US1319716A - A cobpobationi osi illistois - Google Patents

Description

E. R. LINEBAUGH SHEET FEEDING MECHANISM FOR PRIN'HNG PRESSES.

APPLICATION FILED MAR.17|19I9.

Patented Oct. 28, 1919.

3 SHEETSSHEET 1.

E. R. LINEBAUGH.

SHEET FEEDING MECHANISM FOR PRINTINQ PRESSES.

APPLICATION FILED MAR. 17' I919.

Patented Oct. 28, 1919.

3 SHEETS-SHEET 2 E. R. LFNEBAUGH.

SHEET FEEDiNG MECHANISM FOR PRINTING, PRESSES.

APPLICATION FILED MAR. 17, I919.

Patented Oct. 28, 1919..

3 SHEETS-SHEET 3.

BALtt-BERTGN, OHEG, ASSIGNOR TO THE DIAMOND MATCH COMPANY, {3F CHICAGO, ILLINOIS, CUid-PORATIDN OF ILLINOIS.

SHEET-FEEDING- MECHAHISM Ffilct PiEtl'liTIIifG-PRESSES.

I To all whom if may concern;

Be it known that l, Eowann R. Linnaaocn, a citizen of the llnited States, and resident of Barber-ton, in the county of Summit and State of Ohio, have invented certain new and useful improvements in Sheet- Feeding Mechanism for Printing- Presses, of which the following is a specification.

This invention relates to sheet feeding mechanism for Gordon printing presses and the like; and it has for its object to provide a simple and eiiicient construction and organization of gripper devices whereby is insured a reliable feeding of successive sheets of paper of different qualities and thicknesses. In the form of en'ibodiment of my invention herein illustrated the usual reciprocating gripping frame is provided at its forward portion with two end grippers and a pair of middle grippersfeaeh of said grippers comprising complementary fixed and movable members. Compression springs are associated with the movable members of all the grippers and auxiliary spring devices are associated with the movable members of the middle grippers. l rovision is had whereby the series of movable gripper members are temporarily raised and lowered as and when the gripper frame approaches and reaches the limit of its rearward stroke, whereby a suitably-disposed sheet is received. by the grippers and securely clamped by the combined action of all the springs, preparatory to the feeding of the sheet upon the platen; and whereby when the gripper frame ap- ,proaches the limit of its forward stroke,

the pressure of the compression springs upon the movable grippers is released, while that of the auxiliary devices on the central grippers is maintained to insure the correct positioning of the sheet against the usual end stops of the platen. Means are provided whereby the pressure of the Ltiliary spring devices can be nicely adjusted in order to vary the effective action. of the grippers to meet the requirements of different qualities and thicknesses of paper.

The invention also comprises novel features of construction and combinations of parts which will be hereinafter described and claimed.

in the drawings' Figure 1 is a plan view of a portion of a printing press embodying my invention.

Specification of Letters Patent.

Application filed March 17, 1915*.

Patented that. 2d, 1919.

Serial no. seams.

Fig. 2 is a side elevation of the same.

Fig. 3 is a perspective of the forward end of the gripper frame including the grippers, showing a sheet as engaged by the latter.

Fig. 4 an elevation of the actuatingarm, and i s adjuncts, for the presser bar.

Figs. 5, 6, 7, 8 and 9 are transverse vertical sections as on the correspondingly numbored lines, respectively, of Fig. 1.

Referring to the drawings, 10 designates a platen; 11 an oscillatory support therefor, and 12 a rock-shaftupon which the support is mounted, which shaft is intermittently actuated to effect the timely motion of the platen in respect to the usual reciprocating sheet-receiving position. Meshin with the racks 15 are spaced geanwheels 1'? fast on a transverse shaft 18 having its hearings in the respective sides of the machine frame. this shaft is a gear-wheel 19 in mesh a gear sector 20, the arm of which is mounted on a stud shaft 21 supported at one side-of the machine frame. The sector arm bears .a lateral roll 22 which runs in the cam race of a face cam 23 fast on a continuously driven shaft 24:, which race is of such formation as to efi'ect the oscillation of sector and thereby insure constant back and forth motion ofthe gear-wheels 1'? and the timely reciprocation of the racks of the gripper frame.

The gears 17 are confined in appropriate casings 25 having rearward basal extensions 26 within which the respective racks are mounted for longitudinal reciprocation. The casings are hung on the hubs of the gears 17 to have capacity for slight vertical oscillation; the extensions 26 being provided at their rear with upwardly and rearwardly extending arms 27 hearing suitablydisposed rolls 28 which are held in operative contact with counterpart cams 29 fast on the shaft 24 by the weight of the gripper frame. The contour of the cams 29 is such that before the gripper frame commences its backward stroke the casings are slightly tilted to raise the forward end of the grip per frame and its grippers slightly above the platen; and thus enable them, in their back stroke, to clear the paper imposed on the platen.

