US1028919A - Paper-cutting machine. - Google Patents

Description

D. I. WADHAMS. PAPER CUTTING MACHINE. APPLICATION IILED JULYSO, 1909.

1,028,919, Patented June '11, 1912.

3 SHEETS-SHEET 1.

W/T/YESSfS: INVENTOR COLUMBIA PLANOGRAPH (.10., WASHINGTON, D. c.-

Dankzs 737502 1215,

BY I ATTORNEY? D. T,. WADHAMS.

PAPER CUTTING MACHINE.

APPLIUATION FILED JULY30,1909.

1,028,919; Patented June 11, 1912.

a SHEETS-SHEET 2.

I INVENTOR 4 flanks 777490726 1728.

ATTORNEY WITNESSES:

COLUMBIA PLANDURAPH co, WASHINGTON, D. c.

D. '1? WADHAMS. PAPER CUTTING MACHINE; APPL IOATION FILED JULY 30,1909.

' Patented June 11, 1912.

a sums-snfim a.

COLUMBIA PLANDGIIAPII C0.. WASHINGTON. D. c.

UNITED STATES" PATENT "OFFICE.

DARIUS 'r. WADHAMS, 0F OSWEGO, NEW YORK, AssIeNoR TO IELGRAY; 33;, 015

- oswneo, NEW YORK.

PAPER-CUTTING MACHINE.

lower the clamp onto the work, producev pressure thereon during the cutting and permitting the greatest belt power tobe applied to the knife during the cutting operation.

.sure device operating on the clamp to pro- Import-ant features of my invention are a suitable clamp to work independent of the knife in cutting, the clamp being sustained in elevated position by oppositely arranged springs; automatic mechanism to overcome the resistance of one spring whereupon the weight of the clamp is suflicient to overcome the tension of the other spring, permitting the lowering of the clamp on to the work by gravity, to bear thereon adequately to compact and force out the air from the pile, preparatory to the clamping thereof during the operation of the knife; a presare shown in the accompanying drawings,

in which Figure 1 is a front elevation of a machine embodying my invention; Fig. 2 is a side elevation thereof viewed from the right; Fig. 3 is a vertical cross-section thereof on line 33 of Fig. 1; Fig. 4 is a partial plan view Specification of Letters Patent.

' PatentedJun 11, 1912.

Application filed July 30, 1909. Serial No. 510,452.

of the righthandport-ion of the machine, slightly enlarged, to illustrate the pressure adjust-ing device; Fig. 5 is a partial cross section on line 55 of Fig. 1, viewed from the left, showing a hand operated mecha- 1118111 as it may be applied to this machine;

Figs. 6, 7 and 8 are detailviews showing the detachable clamp face, Figs. 6 and 7 are sectional views showing same respectively in securing and releasing positions and Fig. 8

vis a partial front elevation thereof. Fig. 9

is a partial section showing the form of table groove employed. Fig. 10 is a partial 3 elevation illustrating indetail the operating jaw of the pressure device.

Referring to the drawings, in which the numerals of the description indicate'corresponding parts in all the figures, the frame of the machine is formed as shown with the rightand left leg standards 1 and 2 secured at their lower ends by the usual. crossrods3; and provided respectively with the uprights 4 and 5. The uprights assho-wn have their front faces arranged to form a slide-way for the usual knife-stock 6, operating between the uprights and the guideway bars 77 secured thereon by the bolts 8.

The knife-stock, carrying the knife 9 is arranged to reciprocate in its slide-way so formed and is carried and operated by the pitman connections 1011 attached to either end of the knife-stock and connected at their lowerends respectively to the cranks 12 13 on opposite ends of the drive shaft 15.

