US1778483A - Machine for operating upon weblike material - Google Patents

Description

Oct. 14, 1930. F. M. CARROLL ,778,433

MACHI-NE FOR OPERATING UPON WEB LIKE MATERIAL- Filed June 15 1925 5 SheetS -Sheet l N mi Oct. 14, 1930. F. M. CARROLL 1,773,483

MACHINE FOR OPERATING UPON WEB LIKE MATERIAL Filed June 15 1935 5 Sheets-Sheet 2 N 1 1 3 g N \o b. 31 11.1 13 Y i :F y i e 5 i M 5 i \EE 5 I h 3% h I h I il 1 will A g flfl :i i

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MACHINE FOR OPERATING UPON WEB LIKE MATERIAL Filed June 15, 1925 5 Sheets-Sheet 5 Swuemto'c 951? {up M/r O WM Oct.- 14, 1930. F. M. CARROLL 1,778,483

I MACHINE FOR OPERATING UPON WEB LIKE MATERIAL Filed June 15, 1,926 5 Sheets-Sheet 4 Oct. 14, 1930.

F. M. CAR-ROLL MACHINE FOR OPERATING UPON WEB LIKE MATERIAL Filed June 15, 1925 5 Sheets-Sheet 5 awuemtoz w d W $351; mew

Patented Oct. 14, 1930 i FRED CARROLL, OF YONKERS, NEW YORK I MACHINE FOR OPERATING UPON WEBLIKE MATERIAL F FICE Application filed June 15, 1925, Serial No. 37,015, and in Germany November 24, 1922.

This invention relates to printing machines, and is in part a continuation of my application upon tabulating card printer, Serial No. 552,654, filed April 14,. 1922,

which has resulted in Patent No. 1,563,014, Nov. 24, 1925, and which relates to card printing machines and, from a still more specific aspect, relates to machines for printing tabulating cards, i. e., cards to be printed and employed in connection with tabulating machines of the general type illustrated in the United States Patent N 0. 1,087,061, 'February 10, 1914, H. Hollerith, and numerous other patents. l One of the principal objects of the invention set forth in my aforesaid Patent No. 1,-

563,014 is to provide a printing machine of increased efliciency and economy and adapted to receive blank material and to discharge accurately. printed cards, of accurate size and shape.

An object of the present invention is to provide improved means for severing a continuous web of material into smaller units accurately and without interruption of the continuous feeding of the material, a provision which is of notable utility when embodied in the structure of arotary print ing machine of the type forming the subject-matter of my aforesaidap'plication, in which certain of the features of the present application are set forth with sufficient clearness to permit their embodiment in rotary printing machines by those skilled in the art, but as these and other desirable portions of my invention are of equal utility for employment in other fields, my present application illustrates and sets them forth in somewhat greater detail, and they are herein claimed in this broader aspect of their more general utility.

Another object of the present application is to provide improved means adapted to re- 5 ceive cards and including shearing devices for severing a cornerfrom each card, and means for holding each such severed cornerupon I one of said shearing devices where it is clear of the remaining card material.

Referring to the drawings which illustrate what I now consider a preferred form of .machine:

Fig. 1 is a vertical sectional view of a portion of a machine of the type shown in my aforesaid application of which this application is a continuation in part.

Fig. 2 is a View in diagonal section, on an enlarged scale, taken on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary view in side elevation on a larger scale of certain of the parts illustrated in Fig. 1.

Fig. 4 is an enlarged detail sectional view of therotary platen and severing mechanism. shown in Fig. 1; Figs. 5, 6 and 7 being views in the same vertical plane as Fig. 4, showing the parts in various positions of their cycle of operation.

Fig. 8 is a fragmentary detail view of the rolls for severing a corner from the cards.

Fig. 9-is a sectional view on the line 9-9 of Fig. 10.

Fig. 10 is a longitudinal sectional view of the rotary dies shown in Fig. 8.

