US246371A - cottrell - Google Patents

Description

m e e h s n 8 A 8 h s 4 Th. L E R T T 0 G B G (No Model?) SHEET DELIVERY APPARATUS FOR PRINTING MAGHINES. No. 246,371.

Patented Aug. 30,1881.

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(No Model.)

0. GOTTBE-LL. SHEET DELIVERY APPARATUS FOR PRINTING MAUHINES.

No. 246,371. Patented Aug. 30,1881.

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(No Model.) 4 SheetsShet 3.

C. B. GOTTRELL.

SHEET DELIVERY APPARATUS FOR PRINTING MAOEINES. No. 246,371. Patented Aug. 30,1881.

(No Model.) 4 Sheets-Sheet 4..

0. B. GOTTRELL. SHEET DELIVERY APPARATUS FOR PRINTING MACHINES. N0. 246,371.

Patented Aug. 30,1881.

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thaws CALVERT B. GOTTRELL, OF WESTERLY, RHODE ISLAND.

SHEET-DELIVERY APPARATUS FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 246,371, dated August 30, 1881,

Application filed January 25, 1851.

To all whom it may concern Be itknown that I, CALVERT B. Oo'r'rRELL, of Westerly, in the county of WVashington and State of Rhode Island, have invented certain new and useful Improvements in Sheet-DeliveryApparatnsi'or CylinderPrinting-Machines, of which the following is a specification.

This invention relates to gripers which are employed to take the sheet from the front of the impression-cylinder of the machine and carry it to and deliver it upon the receivingtable with thelast-printed side upward.

The invention consists in a novel construction and arrangement of and method of operating such gripers, whereby some essential advantages are obtained, among which one of the most important is that the said gripers may be thereby made to take the sheet with greater certainty than the delivery-gripers heretofore employed to take sheets from the front of the impression-cylinder. Certain features of the invention are, however, applicable not only to two-revolution cylinder-presses, but to stopcylinder presses also.

Thcinvention is illustrated in the accompanying drawings, in which Figure l is a side elevation of such of the parts of a two-revolution cylinder printing-press as are necessary to illustrate my invention, the other parts being omitted. Fig. 2 is an end "iew of the delivery-griper shaft and one of its carriages, a portion of the impression-cylinder, and part of one of the ways on which the carriage runs on a larger scale than Fig. 1. Fig. 3 is a longitudinal view of the said griper-shat't and its carriages, partly in section, showing also transverse sections of the ways on which the carriages run on a scale corresponding with Fig. 2. Fig. 4 is a plan corresponding with Fig. 1. Fig. 5 is a transverse sectional view of the delivery-griper shaft and gripers and part of the cylinder. Fig. 6 is an end view of thegripershaft and theprincipal parts of the openingand closing mechanism, illustrating the method of closing the gripers to take the sheet from the cylinder. Fig. is a horizontal sectional view of parts shown in Fig. 6. Fig. 7 is a similar view, illustrating the method of opening the gripers to deliver the sheet on the receiving- Figs. 5, 6, and 7 are on the same scale as Figs. 2 and 3.

(No model.)

A is the main framing of the press; B, the feed-board; O, the impression-cylinder. E is the receiving board or table, arranged at the opposite end of the framing to the feed-board.

The cylinder 0 and the reciprocating typebed may have motion imparted to them by the usual or any suitable means, the cylinder having a continuous revolution, and being fitted, as usual, with gripers for taking the sheet from the feed-board and holding it during the printing. These gripers, being well known, are not represented in the drawings.

D is the delivery-griper shaft or griper-stock, arranged to oscillate in journal-boxes (l (1 provided in two carriages, F F, which are fitted .to slide on the exteriors of fixed parallel upwardly-arched ways G G, which are arranged lengthwise of the press, one on each side thereof, each extending from a point outside of its respective end of the cylinder 0 to a point over or beyond the farthest end of the receivingboard. These ways G G are tubular, and for convenience are made of wrought-iron gaspipe, and are slotted longitudinally on their upper sides for the purpose hereinafter explained. They are supported by brackets e on the cylinder-standards and by standardsf on the receiving-board stand.