16 indica'tes the usual power shaft having fixed thereon the driving pulley 17 and on which is journaled the usual idler 18, said power shaft being suitably connected to communicate drivingpower to the drive shaft 15, as by the engagement of the pin ion 20 secured on the power shaft, with the large drive gear 22 fixed on said drive shaft. To produce the desired draw out guide 23 is pivotally secured to the knife stock and -fitted to slide in the guide way 24 integral with the upright 5. v

The" pile tobe cut is placed on the usual table 25 against the adjustable back-gage 26 provided with gage fingers 27 sliding in the table grooves28 to prevent the paper from wedging under the gage. The gage may be operated for the adjustment of the pile as here shown by the elongated screw, 30,

journaled in front and rear brackets 31-32 and provided with operating crank 83 on its front end, and fitted to the internally screw-threaded bracket 36 of the back gage depending through the central table slot 38.

As best shown in Fig. 9, the edges formed rounded off and correspondingly the lower edges of the back-gage fingers are rounded to prevent the indentation of the stock un-' der heavy pressure. This formation of the grooves is further advantageousin that it" obviates the liability of the paper at the bottom of the piles catching when being positioned or moved on the table.

To clamp the piles during the cutting there is arranged to slide in suitable guide ways in the uprights,- theclamp-member 40., having clamp-fingers 42, and provided on either end with the depending straps 43 having on their lower ends racks 44 by which the clamp is lowered for the clamping of the pile.

To raise the clamp and'normally hold it in elevated position, springs 5051 are arranged in suitable brackets within the respective right and left hand members, bear-. ing on the under side of the curved rollerarms 55, provided with rollers '56 on their forward ends engaging the bottom ends of the racks 44. The springs 5051 are retained in position by the guide pins 58 depending from the brackets and the lifting power of both. these springs exerted on the opposite ends of the clamp by the rollers 56 is sufficient to raise the clamp into elevated position, designated by the engagement of bracket stops 60 with the stop-lugs 61 on the standards 1 and 2. The weight of the clamp with the straps etc. is however, .more than sufiicient to overcome the upward lifting power of one of the clamp springs whereby the result is that upon the depression of one spring the clamp will descend on to the work by gravity, the weight thereof depressing the opposite spring.

WVhile there is shown mechanism to compress merely one spring for the above purpose, we do not limit ourselves to the compression of one spring. As will be understood, mechanism could be provided tending to depress both springs but with less power than would be necessary therefor, the weight of the 'clamp being utilized to overcome the remaining resistance, in which case the clamp will descend upon the work by gravity, but to bear thereon with less than its full weight. As will be readily understood,

a saving of power is thus accomplished. To

this end cam 64 is fixed on the driving shaft 15 and operates to pulldown the left hand clamp spring 51 by engagement with roller 65 on one arm of bell-crank lever 67 fulcrumed at 66 on the standard, whose other arm 68 is connected to short arm 70 of the second bell-crank-lever 71 by link 72; the

latter lever 71 is fulcrumed at 73 on the frame standard and has its longer arm connected to the left hand clamp elevating arm 55 by connecting rod 75 pivoted at 7 8 to the bell-crank arm and at its upper end to the by the table grooves 28 are preferably pin of the roller 56. It will thus be seen that depression of roller 65 by the cam 64 Will operate bell-crank-lever 71 to pull down the clamparm 55, against the pressure of its spring 51, permitting the clamp to descend by gravity onto the work against the tension of spring 50 to bear thereon with only sufficient of its weight to compact the pile ready 'to receive the clamping'pressure produced by the pressure mechanism now to be de scribed.

The pressure device here shown consists of va pressure case journaled on the end of the clamp shaft 87, which shaft is provided with rack-pinions 88 in engagement with the racks 44 of the .clamp straps whereby a rotatable pressure on the clamp shaft will operate the clamp to produce pressure on the work. This is accomplished on the oscillation of the pressure case 85 in one direction when the engagement of pawls carried therein with ratchets of a friction mechanism inclosed operate to slip the friction when the clamp bears on the work with sufficient pressure. The pressure case'is retarded in this operative movement bythe action of the weight 90 integral therewith. The purpose for thus retarding the case is to allow the jaw' 92, fulcrumed on the case at 98, to first operate the pawls, throwing them into engagement with the ratchets of the friction mechanism before movement is imparted to the case. This operation of the jaw with reference to the case is caused by reason that the case is rotated therethrough; cam integral with crank 12 fixed on the driving shaft 15, being arranged to engage roller 96 on the jaw to throw the pawls into engagement, after which further movement imparts motion to the pressure-case to operate the friction mechanism.