Fig. 11 is a vertical sectional View of the driving means for said machine.

wedge 5.

In the rotary printing machine illustrated, the arcuate portion 2 is constituted by a rotatable cylindrical platen, and three shear members 3 are shown, spaced at equal circumferential distances, so that as this rotary platen turns upon its shaft 6, equal portions of the Web lV are measured off serially for severance and each such portion is severed in turn by a suitable reciprocal shear member 7, cooperating with that member of the series of platen-carried shear members 3 which is then presented inappropriate juxtaposition for the shearing operation.

. In pursuance of the invention, the shear member 7 is moved into engagement with each shear member 3 successively as the latter arrives at the shearing position, to effect severance of the webyand at the same time the member 7 is given a mov'ement'of translation around the arcuate surface 2 in a curved path conforming thereto, so that the severance is accomplished without interrupting the continuous feeding of the web W forward around thearcuate surface.

In accordance with an important object of the invention, this forward feeding in regular progression is effected or facilitated by a device which provides also means 8 for engaging the web're'currently at the parts w thereof which become successively the leading end after severance, and the holding means holds each such part in close juxtaposition with the platen for severance, and therafter prevents escape of the aforesaid leading end w while permitting free withdrawal of the card or unit to which has been divided from the web.

The shear 7 and the holding member.8 are withdrawn successively from severing and binding action and are retracted automatically together into position for recurrent performance of the holding and severing operations upon succeeding sections of the webW, this transference of the members 7 and 8 being accomplished recurrently by any suitable means, while the forward feeding of the web NV, thus cleared, continues, under operation of feeding devices the preferred form of which will bedescribed briefly here- I inafter, inasmuch as a more detailed description thereof will be found upon reference to my aforesaid Patent No. 1,563,014. in a rotary printing machine of the type illustrated, or in machines of like character, the

operating parts are desirably organized in conjunction with the shaft 6 of the rotary platen, which is shown in Fig. 11 as having a worm-gear 9 in mesh with a Worm 10 on a shaft 11 coupled at 12' to the shaft 13 of anelectric motor 14, by which the platen is rotated continu'ouslyin the direction of the arfow X, Fig. 4.

Also mounted on the shaft 6 is a sleeve 16 having eccentrics 17 and 18 fast thereon, and a gear 19 forming part of a chain of gears 19, 20, 21, 22 and 23, actuated by the shaft 6;

and upon the eccentrics are straps 24 formed as part of a frame 25 which has one lever arm forked at 26 to receive a block 27 on a stud 28 mounted on the frame part 29, while another arm 30 serves as-the support for the reciprocal shear member 7 and the holding member 8 with their associated parts.

The shear member 7 comprises a long flat blade having end sockets'31 to receive pins 32 seated against. springs 33 in bearings 34 formed on the arm 30, brackets 37 and 38; By

When the severing'mechanism is embodied I withdrawing the pins 32 the shear 7 may be taken out or replaced. It is normally held in its uppermost position (see Figs; 4-7) by the U-shaped spring 35 secured by screws at 36 to the bracket 37 of the lever arm 30; and this bracket and the similar bracket 38 at the other end of arm 30 are provided with sto s 39 to limit the upward swing of the shear and the shear slots 4 in-platen 1 have beveled walls. 41 to aid in securing firm shearing contact between the shear 7 and shears 3.

The holding member 8 preferably takes the form of a U-shaped clip embracing the shear member 7 and sharing its rocking movements around the pivots 32, but capable of independent sliding movement, having a forward abutment portion '42 adapted to be held toward the arcuate surface 2 'of the platen l in position to bind the web VJ directly adjacent to the shear 3, this binding engagement being-of a? yielding character, under the action 9f a leaf spring 43 seated at 44 on the brackets 37 and 38 (see Fig. 2). a

For the sake of clearness, the web does not appear in Figs. 2, 4, 5, 6, and 7, but is shown clearly in Fig. 1, which illustratesthe parts at the completion of a severing operation with the rotary platen 1 running forward continuously. The web W is derived from any suitable source, such as the roll excess of the peripheral speed of the rotary platen, the rolls being spaced to permit slip in feeding, so as to avoid over-running, and t the machine illustrated is provided with a printing roll 54 and suitable inking mechanism 55, which need not be described in detail, except to note that the printing roll preferably cooperates with the platen at a region not far from the point ofseverance.

