided with forwardly extending arms 51 by means of which it is also pivoted on the studs 46. The jaws are normally separated, as indicated in Figs. 3 and 10, but are adapted to be closed and oscillated by the connections to be described hereinafter.

Located beyond the rear or delivery end of the paper clamping means is a gage bar, indicated generally at 52. This gage bar is formed with a V-shaped trough or recess 53 presented toward the opening between the clamping jaws, the apex of the V being in opposition to the central portion of the signature or group of leaves when, the jaws are closed. The function of the gage bar is to determine-the length of the projecting paper ends which are to be bent or flexed and the particular construction of the trough-shaped recess is for the purpose of causing a progressive increase in length of the hinged portions of the signature leaves from the outer to the middle portion of the signature, as pointed out and claimed in my application'No. 679,359, filed February 23, 1912. The gage bar is threaded upon screw shafts 54 provided at their rear ends with bevel gears 55 meshing with bevel gears 56 on a shaft 57 havinga hand wheel 58 thereon. This construction affords convenient means whereby the gage bar may be adjusted toward and from the clamping jaws, as occasion may require. The shaft 57 is journaled in arms 59 projecting from a squared rock shaft 60, and the shafts 54 are journaled in this rock shaft.

Located beneath the rear end of the clamping jaws is a pair of rollers 61. These roll ers are journaled in the upwardly extending arms 62 of a pair of angle levers, each of said levers having a rearwardly projecting arm 63 and the levers being pivoted at their angles to the side frames, as indicated at 64. The rear ends of the arms 63 are provided with rods 65 having their lower ends guided in brackets 66 projecting inwardly from the side frames, with springs 67 surrounding said rods. When the clamping jaws are closed and oscillated,by mechanism to be described hereinafter, the projecting ends 68 of the leaves of. the paper mass or signature 68 are drawn across the rollers 61, in the manner shown in Figs. 1.0 and 11. The rollers force the paper ends into contact with the outer surface of the upper aw, the rocking lever and spring construction affording a yielding means for enabling the rollers to press the paper against the outer surface of the said aw. The ribs 50 prevent the rollers from passing so far beyond the rear ends of the jaw as to interfere with the reverse movement of the jaws. After the paper has been'flexed in the-reverse direction against the rollers 61 a definite hinge or bending line is established at 69 by this action. Thetight clamping of the paper in this line is facilitated by the inclination of I the surfaces 42, 48.

In. order to close the jaws upon the paper, the upper jaw is first pulled downwardly toward the 'lower jaw to clamp the paper, whereupon further downward movement of the upper jaw will cause both jaws to move downwardl The return of the clamping jaws to no lnal position will be effected by a. spring and, as the jaws reach their upper limit of movement, the upper jaw is elevated to separate the jaws and permit the paper to be carried farther by the tapes. This operation is accomplished by means of a cam on the cam shaft 21 operating to rock a shaft which, through interposed lever mechanism,oscillates the upper jaw. 70 denotes a pair of links having their upper ends connected to depending lugs or ears carried by the upper jaw and their lower ends connected to a pair of rearwardly projecting arms 72 mounted on a rock shaft 73. 74 denotes an arm extending upwardly from this rock shaft and provided at its upper end with a roller 75 which cooperates with a cam 76 on the cam shaft 21. This cam has aflixed thereto a U shaped strap 77, and cooperating with the strap 77 is a curved strap 78, these straps and the cam 76 forming in effect a sectional track cam.

79 denotes a pair of rods depending from the lower clamping jaw and suitably guided at their lower ends, as by means of the transverse sill 5. Each of these rods is provided with a spring 80 which is adapted to resist the downward movement of the lower jaw and to return the same and the superposed upper jaw to normal position. When the signature or group of sheets of paper is in place between the clamping jaws, with the projecting ends of the paper in engagement with the gage bar 52, the rotation of the cam shaft 21 rocks the shaft 73 and pulls down upon the upper jaw through the rods or links 70, closing the jaws. Further downward movement of the links 70 swings the rear ends of the clamping jaws across and below the rollers 61. The spring 80 on each rod 79 restores the clamping jaws to the position shown in Figs. 3 and 10, but with the jaws unclamped. Further rotation of the shaft 21 causes the strap 78 to engage the roller 75 and rock the shaft 73 a sufficient distance to elevate the upper clamping jaw and thus unclamp the paper.