The jaw is provided with the forward stop 98 adapted to engage the case stop 99 after the pawls have been fully forced into engagement by the operation of the cam 95 engaging the jaw, and jaw stop 100 is for a similar purpose to engage case stop 102 when the pawls have been fully withdrawn from engagement with the ratchets of the friction mechanism, the weight of the aw being sufiicient to accomplish this on belng released by the cam. v

As best shown inFigs. 1 and 10, the friction mechanism consists of the ratchetwheels 104 having ratchet teeth 105, suitably journaled on the clamp shaft in frictional engagement with the friction disks 106 fixed on the said shaft; the ratchetwheels, disks and pressure case being secured on the shaft by the securing nut 107. As best shown in Fig. 10 the ratchets 105 are engaged by the pawls 108 pivotally hung in the pressure case and operated by the jaw through short links 109. The return of the pressure case after each operation is caused by the action of theweight, the return movement thereof being governed by the adjustable stop rest. As best shown in Figs. 2- and 4, this stop rest 110 is journaled on the clamp shaft and provided on its rear end with the rest lug 112 engaging the under portion of the pressure-case weight forming a support therefor. It will be seen that upon the weight 90 being raised or low ered, the pressure case, integral therewith, will be rotated to cause the jaw 92 to move toward or from the pressure cam resulting in shortening or lengthening the time during which the friction mechanism will be operated by the engagement of high portion 114 of the pressure cam with the jaw roller and thereby reducing'or increasing the distance the ratchet 105 moves relative to the disks 106. The'effect therefore of raising or lowering the stop rest to adjust the normal relation of the jaw to the pressure cam, whereby it is engaged for a longer or shorter period to govern the length of time during which pressure is produced, is to compact the pile to a greater or less degree, depending on the length of time the pressure is applied thereon. 'It will be understood that the compactness of a pile of paper under an even pressure will vary according to the length of time it is subjected to pressure owing to the quantity of air contained therein, this being particularly true of work which is under pressure only for a comparatively short time as in the case, of the rapid cutting thereof in automatic machines of this type. To this end the stop rest is provided with the forwardly extending arm 115, by which it is rocked on the clamp shaft to raise or lower the rest-lug 112 for the purpose described, and secured in ad justed position by the latch-handle 116, pivoted at 117 thereon and having pin 118 normally held by spring 119 in engagement with notches 120 of the securing segment 121, secured to the standard 1 by the bolts 123 as shown. I

In Figs. 1 and 2 is shown means whereby 'the clamp maybe lowered independently by depression of a treadle 130 fulcrumed on the fulcrum pin 133 carried by the upper and lower arms135-136 and connected to rotate the clamp shaft on being depressed by producing a leverage thereon by means of the chain 138. The chain is connected at 139 to the treadle and at its upper end'is carried by the chain wheel 141 fixed on the clamp shaft, to which it is secured at 142, thus producing leverage on the clamp-shaft, to lower the clamp, on the depression of the treadle. 144 is a counter balance weight adjustably secured to 'the rear end of the treadle member by set screw 145.

An important feature of this invention is shown in Figs. 6, 7 and 8 and consists of a detachable clamp face 150 adapted'to be fas- I securing it against side movement and insuring its correct positioning thereon. To secure the clamp face when placed in position I employ a holder or collar 155 adapted to be inserted between the,central clamp fingers to rest on the bottom side ledges thereof as best shown in Fig. 8, and containing the spring 156 surrounding the stud 159'secured to the clamp-face said stud being provided on its .upper end with the enlarged head 160, fitted to slide within the holder, and by which the spring is confined, whereby the spring exerts an upward pressure thereon normally tending to bring the clamp-face and holder together securely clamping the face on the clamp proper as shown in Fig. 6. To separate the holder and clamp face whereby it may be inserted on the clamp or detached therefrom, a cam lever 162 is fulcrumed at 163 on the holder and has a cam portion 164 operating as shownin Fig. 7 to force the stud down against the action of the spring whereby the holder and the clamp face are separated.