In operation, as the shaft 6 is rotated by the motor 14 the platen 1 is turned andthe eccentrics 17 x and 18, cooperating with the block 27 in the fork 26, cause the frame 25 to oscillate in an elliptical path which is indicated in dotted lihes in Fig. 5..

In Fig. 4 the parts are shown in detail in the severing position shown in F ig. 1, with the shear 7 at its extreme inward position and the holding member 8 likewise at the inner position of its orbit, having its abutment 42 pressed toward the platen surface 2'in position to bind the leading end ofthe web (not shown) When the eccentrics 17 and 18 have turned into the positionindicated in Fig. 5, the shear 7 has been withdrawn from engagement with the severed end of the web or card, and the abutment 42 of the holding member 8still binds to the platen the leading end of the fresh unsevered portion of web Y which is now being printed-by the printing roller 54.

Atthis phase occurs the delivery of the severed card orunit w to the mechanism shown in Fig. 3, which embodies the portion of this invention relating to the clipping of a corner from the severed card, an operation which will be described duly, after completing the description of the cycle of movement of the movable shear 7 and the holding means 8.

In Fig. 7 the position of the parts is approximately the same as in Fig. 5, but a portion of the holding member 8 is broken away to show the manner in which the shear 7' tilts as the shear 3 continues its movement downward with the platen part 2. By this provision, which the spring permits, any injury of the shear 7 by shear 3 is avoided, and in Fig. 6 the shear 7 is shown as about to come clear of the finger of shear 3, the cutting edge of shear 7 having already left the cutting edge of shear '3, and the holder 8 having likewise been carried back by the movement of arm 25 under the action of eccentrics 17 and 18, so that when the arm 25 starts to move upward in its orbit in the direction of the arrow in Fig. 5 there will be no interference with the leading end of the severed web, which will run down between the shears ready for the holder abutment 42 to enter into binding engagement'w-ith it when the arm 25 has passed the upper extreme of its'orbit and is drawn in toward the platen 2 byaction of the eccentrics 17 and 18,

repeating the phases. of the cycle, in coopera tion with the next member 3 of the series of platen-carried shear members, and with outinterruption in the forward movement of the web W. A

Having thus described the preferred structure of severing mechanism and its operation, it is to be understood that the same may be utilized in any field for which the improvements are adapted by their nature, and the cards or other units severed from the web may be delivered in any suitable manner for use or for further treatment, as for example forseverance by the improved corner-clipping mechanism now to be described.

Before any card has been severed from the remainder of the material its leadingedge will have passed preferably between rollers 57 and 58, being gripped thereby. For reasons hereinafterstated these rollers are preferably so driven and so timed that they will present the same points on their peripheries to any card entering between them as they do to any' other card so entering but their linear peripheral speeds are slightly in excess of that of the drum 1. It will be seen that these two requirements are "not inconsistent and are readily obtainable, the first being a function of angular velocities and the second a function of angular velocities of rolls 57 and 58 and the radii of the latter. I

shall now proceed to describe the driving I means for the rollers 57 and 58, having specific recourse to Figs. 1 and 8 to 11 for this purpose.