Meanwhile it is necessary, before the pa per may be fed to the point of delivery, to remove the gage bar from its path. This is accomplished by rocking the shaft 54, and this rocking of the shaft 54 is produced by a cam on the cam shaft and suitable connections between the same and the rock shaft 54. 81 denotes the cam on the shaft 21 and 82 a rod which is connected at its rear end to a rock arm 83 projecting from the shaft 54 (see Fig. 2). The front and lower end of the rod 82 is slotted, as indicated in dotted lines at84 (see Fig. 6) to receive the shaft 21, a roller 85 being provided on said rod to engage the cam. It will be evident that, by proper timing of the cams, the rotation of the shaft 21 will cause the shaft 54 remove thegage .from the path'of the paper.

The return of the gage to normal position is -to be rocked at the appropriate period to 1-5 r ner as the cam 81 operates the shaft 54. 90

slipping beneath the paper in the clamp. In order to insure a :pro er frictional contact between these tapes an the paper, I provide means for pressing the paper downwardly into contact with the tapes when the jaws are ened. and the gage plate is elevated. For t is purpose, a rock shaft 86 is journal'ed on top of the side frame and is pro- ,vided with a pair of rearwardly projecting denotes a rod having its lower andrear end slotted, as indicated at 91 ,(see Fig. 7) to enable the rod'to be mounted upon the shaft 21 and to bereciprocated by the cam, the rod being provided with a roller 92 adapted "to engage the cam and having its upper end connected to'an arm 93 projecting from the shaft 86 (see Fig. 1). For the purpose of restoring the parts to inoperative position, the shaft 86 is provided with an arm 86, and a rod 86 is connected to said arm and suitably guided by the frame, said rod being surrounded by a spring 86 which will positively return the parts to the position shown in Fig. 1.

When the jaws are opened and the gage bar removed, the parts are so timed that the rollers 88 will be pressed downwardly upon the paper, securing a driving friction between the lower surface of the same and the tapes which will insure the delivery of the paper to the stacker.

As will be evident from an inspection of Fig. 11, the paper mass or signature 68 is of suiiicient length to enable the tapes to carry it to the delivery rollers. These rollers com rise a the sha 25 and a pair of upper rollers 96 carried by arms 97 which are loosely journaled upon a rod 98 conveniently located above and carried by the rock shaft 54. The rollers 96 are preferably covered with rubber and, as illustrated, merely exert a gravity pressure upon the paper delivered between the same and the roller 94. At the rearof the roller 94 is located a curved plate 99, which curved plate serves as a guide to engage the rear end of the traveling mass or signature and direct the same downwardly into the front end of a stacker box.

The stackerbox comprises a pair of vertically extending side plates 100, preferably of angle iron construction, and a pair of intermediate bottom straps 101, suitably united, as by means of cross bars 102. I The stacker is provided with a central post 103 having a rack 104 thereon, which rack and post are mounted in a suitableguide bracket 105, shown as carried by the transverse sill lower roller 94 mounted on- 4. 106 denotes a shaft which is squared for the application of a, lever thereto, said shaft havm a pinion 107 thereon meshing with the rac to enable the stacker box to be raised and lowered.- 108 denotes a ratchet wheel and 109 a pawl coiiperating therewith to hold the stacker box in any desired posi-v tion. The vertical movement of the stacker box is accommodated by means of the slotted guides 110 whichcoiiperate with suitable bolts (not shown) carried b the frame. 110 indicates an upwardly inclined back board against which a si ature 68 may rest. The stacking of the signatures against this back board is accomplished by means of a reciprocating rod 111 mounted in guide sleeves 112, 113 carried by brackets 114, 115, mounted on the transverse sills 2 and 5.