In Fig. 5 I have shown a hand operated mechanism by the operationof which the clamp may be lowered entirely by hand or an added pressure may be produced on the work thereby after thesame has been lowered automatically or by foot or after the automatic pressure has been applied. This mechanism as shown consists of a mutilated gear 170, loosely journaled on the clamp shaft, provided with the internal lug 17]. adapted when the gear is rotated by the engagement of the spiral thread 173 of the shaft 174, to engage the lug arm 175 fixed on the clamp shaft whereby the clamp shaft is rotated to lower the clamp. The internal lug 171 normally is held out of range of the clamp shaft lug arm 175; a portion of the gear teeth being omitted for this purpose whereby the return movement of the gear is stopped when said lug is in a position free of the lug as shown in the drawing, the gear teeth being then out of engagement. To insure the reengagement of the teeth with the spiral thread on the rotation ofthe shaft 174 in the direction to lower the clamp, a fiat spring 178 is secured on the under portion of the table in engagement with pin 179 of the gear whereby the first of against the spiral thread of shaft 174:; said shaft being ournaled in the bracket 180 and provided on the other end with the usual hand wheel 181.

I have thus provided a machine in which the single-one-piece clamp is lowered onto the work automatically with the minimum of power required therefor, the clamp being spring balanced whereby the clamp will be lowered by gravity on the depression of one spring only and no power whatever being required to return same to elevated position, or, the clamp may be independently lowered by foot or by hand operated mechanism, the latter also being adapted to produce additional pressure on the work to that produced by the automatic pressure device provided for this purpose. The improved pressure device here employed operates to produce a clamping pressure on the work immediately before the cutting operation of the knife, maintaining said pressure until the knife has again returned to elevated position, thus preventing rippling of the paper on the return up stroke of the knife and this mechanism is further adjustable to compact the paper piles to a greater or less degree by the convenient adjustment of the length of time pressure is applied, this feature being particularly valuable in the cutting of piles of uniform size in that the pressure may be quickly adjusted to the requirements there of. On the cutting of soft stock the adjustment of the clamp face is quickly accomplished by the use of the improved holder employed to prevent the indentation of the work by the clamp fingers. Thus my machine is suitedand conveniently adjustable to a wide range of work and derives the greatest possible belt power in the cutting operation.

Having thus described my invention what I claim is 1. In a paper cutting machine, the combination with the knife and the clamp to cooperate "with the knife during the cutting operation,of clamp sustaining means normally to elevate the clamp and mechanism independent of the clamp to depress said sustaining means to permit the clamp to lower and rest upon the work by gravity.

2. In a paper cutting machine the combination with a suitable frame and table thereon, a clamp fitted to the frame, clamp operate the knife, a clamp fitted to the pressed arms arranged adjacent to the de-- pending racks, rollers on the arm ends in engagement with the under portion of the racks whereby said arms operate to elevate the clamp their combined strength being necessary therefor, stop lugs on the arms, opposing lugs on the frame in position to be engaged by the arm lugs when the clamp is in elevated position, a cam on the drive shaft, and connections between the cam and one of the arms whereby said arm is depressed to permit the clamp to descend by gravity on to the work against the tension of the opposite arm.

5. In a paper cutting machine the combination with a suitable frame and a table thereon, a knife, a drive shaft, connections between the knife and the drive shaft, whereby the knife is operated, a clamp, racks depending therefrom, a clamp shaft, rackpinions on the clamp shaft in mesh with the racks, a pressure-device on the clamp shaft through which said shaft is operated whereby a clamping pressure is produced on the work by the clamp, a pressure-cam on the drive-shaft, an operating jaw for the pressure-device arranged to be thrown into operation by the cam to produce the clamping pressure and means to adjust the position of said jaw relative to the pressure cam whereby the pressure is adjusted for a longer or shorter period.