The rollers 57 and 58 are each secured to a corresponding one of the shafts 60, 61, suitably journaled in the frameof the machine. Each of the shafts 60, 61 has secured thereto a corresponding one of identical gears 62 and 63 which mesh with each other. The gear 63 meshes also with a suitably journaled idler gear 64: on a shaft 65 which has a gear 66 which in turn meshes with and is driven by the gear 23. The rollers 57 and 58 are preferably provided with card-corner-clip- A plng devices. Before proceeding to describe these devices, I shall describe the means for conveying the cards to the receptacle or tray 71 By inspecting Figs. 1 and 3 it will be seen that thecards passfrom the rollers 57, 58 over a plate 67, suitably secured to the frame of the'mac'hine, and thence between rolls 68 and 69 into suitable stacking mechanism 70 and a tray 71, secured to and carried by the bracket 72. i

As mentioned above, the rollers 57 and 58 are preferably provided with devices for clipping the corners of the cards or card material. One form of such device is illustrated in Figs. 3, 8, 9, and 10 in detail. The roller 58 is there shown provided with an insert 76 of steel or other suitable material and having a raised'portion 77 providing a diagonal cutting edge 78. The roller 57 is provided with an insert 79 having a raised portion 80 and diagonal cutting edge 81 which arecomplementary to the elements 77,

78. The design is such that one of the two trailing corners of each card, entering between the rollers 57, 58, is clipped or sheared off by the cooperating cutting edges 7881. In order to insure that these clippings will not be thrown to such'position as to injure the machine or the cards, I preferably pro vide means for holding each such clipping to one of the rollers 57 58 until it is in proper position to be discharged therefrom. While A now preferred form of such means is il-- lustrated and may be constructed substantially as follows. The shaft of one of the rollers 57, 58, in the present case the shaft 60 of the roller 57, is provided with a duct 82 the shaft 60 and forming therewith a valve.

as clearly indicated in Fig. 3. The member 88 is provided with ducts or passages 89, 90, leading from the ports 86, 87 to upper and lower ends respectively of a cylinder 91 of a pump which is suitably secured to the frame of the machine. It will be seen that when the .parts are in the position shown in Fig. 3, and indeed as long as the port 85 registers with the port87, communication is established between the port 83 and the lower part of the cylinder 91. At this time the insert 79 moves from the position shown in .Fig. 3 to a position below the axis of the roller 57. .When the insert 79 and its port 83 are substantially directly below the axis of the roller 57, communication between the lower part of the cylinder 91 and the said port 83 is cut ofl", and communication between thev upper end of the cylinder and the port 83 is established through the following passages;

898685828483. Mechanism is provided for automatically-causing the pump to create a suction or negative pressure at the port 83 when the ports 8587 are in cormmunication and for providing a positive pressure at the port 83 when the passages 85-86 communicate. I shallwnow proceed to describe the particular form of such mechanism illustrated in the drawings.

The shaft 61 has secured thereto a cam 92 adapted to enga e and operatethe arm 93 of a bell-crank ever pivoted ,at 94 on-the frame of the machine. The other arm 95 of the bell-crank is connected at 96, by a suitable pivotal connection with the piston rod 97 of the pump. The rod 97 is provided with a shoulder portion (Fig. 3) adapted to en gage the lower side of and move the piston ton 98 compresses air in the upper part of the pump cylinder it will be appreclated that -whenthe ports 8586 communicate a blast and into a suitable chute or receptacle 100. w

The above described cycle is repeated as each clipping of the corner of a card is effected.

What I claim is p 1. A machine for severing a continuous web or sheet of material into similar units, comprising in combination a rotary platen, means forwzausing 'material to .travel around and in contact with said platen, means for preventing slip of the material with respect to said platen prior to shearing, a knife blade directed towards the platen, and means for moving said blade towards and into cooperative shearing relation with theplaten while advancing the blade peripherally of the platen and -for withdrawing said blade from the platen after the shearing operationwhile moving the blade peripherally of the platen and for returning the blade to its initial position in the cycle while maintaining the blade constantly directed towards the platen.