This rod is reciprocated by a track cam 116 on the shaft 21 (see Figs. 5 and 9), the track of the cam receiving therewithin a roller 11'? carried by the upper end of a lever 118 which is shown as pivoted to a stud 119 carried by a bracket 120 carried by the transverse sill 2. The lower end of the lever 118 is connected by a link 121 with the rear endof the rod 111. The front end of the rod 111 is connected to a cross head 122 provided with a plurality of fingers 123 which are adapted to project through the slotted bottom of the stack and to engage the signaassist in keeping the head level. The slotted guides 110, being within the sides of the box engage the side edges of the signatures and retain them until they are engaged by the fingers 123.

With the parts constructed as described, the operation will be clear. A paper mass, such as a signature, folded by the folding machine, will be discharged between the rollers 8 and 9 and conveyed by the tapes 26 and 31 against the gage 52, the gage serving to aline the projecting ends of the paper in the most desirable manner. Through the connections described, the cam shaft 21 causes the clamping jaws to close and oscillates these jaws across therollers 61, thereby fiexing the paper and producing the desired hinges in the sheets thereof. Further movement of the cam shaft positively opens .the jaws, lifts the gage bar out of the way of the sheets, and insures a driving friction between the paper and the tapes 31 through the pressure of the rollers 88. The paper is then carried between the rollers 94 and 96v folding machine. The bracket 7 and rollers 8 and 9 will not be provided in this case, but a table 125 may be secured to the front end -of,the machine, as by means of a bracket upwardly, as shown at 132, and is adapted to project above a feed roller 133 (driven from the shaft 21 by means of gears 134 and 135). When the arm 130 is pushed upwardly by the cam and the rod 129, it will rock the shaft 131 in proper direction to project the upwardly extending end 132 of the stop into the path of the paper and prevent the same from entering the machine. The roller 133 is shown as slotted for the reception of the stop plate 132. Cooperating with the roller 133 are rollers 136 mounted on a shaft 137 which is carried by arms 138 rigid with the shaft 131. 139 denotes an arm projecting forwardly from the shaft 131 and having a rod 140 connected thereto and suitably guided by one or more brackets 141 on the frame, there being a spring 142 surrounding the rod and serving to rock the shaft 131, and remove the stop plate 132 from its blocking position as soon as permitted by the cam. The cam not only projects the stop plate into the path of the paper, preventing it from entering the machine, but elevates the rollers 136, allowing the paper to be inserted as far as said plate. When permitted by the cam, the spring 142 removes the stop plate from the path of the paper and rocks the rollers 13.6 into engagement with the upper surface of the paper and into frictional driving contact with the tapes 31 passing over the roller 133.

Having thus described my invention, what I claim is 1. In an apparatus of the character set forth, the combination, with a pair of clamping members, of paper conveying meansadapted to carry paper between and beyond said members, a gage for limiting the projection of the paper beyond the clamping members, means for bringing said members into clamping engagement with the paper therebetween, means for bending or flexing the projecting ends of the clamped paper, means for separating the clamping members after the bending or flexing operation, means for moving the gage out of the path of the paper, and means whereby a driving connection between the paper and the conveyer may be obtained after the separation of the clamping members and the removal of the gage.

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' 2. In an apparatus of the character set flexing mechanism, feed rollers coiiperating therewith to convey the paper beyond said mechanism, a stacking receptacle beyond said rollers, and means for moving the paper along said receptacle.

3. In an apparatus of the character set forth, the combination of a pair of paper clamping members, a yieldingly supported roller, means for moving the clamping members across said roller, said clamping members being provided each with a lateral projection adjacent to the end proximate to said roller and adapted to engage the roller to limit the movement thereof by its yielding support. a

4. In paper bending or flexing mechanism, the combination, with a pair of paper clamping members, of a pair of roller supporting arms, a roller journaled in said arms in position to engage the paper projecting from the clamping members, arms projecting angularly from the first mentioned arms, springs coiiperating with the last mentioned arms, and means for oscillating the paper clamping members.