The gripper actuating mechanism includes a suitably disposed vibratory presser bar 30 which is adapted in its periodic oscillation to control the operation of the grippers in order to effect the timely gripping and releasing of the paper. This bar 30 is sup ported at one end by a bracket 31 on the frame bar 16 and at the other end by a rockarm 32 which is pivoted to a bracket on the adjacent rack bar. The presser-bar has connected thereto, adjacent the arm 32, a pin 34 which depends through av perforated bracket 35 on said bar, and is provided with a compression spring 36 which, bearing against the under side of the bracket 35 and the headed lower,end of the pin 34, tends to maintain the inner or acting edge of the presser-bar-normally depressed. The arm 32 is provided with 21 depending extension 37 having a hook-like lowerportion 38 for engagement by the forward hooked end 3 of a rod 40 which extends longitudinally of the adjacent rack. The opposite end of the rod is pivotally connected to a dog 41 which is pivotally supported on said rack. This dog is provided with a tailpiece'42 which is adapted to bear upon the horizontal floor of the casing at certain intervals-in the travel of the gripper frame and thus maintain the rod in a position with the rockarm slightly retracted in opposition to the action of the spring 36. When in the rearward movement of the gripper frame, the dog escapes the floor of the casing said rod released to free the presser bar from restraint, which condition is maintained until the dog, during the succeeding forward stroke of the gripper frame, again engages and rides upon the floor of the casing.

A horizontally disposed bar 43, which is pivoted at its rear end to the supporting frame, as at -14, overhangs the sheet when the latter is under the control of the suction boxes; the free end of such bar extending slightly beyond the forward end of the sheet and being tapered to constitute a cam nose 45. (See Fig. 2.) 'This cam bar is provided with an upstanding member '16 bearing at its upper end a'roll 417 in ca operative relation to a cam 48 fast on the shaft 24, which cam is appropriately shaped to effect the periodical raising and lowering of the bar 43 in order to shift its nose 4-5 into and out-of the-path of a laterally proemployed, viz: two end grippers jectiug stud or roll 49 on the rock-arm 32 I \Vhen the roll of the gripper mechanism. 1s 1n engagement with the cam bar and the latter is raised as ust described the grippers are opened to receive the forward edge of yond the stops and releasing the positioned sheet against the stops.

' The parts above referred to, excepting the sheet as the latter is drawn grippers, are of known construction and operation.

In the present instance four grippers are (A) and a pair of intermediate grippers (B). Each of the grippers comprises avertically bored housing 51 which is adjustably secured by a screw 52, or the like, t the cross-bar 16 of the gripper frame. Vithin the bore of the housing is a vertically movable gripper member 53 which co-act-s with a fixed gripper member 54 constituted by the foot of the housing. The member 53 is formed with a vertical socket for the reception of a pin 55 and a compression spring 56, which latter, encircling the pin, bears against the bottom of the socket and the head of the pin. The upper portion of the movable gripper member extends somewhat above the head of the pin and is offset to afford a notch into which the lower or acting edge of the presser bar freely extends, directly over thehead of the pin. Thus the presser bar, according to its angularity depresses the pin to insure by rivets or studs 59. The strip is perforated intermediate its ends for the free passage of a vertical supporting bolt 60' to which the strip is clamped by meansof a pair of nuts 61 screwed on the bolt. The bolt extends loosely through a guide bracket 62 on the bar 16, and is normally depressed by the actionof a suitably-disposed com- ,pression' spring 63 which bears at its respect ve ends against the bracket and the bolt head; the tendency and effect of said spring 6.3 being to draw down the body of the resilient strip, medially of its ends, and thus transmit through the latter a uniform yielding pressure upon the movable members 53 of i the central grippers. By vertically adjusting thefelampmg nuts on the bolt the tension of the spring 63 can be nicely regulated in order to secure various efiective actions of the resilient strip upon the associated grippers to meet the requirements of different qualities or thicknesses of paper.