2. A machine for severing a continuous web or sheet of material into smaller units,

compiising in combination, a rotatable plat= en, means for supplying material to said platen, means for continuously rotating said platen, means for cutting said material into card lengths before it leaves saidplaten, saidlast named-means comprising a knife and means for reciprocating said knife towards and away from said platen and for moving said knife alternately in the same and in an opposite direction to the movement of said web transversely of the line connecting its extremes of reciprocatory movement toward and away from the platen.

3. A machine for severing a continuous web or sheet of material into smaller units comprising, in combination, a rotary platen, means for supplying material thereto, means for cutting said material into card lengths, said last mentioned means comprising a shearing couple of which one element is carried by said platen and the other element of which is movable toward and away from the first named element, and means comprising a cam lug carried by said platen for engage: ment with said second named element to guide the same between the cam lug and firstnamed element into shearing position with respect to said first named element.

4. A machine comprising a rotary platen carrying a web of material, a plurality of shearing elements carried by the platen, a single knife cooperating with each of the shearing elements in turn at a shearing position for shearing the material into lengths,

means for guiding the knife into shearing relation with each succeeding shearing element, and means for clamping the material during shearing at apoint adjacent the shearing position.

5. In a machine .for severing a continuous Web or sheet of material into smaller units,

platen, means for applying the web of mate'- rial to said platen and v for guiding the web partially around the same, severing means positioned exteriorly of the platen, and means for oscillating the severing means adjacent the periphery of the platen and to reciprocate it 'to and from said periphery while constantly maintaining the cutting edge of the severing means directed towards the platen.

6. In a machine for severing a continuous web or sheet of material into smaller units,

said machine being characterized by a rotary platen, means for supplying a web of material to said platen, a plurality of knife elements' carried by said platen, movable knife means mounted independently of said platen and adapted for cooperation with the aforesaid knife elements on the said platen, and means for imparting a movement of translation to the movable knife means substantially in the same direction as the direction of the movement of said platen at the time ofcutting engagement whereby cutting may be effected of the material intervening between the platen carrying knife elements and the movable knife means while the latter are both moving at substantially the same velocity.

7. In a-machine for severing a continuous web or sheet of material into smaller units, said machine being characterized by a platen having an arcuate surface and by means for delivering said web continuously around the periphery of said platen, the combination therewith of means acting recurrently to sever said web at a predetermined point in its travel ground said arcuate surface, means.

arranged to accompany said web around a v portion of said platen in a coaxial arcuate path, engaging said web recurrently at the parts thereof which become successively the leading end after severanceand holding each such part in closevjuxtaposition with said platen for severance, and means to actuate said holding means for said holdingopera- 7 tion and to retract the same from holding engagement with the web and move said holding means in a direction opposite to the 5 movement of said platen to the appropriate region to initiate each-such holding operation. i 8. In a machine for severing a continuous Web orsheet of material into smaller units,

said machine being characterized by a rotary platen and means for rotating the same, the combination of means for feeding a continuous web ofmaterial around the periphery of said platen, means associated peripherally' with said platen for severing said web periodically at intervals measured by the peripheral arc subtended by a given radius of said platen in traveling through a predetermined number of degrees, holding means said maclilne being .provided with a rotary adapted to move-peripherally in contact with said web during each such period of severance, acting to hold the web at the time of severance, and means to withdraw said holding means from such contact and move the same counter to the direction of travel ofv said web for engagement with an unsevered portion of the same.

9. In a machine for severing a continuous Web or sheet of material into smaller units, said machine being characterized by a plat-en having an arcuate surface and by means for delivering said web continuously around the periphery of said platen, the combination therewith of a device including severing means and holding means arranged to accompany said web around a portion of said-platen in a coaxial arcuate path,said severing means acting recurrently to sever said web at a predetermined point in its travel around said arcuate surface and said holding means engaging' said web recurrently at the parts thereof which become successively the leading end after severance and holding each such part in close juxtaposition With said platen for severance, and means acting alternately to actuate said device for said holding and severing operations and to move. the same counter to the direction of travel of said platen -to the appropriate region to initiate successive holding and severing operations.