5. In an apparatus of the character set forth, the combination of a pairhf clamping members, a paper conveyor extending between said members and movable therebetween, means for clamping paper between said members with the ends projecting, means adapted to engage said projecting ends for the purpose of bending or flexing the same, and a stop adapted to limit the movement of the paper through the said members by the conveyer.

6. In an apparatus of the character set forth, the combination, with a pair of clamping members, of a paper conveyer extending between said members, means for opening and closing said members, a stop for limiting the movement of the paper through and between said members, means adapted to operate upon the projecting ends of the paper to flex the same, means for moving the stop out of the path of the paper, and means for pressing the paper against the conveyer to enable it to be fed from the clamping means after the latter has been opened.

7. In an apparatus of the character set forth, the combination, with a pair of clamping members, of a paper conveyer extending between said members, means for opening and closing said members, a stop for limiting the movement of the paper through and between said members, means adapted to operate upon theprojecting ends of the paper to flex the same, and means for moving the stop out of the path of the paper.

8. In an apparatus of the character set forth, the combination, with a pair of clamping members, of means normally holding 181D paper between said members, a stop adapted to limit the projection of the paper beyond said clamping members, a shaft, and mechanism driven by said shaft for 'closingand' unclosingthe clamping members, for bending or flexing the projecting ends of the paper, for removing the stop from the path of the paper after the bending or flexing of the paper, and for pressing'the paper into frictional engagement with the conveying means after said members have been separated.

9. In an apparatus of the character set forth, the combination, with a pair of clamping members, of means for conveying paper between said members, a stop adapted to iimit the projection of the paper beyond'said clamping members, a shaft, and mechanism driven by said shaft for closing and unclosing the clamping members, for flexing. the projecting ends of the paper while the members are closed, and for pressing the paper into frictional engagement with the conveying means after said members have been separated.

10. In an apparatus of the character set forth, the combination of a pair of clamping members, an endless conveyer extending between said members and adapted to convey material therebetween, means for blocking and unblocking the movement of the material by the conveyer, and means for forcing material into frictional engagement with the conveyer after the unblocking operation.

11. In an apparatus of the character setforth, the combination of a pair of clampi'ng membersnormally spaced apart, an endless conveyer extending between said members, a support for said conveyer carried by one of the members, means cooperating'with' said members to flex the paper delivered thereto by said conveyer, and means for. oscillating the members with respect to the cooperating flexing device.

12, In an apparatus of the character set forth, the combinatibn of a pair of normally separated clamping members, an endless conveyer extending bet-ween sa1d members,

a support for said conveyer carried by oneand means for forcing said device into contact with the material on the conveyer when the said members are separated after oscillation.

18. In an apparatus of the character set forth, the combination of a pair of clamping members, an endless conveyer extending between said members, means for closing said members, a device cooperating with said members to flex the-paper projecting therebeyond, means for separating said members after the flexing operation, a presser device, and means for forcing said device into contact with the material onithe conveyer when the said members are separated after the flexin operation.

14. 11 an apparatus of the character set. forth, the combination of a pair of normally opened clamping members, an endless conveyer extending between said members, a rotary support for said conveyer carried by one of said members, a rock shaft carried by the opposite member, an arm projecting from said rock shaft, a roller on said arm, means for closing said members, means for oscillating the closed members, a device cooperating with the oscillating members to flex the paper projecting therebeyond, means for opening said members after such oscillation, and means operative upon the separation of said members for rocking the shaft to force the roller into contact with the paper on said conveyer.

of said members and movable toward and from the endless conveyer, a cam, an? connections between said cam and-the p;.esser device for moving the same toward the conveyer.

16. In an apparatus of the character set forth, the combination of a pair of clamping members, means for opening and closing the same, means for conveying paper into and through said members, a stop bar on the delivery side of said members, means cooperating with the clamping members to flex the paper projecting beyond the latter, a rock shaft supporting said stop, and means for automatically rocking the shafttof move the stop from register with the dis- -charge ends of the clamping members when the'latter are opened after their oscillating movement.