The two griper-carriages F F are secured one to each of two wire ropes or other cords or chains a a, each of which passes right through one of the tubular ways G G, and is secured at one end to the periphery of one of two drums or pulleys, H H, on a shaft, I, at the receivingboard end of the machine, and secured at the other end to the periphery of one of two drums or pulleys, J J, on a shaft, K, under the feedboard, passing also over pulleys f attached to the standardsf. The said ropes, cords, or chains are wound upon their respective drums or pulleys H H and J J to a sufficient length to allow them to move thecarriages F F and the gripershaft D on the ways G G from a line nearly over the cylinder to a line over or beyond the back of the receiving-board. The connections I) 1) between the ropes or cords a a and the carriages F F pass through and work in the slots in the tops of the tubular ways, as shown in Fig. 3.

The shaft K of the drums J J is furnished with a pinion, S, which gears with a toothed sector, L, on the upper end of the leverL, which works on a fixed fulcrum, c, and the lower end of which is connected with the rod M of a camyoke, M, which works on the rotary shaft N, and is acted upon by a cam, M on the said shaft in such manner as to cause the sector and pinion to turn the shaft K in a direction to move the griper-shaft carriages from the re ceiving-board toward the cylinder.

The cam-shaft N may be the driving-shaft of the press or any other shaft suitably driven.

The shaft I of the drums H H has a spring, I, coiled around it, and so applied as to tend to turn the said drums in the direction of the arrow shown on one of them in Fig. l, and so to cause the said drums to draw the gripershaft carriages from the cylinder toward the receiving-board.

The delivery-griper shaft D is hollow, and for convenience may be made of wroughtiron gas or steam pipe. Its under side is slotted longitudinally, as shown at 10 in Figs. 3 and 5. At one end it is journaled directly into the box (I of the carriage F, but at the other end it is furnished with a sleeve, g, which is rigidly secured to it by a set-screw, g, as shown in Fig. 3, and which forms thejournal which works in the box dof the other carriage, F. The upper jaws, i t, of the gripers are rigidly attached to the shaft D and only move therewith, and the lower jaws,j j, are hinged to the upper ones by hinges 1', arranged eccentricall y below the shaft, the jaws being therefore arranged and operating in a manner precisely the reverse of that which isusual in delivery-gripers--that is to say, the opening and closing movementbeing made by the under jaw of each, or the one nearest the center of the cylinder, instead of by the upper jaw, or the one farthest from the center of the cylinder.

Springs of various kinds may be employed to close the jaws; but for the sake of convenience I propose to use a simple india-rubbcr band, on, round each pair ofjaws.

To provide for the opening of the jaws, there is a blade-like cam, k, working through the longitudinal slot 10 of the griper-sh aft D, and acting directly against the jaws jj of the gripers, the shaft It of the said cam being within and concentric with 1). One end of the said shaft 7; is keyed into a head, k (see Fig. 3,) which fits as an innerjourna-l within a portion of the sleeve-like griper-shaftjournalg. To the outer end of this head 7: there is secured firmly a laterally-elastic lever, k for the purpose of turning the shaft is independently dfthe grip er-shaft to operate the cam 71 On opposite ends of the sleeve-like journal 9 of the griper shaft D there are rigidly secured, either to the said journal or directly to said shaft, two arms, g 9 (see Fig. 3,) the inner one, 1 being within reach of a pin or projection, 6, (see Fig. 2,) on the corresponding end of the cylinder, near the periphery thereof, and the outer one, 9, being furnished externally with a beveled projection, over which the laterally-elastic lever slips, and under which it catches to lock the cam-shaft L and cam 7;, as shown in Fi 2, in position to hold the gripers open.

The griper-shaft is furnished, as shown in Figs.2, 4, 5, (3, and 7,with an arnnp, on which there is a weight, 1), which exerts a constant tendency to turn the shaft in a direction to force the gripers upward as far as permitted by a projection, 19 on the shaft, and a stop, f, on the carriage F, as shown in Fig. \Vhen the said projection is against the said stop the upper jaws of the gripers have an inclination such as is shown in Figs. 1 and 2, and in bold outline in Fig. 5, which is theinclination which they have atall times except when taking or delivering the sheet; but this weight leaves the gripers free to swing or move downward when sufficient force is applied to turn them and their shaft in opposition to the action of said weight.