10. In a machine for severing a continuous Web or sheet of material into smaller units, said machine being characterized by a platen having an arcuate surface and by means for delivering said web continuously around the periphery of said platen, the combination therewith of a lever mounted to oscillate concentrically relatively to said arcuate surface, and adapted to reciprocate relatively thereto, having a shearmember acting recurrently to sever said web at a predetermined point in its travel around said arcuate surface, said lever being arranged to move said shear member to accompany said web around a portion of said platen in a coaxial arcuate path, and having holdingmeans for engaging said web recurrently at the parts thereof which become successively the leading end after severance, holding each such part in close juxtaposition with said platen for severance, and means to actuate said lever and its shear member and holding means for said holding operations and severing operations, and to retract the same from holding andsevering engagement with said web and to return said lever to the appropriate region to initiate successive severing and holding operations. I

11. In a machine for severing a continuous webperiodically at intervals measured by the peripheral distance between said platen and said shear members, said severing means acting successively in conjunction with said platen carried shears and being adapted to moveperipherally with saidweb during each such period of severance, means associated with said shearing means to engage and hold the web at the time of severance, and means to withdraw said holding and severing means from such contact and move the same counter to the direction of travel of said web for successive engagement with unsevered portions ofthe same. v v

12. In combination with a rotary platen and means for supplying a web of material thereto, a device reciprocating in a direction angular to the axis of said platen and having means to treat the material carried by the platen during the continuous forward rotation thereof, said reciprocating device being' adapted to act upon the web at one region thereofwhi'le moving synchronously therewith, and after acting on said web-to move in a direction counter to the movement of the platen to act on the web. at-another region thereof.

13.' In combination, a rotary shearing member, an elongated shearing member having a cuttingdevice at its forward end, means for supporting the elongated member at the opposite end, and =meansfor moving said member through a shearing cycle comprising a movement from an initial position towards the rotary member to elfe'ct shearing cooperation between the cutting device and rotary member, a movement of the elongated member in the direction'of the rotary member during shearing, and a movement of the elongated shearing member away from the rotary member and back to initial position, said elongated'member being constantly main-. tained during said shearing cycle with its forward end directed towards the rotary member,

14., The combination in a, web-severing mechanism, of a platen having an ,arcuate surface with a shear member mounted there- 7 in and a reciprocable shear membermounts ed on an oscillatable support independent of said-platen adjacent to said surface to coop erate with said platen shear member.

15. The combination in a web-severing mechanism of'a rotary platen provided with an arcuate surface adapted to support a continuous'ly moving web for treatment, and having a shear-membermounted therein, and a reciprocable shear-membermounted on a support arranged to oscillate relative to said arcuate surface and to move toward and away from said web, whereby said shear-members.- are brought into cooperative relation recurrently to sever successive portions from said web, moving therewith during ach severing operation and moving counte 'ise' between the severing operations. j

16. In a web-severing machine having cooperating shear members one of which is reciprocable and a support for said reciprocable shear member the combination with said reciprocable shear-member of a holding device having an abutment portion adapted to engage and hold the web at times and having a flange to embrace said reciprocable shear member loosely, and a spring between said holding member and support tending to maintain said holding engagement while permitting reciprocation of said shear member.

17..In a web-severing machine'having cooperating shear members one of which is reble shear member the combination with said reciprocable shear-member of a holding device having an'abutment portion adapted to engage and hold the web at times and having ciprocable and a support for said reciprocaa flange to embrace said reciprocable shear. N

ber being arranged to move pivotally upon said support to accommodate the peripheral movement of said platen-carried shear.