17. In an apparatus of the character set forth, the combination of a pair of clam-p ing members, means for feeding paper into and through the same, means for opening and closing said" members, means cotiperating with said members to flex the paper pro jecting through the delivery ends thereof, a

rock shaft, a gage supported by said shaft and adjustable toward and from the discharge ends of the clamping members, and means forrocking said shaft to'move the members,

naaanaa gage out of alinement with the delivery end of said members when they are opened after the paper flexing operation.

18. In an apparatus of the character set forth, the combination of a pair of clamping means for feeding paper through and beyond said members, means for closing said members, means cooperating with the said members to flex the paper projecting therebeyond, means for opening said members after the paper flexing operation, a rock shaft, screw shafts journaled in said rock shaft, a gage mounted on the threaded portions of said shafts, and arranged to intercept the paper which is fed through the clamping members to limit its projection therebeyond, means for rocking said shaft, and means carried by said shaft for rotating the screw shafts.

19:11; an apparatus of the character set forth, the combination of a pair of clamping members, means for feeding paper through and beyond said members, means for closing said members, means cooperating with said members for flexing the ends of the paper projecting therebeyond, means for opening said members after the flexing operation, a rock shaft, a gage carriedby said rock shaft and adapted to be moved thereby into and out of blocking relation to the paper projecting beyond the delivery ends of the clamping members, a driving roller located at the rear of the gage, arms pivotally supported from the rock shaft, rollers carried by said arms and cooperating with the drive roller, and a curved plate'behind said rollers.

20. In an apparatus of the character set forth, the combination of a pair of clamping members, means for feeding paper through and beyond said members, means for closing said members, members for flexing the ends of the paper projectin therebeyond, means for opening said mem ers after the flexing operation, a rock shaft, a gage carried by said rock shaft and adapted to be moved thereby into and out of blocking relation to the paper projecting beyond the delivery end of the clamping members, a driving roller located at the rear of the gage, arms pivotally supported from the rock shaft, and rollers carried by said arms and cooperating with the drive roller.

21. In. an apparatus of the character setforth, the combination of a pair of clamping members each pivotally supported at one end thereof, an endless conveyer extending between said members, a rotary support for and forcing it toward the opposite member,

meansconnected with the otherpme nber for blocking device from means cooperating with said- Pr j ct mentioned member and for rocking both I members on their pivots against the action of the spring, a device cooperating with said members to flex the paper projecting beyond the delivery end thereof during the oscillation of said members, and means for moving the second member away from'thefirst member at the end of the oscillating movement.

22. In an apparatus ofvthe character set forth, the combination, with paper bending or flexing mechanism, of a conveyer for carrying paper to said mechanism, a roller adapted to deliver material to said conveyer, a device extending on the delivery side of said roller and adapted to block the feed of material therebeyond, and means for automatically removing the blocking device from the path of the paper.

23. In an apparatus of the character set forth, the combination, with paper bending or flexing mechanism, of a conveyer for carrying paper to said mechanism, means for driving said conveyer, block the feed of material by said conveyer, and means for automatically removing the proximity to the conveyer and the path of the-paper.

24. In an apparatus for flexing paper, the combination, with paper bending or flexing mechanism, of a roller, an endless conveyer driven by saidroller for carrying the paper to the said mechanism, a rock shaft, a member carried by said shaft and adapted to be projected into and out of the path of the paper on the delivery side of said roller, a shaft, a cam thereon, connections whereby said cam may operate the rock shaft, and a spring for operating the rock shaft in oppositionto the cam. V

25. In an apparatus of the character set forth, the combination, with paper bending or flexing mechanism, of a roller at the inlet end of said apparatus, means for driving the roller, conveying tapes extending from the roller to the flexing mechanism,.a rock shaft, an arm connected with said rock shaft and having a projection adapted to extend between the tapes and into the path of the paper carried thereby, a shaft, means driven by the shaft for operating said arm arms from the rock shaft, a shaft supported by said arms'above the roller, and rollers mounted on the last-mentioned shaft. In testimony whereof, I hereunto aflix my signature in the presence of two witnesses.

o -mnrns w. amass.

Witnesses:

BRENNAN B. Wear,

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