6. In a paper cutting machine, a clamp, clamp-shaft, connections between the clamp and the shaft, a pressure device on the clamp-shaft by which said shaft is operated whereby a clamping pressure is produced upon the workby the clamp, said pressure device being provided with an operating case, an operating jaw pivotally carried thereon, a drive-shaft, a pressure operating cam arranged on said shaft in position to engage the operating jaw whereby said jaw is moved first to throw the pressure device into engagement and to slip the friction thereof to produce the-clamping pressure, a weight carried on the pressure case normally tending to return said'case against the action of the cam, an adjustable stop suitably arranged to provide a rest forsaid weight when in normal initial position, and means to adjust said stop to vary the initial position of the operating jaw with relation to the pressure cam whereby the jaw will be engaged thereby during a greater or less period to vary the length of time during which the pressure is applied.

7. In a paper cutting machine, a clamp, a clamp shaft, connections between the clamp and the shaft, a pressure device on the clamp shaft operated whereby a clamping pressure is produced upon the work by the clamp, said pressure device comprising an operating case, friction disks arranged within said case and secured to the clamp shaft, ratchet wheels suitably journaled in frictional engagement therewith, an operating jaw pivotally carried by the pressure case, pawls carried by said case in position to engage the ratchets, connections whereby said pawls are thrown into engagement with the ratchet teeth on the rocking of the jaw, a drive shaft, a pressure cam arranged thereon in position to engage said jaw to cause the engagement of the pawls and rotation of the case, a weight carried by the pressure case to return said case to normal initial position, a stop rest engaged by said weight when in initial position, a notched securing segment arranged on the frame, a forwardly extending lever from said stop rest, a spring pin carried by said lever to engage the segment notches tov secure the lever in its adjusted position whereby the position of the stop rest may be adjusted to vary the initial position of the pressure case and the relation of the operating jaw to the pressure cam to produce the pressure during a longer or shorter period. i

8. In a paper cutting machine having a knife and a clamp to cooperate with the knife during the cutting operation, a drive shaft, connections between the drive shaft and the knife, to operate the knife a. clamp shaft, connections between the clamp shaft and the clamp to lower the clamp upon the rotation of the clamp shaft, a lug member suitably journaled on said shaft, a lug on said member, an opposing lug secured on the clamp shaft to be engaged by said first lug upon the rotation of the lug member, operating means to engage said lug member whereby said member is rotated to lower the clamp by the engagement of the lugs, said operating means being arranged to be thrown out of engagement when the lug member has been returned to its initial position out of engagement with the clamp shaft lug and means to insure the reengagement of the operating means.

'9. In a paper cutting machine having a knife and a clamp cooperating with the knife during the cutting operation, a drive shaft, connections between the drive shaft and the knife to operate the knife, a clamp shaft, connections between said clamp shaft and the clamp to lower the clamp on the rotation of the clamp shaft in one direction, a lug member suitably journaled on the said shaft, an internal lug carried by said memher, an opposing lug secured on the clamp shaft to be engaged by said first lug upon the rotation of the lug member in the direction to rotate the clamp shaft to lower the clamp, said lug member having gear teeth suitably arranged on its periphery, an operating shaft provided with a spiral thread suitably journaled to engage said gear teeth, said gear teeth being omitted from a portion of the lug member periphery whereby the teeth will be thrown out of engagement with the spiral thread when the member has been returned to initial position with the lugs out of engagement, a pin on said member and a spring adapted to then engage said pin, to insure the rengagement of the gear teeth and a hand lever carried on the operating shaft whereby said shaft is rotated to lower the clamp.