18. In a webtreating machine having cooperatingshear-members as set forth in claim 17 a support for the reciprocable shear member provided with means to permit pivotal movement of said shear-member upon said. support and relatively to said platen-carried shear-member during their engagement, and a means to maintain said engagement yieldingly and to permit ready removal of said re-, ciprocable shear from said support, said means comprising one or more spring-pressed pivot pins carried by said support and arranged to enter sockets in said reciprocable shear, a separately formed lea'fspring car- 'ried by said support and tending to rotate said shear about its pivotal axis, and a stop or stops carried by said support to limit said rotative movement of said shear, saidpivots and spring constituting a unitary structure with said support from which said reciprocable shear is removable freely.

- 19. A web-severin machine having coopcrating platen-carrie and reciprocable shearmembers as set forth in claim 15, said platencarried shear-member having a projection.

with an inclined face to engage and position said reciprocable shear member prior to shearing action, and said reciprocable shear meixrher having an inclined portion to engage aportion of the platen structure to cause close shearing engagement of said shear members with each action.

20. Shearing mechanism comprising coacting shearing members, a supportfor each member, one of said members being swingable on its support, said swingable shear member reciprocating relatively to the other, and a 10 holdingdevice for the material to be severed,

said device comprising a holding member mounted adjacent to said reciprocating shear member and adapted to engage and hold said material independently of its engagement by said shear member.

21. Shearing mechanism comprising coacting shearing members a carrier for each member, avsupport on Whichone of said carriers is reciprocated, relative to the other carrier, said other carrier moving relatively to said support, and a holding device for the material to be severed, said device comprising a holding member carried by said reciprocating carrier and adapted to engage and hold said material independently of its engagement by the shear member carried by said reciprocating carrier.

22. In a web-severing machine a rotatable shaft, a cylindrical platen carried thereby and provided with a shear member, a frame journaled uponsaid shaft and adapted to oscillate thereupon, and eccentrics geared to said shaft and connected with said frame to cause oscillating movements thereof co-ordinated with the rotation of said platen; said frame having arms provided with opposed spring-- pressed centers, a reciprocal shear-member mounted pivotally between said centers, a springcarried by said frame and tending to rotate said shear about said centers, means on said frame to limit said rotation of said shear, a U-shaped holding member embracing said shear and supported loosely thereby, having an abutment portion to engage the Web, and a spring mounted between said arms in engagement with said U-shaped member tending to move the same normally into engagement with said web, independently of the movement'of said shear, said shear and U-shaped member and their associated parts constituting with said frame a unitary structure movable toward and away from said platen, and oscillating to and fro aboutthe periphery thereof, when said shaft is rotated, to effect recurrent shearing action upon said web with synchronous movements of said shears peripherally therewith, and alternatingretractive movements of said frame struc- 0 ture.

23. In a web-severing machine a rotatable shaft, a cylindrical platen carried thereby and provided with a shear member, a frame journaled upon said shaft and adapted to oscillate thereupon, and eccentrics geared to posed spring-pressed centers, a reciprocal shear-member mounted pivotally between said centers, a spring carried by said frame and tending to rotate said shear about said centers, means 'on said frame to limit said rotation of said shear, a U-shaped holding member embracing said shear and supported loosely thereby, having an abutment portion to engage the Web, and a spring mounted between said arms in engagement with said U-shaped member tending to move the same normally into engagementwith said web, independently of the movement of said shear, said shear and U-shaped member and their associated parts constituting with said frame a unitary structure movable toward and away from said platen, and oscillating to and fro about the periphery thereof, when said shaft .is'rotated, to effect recurrent shearing action upon said web with synchronous movements of said shears peripherally therewith, and alternating retractive movements of said frame structure, said U-shaped member and reciprocal shear 'member being removable from said frame while the latter remains in place.

24- In combination, a member having a cyclical movement and adapted to support a Web of material, a device provided with a cutter at the forward end, means for moving said device to and from said member several times during one cycle of movement of said member to effect a plurality of shearing operations on the web by said cutter, and means for mounting and guiding said device during the several shearing operations and during the period between said operations with its forward end constantly directed towardssaid member.

In testimony whereof I hereto affix my sig-

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