For the purpose of unlocking the griperopening cam and allowing the jaws ofthe gripers to close upon the sheet to take it from the cylinder there is attached to a bracket, a, on one of the cylinder-standards, a fixed wedge, a, which is so arranged that the arm on the griper-shaft may pass on one side of it and the turned-out end of the elastic lever 1.7 on the cam-shaft 7; may pass on the other side of it, as shown in Fig. 6*, at the proper time, as will be hereinafter fully described, and that the said lever maybe thereby sprung aside far enough to slip over the projection g on the said arm g, and so leave the gripers to be closed by their springs m.

For the purpose of opening the gripers to liberate the sheet so that it may be deposited upon the receiving-table E, there are provided upon the receiving-boar(l, or upon suitable fixed portions of the press adjacent thereto, as shown in Figs. 1, 4, and 7, two stops f and q, the said stops being so arranged that the upper end of the lever It may first strike the stop j", and the arm 9 may afterward strike the stop (1 as the griper-shaft carriages, gripel shafts, and gripers are about to complete their movement from the cylinder to and over the receiving-table.

The operation of taking the sheet from the cylinder and delivering it upon the receivingtable is as follows While the griper-shaft car riages, with the gripcr-shaft and gripers, are moved by the cam M from the receiving-table toward the cylinder, the gripers are open, and the weight 12, holding the projection on the griper-shaft against the stopp, keeps the upper jaws, i, of the delivery-gripers about the inclination shown in Figs. 1, 2, and in hold outline in Fig. 5, so that the points of the said jaws, when, at the end of the movement of the carriage, they are brought close enough to the periphery of the impression-cylinder to take the sheet therefrom, are some distance above an imaginaryline, a, drawn between the center of the cylinder and the center of the gripershaft, as shown in Fig. 5. The cylinder has now arrived at such stage of its rotation that the opening provided in it for its own gripers is opposite the lower jaws,j, of the open delivery-gripers, which enter the said opening, so that the front edge of the sheet may be brought over them and under the jaws i by the continued rotation of the cylinder. The pin or projection Z on the cylinder has now arrived in contact with the arm g of the griper-shatt, as may be understood by reference to Fig. 2, the said arm being exactly in line with g in that figure. By the continued rotation of the cylinder the pin or projection l, acting on the arm g turns the griper-shaft in the opposite direction to the rotation of the cylinder, but causes the points of the gripers to move in approximately the same direction as the cylinder and at approximately the same speed therewith. Just as the points of the upperjaws, t, arrive at the line 00 so, where they are nearest the center of the cylinder, the lower laterally elastic and flexible turned-out end of the elastic lever k of the cam-shaft is forced, by passing over the wedge at, out beyond the end of the projection g on the arm 9 and the griper-opening cam being thus unlocked, the gripers are closed by the upward or outward movement from the cylinder of their lowerjaws,j, produced by their springs m, the upper jaws being still moving with the cylinder, and both jaws continuingio move with the cylinder until the sheet has been released by the cylinder-gripers, after which, the pin Z having passed by the end of the arm 9 the gripers are allowed to be raised by the Weightp until the projectionp strikes the stop 19 This action of the gripers may be understood by reference to Figs. 2 and 6. The movem ent of the griper-earriages F F along the ways G G toward the receiving-table now takes place so rapidly that the sheet, with its lastprinted side upward, will be kept flying in a horizontal, or nearly horizontal, position from the time it leaves the cylinder until it arrives over the receiving-table, the upward arching of the ways causing it to be carried up so high that it will not fail to clear the inking apparatus between the cylinder and the said table. As the carriages and gripers are arriving near the end of this movement the upper end of the lever k on the cam-shaft comes in contact with and is stopped by the stopf, as shown in bold outline in Fig. 7, and the continued movement causes the said lever to turn the gripers downward without opening them until the lower end of the arm of the gripershaft is stopped by the stop q, after which the slightly-continued movement of the carriage causes the laterally-elastic lever k to press so hard on the beveled side of the projection g on the arm 9 against which it has been rest ing, that it will slip over the said projection, as shown in dotted outline in Fig. 7, and so allow the cam-shaft to open the gripers and leave the sheet free to fall on the receivingtable. The gripers are now locked in an open condition by the lever 70 and projection 9 and so remain during the whole of their movement toward the cylinder, which now takes place, and until the carriages have begun to move back again from the cylinder, as previously described, the wedge n being inoperative as the gripers move toward the cylinder, because it is so low that the arm H, which is then held up with the gripers by the weight 19, passes above it without touching it.