10. In a paper cutting machine having a knife, and a clamp to cooperate with the knife during the cutting operation, a drive shaft, connections bet-ween the drive shaft and the knife to operate the knife, a clamp shaft, connections between the clamp shaft and the clamp whereby said clamp is lowered upon the work on the rotation of said shaft, independent supporting means for the clamp arranged at either end thereof whereby the clamp is held in elevated position, means to depress the clamp support sufficient to permit ,the lowering of the clamp, upon the work by gravity, a pressure device on the clamp shaft, means to operate said pressure device to produce a clamping pressure upon the work during a longer or shorter period, a foot treadle suit-ably hung, connections from said treadle wherebythe clamp shaft may be rotated independently to lower the clamp and pressure produced thereon by said treadle, a hand operated member journaled on the clamp shaft, a lug carried by said member, and an opposing lug secured to the clamp shaft to be engaged by said first lug when rotated in the direction to cause the lowering of the clamp.

11. In a paper cutting machine the combination with the knife and the clamp to cooperate with the knife in the cutting operation, of independent supporting means for the clamp collectively to exertsuflicient pressure to elevate the clamp and mechanism independent of the clamp connected to depress part of the sustaining means to permit the clamp to lower and rest upon the work by gravity.

12. In a paper cutting machine, the combination with a suitable frame and a table thereon, a knife, a drive shaft, connections between the knife and the drive shaft whereby the knife is operated, a clamp, a pressure device, connections therebetween to lower the clamp and produce press-urethereon, a pressure actuating member, an operating member for the pressure device actuated by said actuating member, said opera-ting member being supported to be adjust-able relative to the actuating member whereby the application of pressure on the pile is adjusted for a longer or shorter period.

' 13. In a paper cuttingmachine, the combination with a suitable frame and a table thereon, a knife, a drive-shaft, connections between the knife and the drive-shaft whereby the knife is operated, a clamp, a pressure device, connections between the pressure device and. theclamp to, lower the clamp, a pressure cam, an operating member for the pressure device arranged to be engaged by the cam: to produce the clamping pressure" and means to adjust the position of said operating member relative to the pressure cam whereby the application of pressure on the pile is adjusted for a longer or shorter period.

14. In a paper cutting machine, the combination with a suitable frame and a table thereon, a knife, a drive-shaft, connections between the knife and the drive-shaft whereby the knife is operated, a clamp, a pressure device, connections between the pressure device and the clamp to lower the name to th1s specification 1n the presence of two subscribing witnesses. engaged by the cam to produce the clamping pressure, means to adjust the normal 5 position of'said' operating member relative l to the pressure cam thereby to adjust the application of the clamping pressure for a clamp, a pressure cam, an operating member for the pressure device arranged to be longer or shorter period and means to secure the parts in adjusted position.

15; In a paper cutting machine, the combination with a suitable frame and a table thereon, a knife, a drive-shaft, connections between the knife and the drive-shaft whereby the knife is'operated, a gage for the work slidably arranged on the table, forwardly extending gage-fingers on the gage and said table having slots into which said fingers: extend and the edges formed by' said grooves being rounded to prevent indentationof the work.

16;.In a paper cutting machine, the combination with a suitable. frame and a table thereon, a knife, a. drive-shaft, connections between the knife and the drive-shaft whereby the knife is operated, a clamp to cooperate with the knife in the cutting operation, independent supporting means forthe clamp; collectively to exert sufficient pressure to elevate the clamp, mechanism independent of the clamp connected to depress part of the supporting means to permit the clamp to lower and. rest upon the work by gravity, a gage for the work slidably arranged on the table, forwardly extending gage fingers on the gage and said table having slots into which said fingers extend and the edges formed by said grooves being rounded to prevent indentation of the 'work- In testimony whereof'I'ha-ve signed my DARIUS T. WADHAMS.

WVitnesses F. K. BARNHART, Ins. Pl KANE.

Copies of this patent may be obtained for five cents each, by addressing" the tiommissioner' of Patents.

Washington, D. G. a

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