Briefly the operation is as follows: As the gripper frame approaches the limit of its rearward stroke the roll 49 on the rock-arm 32 contacts with the nose of the cam bar 43 which has been properly positioned through its connection with the cam 4:8. The arm 82 and the presser bar are thus swung upward against the action of the spring 36 in a way to cause the acting edge of said bar to bear against the overhanging lips 57 of all the movable gripper members and thus bodily lift the latter-t0 open the bite of the grippers for the reception of the end of the sheet supported by the suction boxes. This done the .cam bar 43 is lowered, thus permitting the rock-arm and presser bar to resume their down position, in which case the acting edge of the bar bears upon the heads of the pins 55.- Consequently the springs 56 being compressed act uniformly upon the movable gripper members to cause them to grip the paper; and at the same time the spring plate 58, exerting an additional clamping efi'ect upon the two central grippers, insures a positive and reliable ripping of the sheet at its central portion. 11 the succeeding forward stroke of the gripper frame the sheet, thus firmly held, is drawn over upon the platen, and as said frame approaches the limit of its forward stroke the dog 41 engages-and rides upon the floor of the casing, thus retracting the rod 40 and by its hooked forward end slightly'rocking the arm 32' in a manner to ralse the acting edge of the presser bar and thus relieve the pressure of the pins on the springs 56 of the entire series of grippers. Such upward movement of the presser bar, however, is not sufficient to cause it to contact with the lips 57 of the, movable gripper members, and hence the two middlegrippers are maintained under uniform pressure by the action of the spring plate 58 thereon. The pressure of the plate. is so adjusted that the paper is positively drawn by the middle grippers into contact with the steps 50, and then such grippers, together with the end grippers, as they complete their forward stroke, escape from the positioned sheet. 'ihereupon the gripper frame is tilted and retracted for a repetition of the above described operation on a succeeding sheet of paper; and so on.

- It is to be understood that I do not limit my invention to the exact details of conframe, of a gripper on said frame compr1s-' ing complementary fixed and movable gripping members, a plurality of springs for exerting pressure independently of each other upon the movable member, a vibrato presser bar loosely connected with said movable member, means for actuating said'bar to raise saidmovable member temporarily when the gripper frame approaches the end of its rearward stroke, and means for actuating said bar to relieve the movable grip per member from the pressure of one of said springs when the gripper frame approaches the end of its forward stroke, the otherv spring remaining in action upon said mov-v able member.

2. The combination, in a printing press having a platen, forward paper stops on said platen, and a reciprocating gripper frame, of end grippers and a pair of middle grip; pers on said. frame, each of said grippers com-prising complementary fixed and movable members, compression springs associated with the movable members of the respective grippers, auxiliary spring means associated with the middle grippers, a vibratory presser bar loosely connected with the movable members of the respective grippers, means for actuating said bar to raise said movable members temporarily when the gripper frame approaches the end of its rearward stroke, and means for actuating said bar to relieve the movable gripper members from the pressure of said compression springs when the gripper frame approaches the end of its forward stroke, the auxiliary spring means remaining in action upon said movable members. y

The combination, in a printing press having a platen, forward paper stops on said platen, and a reciprocating gripper frame, of paper grippers onsaid frame comprising complementary fixed and movable grippingmembers, compression springs as sociated with the movable members of the respective grippers, a vibratory presser bar loosely connected with said movable members, means for maintaining said bar in a normal position wherein it acts to compress the springs, means for actuating said bar to cause itto raise and then to lower the said movable members when the gripper frame is at the end of its rearward stroke, and means for actuating 'said bar to release the pressure from the springs when said frame approaches the end of its forward stroke.

having a platen, forward paper stops on said platen, and a reciprocating gripper frame, of a pair of paper grippers on said frame comprising complementary fixed and movable gripping members, a resilient plate connecting the said members, a verticallymovable support for said plate, a spring acting to maintain said support yieldingly depressed, a vibratory presser bar loosely connected with said movable members, and means for actuating said bar to cause it temporarily to raise said grippers against the action of said spring and plate.

5. The combination, in a printing press having a platen, forward paper stops on said platen, and a reciprocating gripper frame, of a pair of grippers on said frame comprising complementary fixed and movable gripping members, compression springs associated with the movable members of the respective grippers, a vibratory presser bar loosely connected with said movable members, means for maintaining said bar in a normal position wherein it acts to compress the springs and thus hold said movable members yieldingly depressed, an auxiliary depressing means comprising a resilient plate connecting the said movable members, a vertically movable support adjustably connected to the body of said plate, and a spring acting to maintain said support yieldingly depressed, means for actuating said presser bar to raise and then to lower the said movable gripper members when the gripper frame is at the end of its rearward stroke, and means for actuating said bar to release the pressure of the compression springs when the said gripper frame approaches the end of its forward stroke.

Signed at Barber-ton, in the county of Summit and State of Ohio'this 11th day of March, A. D. 1919.

EDWVARD R. LINEBAUGH.

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