1 will remark, in conclusion, that the movement of the gripers with the cylinder at the time of taking the sheet, instead of being effected by the pin 6 on the cylinder, might be effected by a cam or any other suitable means. I will also remark that the gripers supported in carriages working on ways, as described, might be used in astop'cylinder press, in which case the oscillating movement of the gripershaft to cause the gripers to move with the cylinder might be dispensed with, and in which case, also, the wedge n for tripping orunlocking the gripers to enable them to close might be movable instead of stationary.

What Iclaim as my invention, and desire to secure by Letters Patent, is

1. In a cylinder printing press, the combination, with theimpression-cylinder, of an oscillating delivery-griper shaft and attached gripers and means, substantially as herein described, for imparting to the said griper-shaft at the time of its gripers taking the sheet from the cylinder a motion on its axisin a direction the reverse of the rotary motion of the cylinder, whereby the points of said gripers are caused to move with the cylinder and approximately in the same direction therewith at the time ot'taking the sheet, substantially as herein described.

2. The combination, with the griper-carriages, of the ropes, cords, or chains to a, the drums or pulleys JJ, shaft K, pinion S, sectorlever L L, cam M drums or pulleys H H, shaft I, and spring P, substantially as and for the purpose herein set forth.

3. The combination, with the impressioncylinder and an oscillating delivery-griper shaft arranged in front thereof, of gripers the upper jaws of which, or those farthestfrom the periphery of the cylinder, are rigidly attached to the said shaft, and the lowerjaws of which, or those nearest the periphery of the cylinder, are hinged to the said shaft to and below the axis of the said shaft, substantially as herein described.

4. In a cylinder printingpress, the combination, with the cylinder, of delivery-gripers, an oscillating shaft to which both the upper and thelowerjaws of said gripers are attached, carriages containing bearings for said shaft, an arm on said shaft, and a projection or pin on the end of the cylinder for operation uponsaid arm to produce the movement of both the upper and the lower jaws of the gripers with the cylinder, substantially as herein described.

5. The combination, wit-h a hollow longitudinally slotted gripershaft and attached grip- ITO ers, of a camshaft Working within said gripershaft and carrying a griper-opening cam which works through the slot in said griper-shaft, substantially as herein set forth.

6. The combination, with the hollow longitudinally-slotted griper-shat't and attached gripers and the gri 'ier-openingcam-shaft Workingwithin the said griper-shaft, of a locking device, substantially as herein described, for locking the two shafts together with the gripers open.

7. The combination of the hollow longitudinally-slotted griper shaft D and attached spring-closed gripers, the cam-shaft k, and cam k for opening the gripers, the locking de vice g g h, and the griperbpening stopf, substantially as and for the purpose herein described.

8. The combination of the griper-shaft D and attached spring-closed gripers, the cam-shaft k and cam is, the locking device 9 W, and the stationary wedge 12. for disengaging the said locking device, substantially as herein described.

9. The combination of the griper-shaft and gripers, a cam-shaft placed within the griper shaft and carrying a cam for opening the grip ers. a locking device, substantially such as is herein described, for locking the said shafts together, and a stationary Wedge attached to the framing of the machine for unlocking the said locking device, as herein set forth.

0. B. COTTRELL.

\Vitnesses HENRY '1. BROWN, FREDK. HAYNES.

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