US1181885A - Printing-plate-shaving machine. - Google Patents

Description

A. A. HENZI.

PRINTING PLATE SHAVJNG MACHINE. APPLICATION FILED 'APR. 16. 1915.

Patented May 2,1916.

2 SHEETS-SHEET I.

THE COLUMBIA mm oummr: co. WASHINGTON, b. c.

A.A. HE NZI.

PRINTING PLATE SHAVING MACHINE.

Patented May 2,1916.

APPLICATION FILED APR. 16, 1915.

2 SIIE ET$SHEET 2.

THE COLUMBIA PLANOGRAPH C0,. WASHINGTON, D. c.

ionrrnn snares rarnnr orrien ALBERT A.

HENZI, OLE CHICAGO, ILLINOIS, ASSIGNOR TO II-IE GOSS PRINTING PRESS COMPANY, OF CHICAGO, ILLINGIS, A CORPORATIGN 0F ILLINGIS.

PRINTING-PLATE-SHAVING MACHINE.

Specification of Letters Patent.

Patented May 2, 191%..

Application filed April 16, 1915. Serial No. 21,723.

To all whom it may concern Be it known that I, ALBERT A. Hnnzr, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printing-Plate- Shaving Machines, of which the'following is a specification, reference being had to the accompanying drawings.

My invention relates to machines for shaving the inner faces of the ribs of curved printing plates, and it has for its object the provision of new and improved means for partially ejecting the plate at the conclusion of the shaving operation so as to enable a workman to grasp the plate'fo'r removing it from the machine. Automatically-acting means have been provided heretofore for partially ejecting a plate at the conclusion of the shaving operation, such means being adapted to hold the plate in its partially ejected position for a short time only. In the use of the mechanism of the old construction it isnecessary for the attendant workman to be in position to grasp the plate promptly at the conclusion of the shaving operation in order to prevent the plate from sliding back into the machine into position to provide a construction from which it can only with considerable diliiculty be removed.'

It is one of the objects of my invention in which the means by which the plate is partially ejected is held in operative plate-ejecting position by its engagement with the plate,'.the arrangement being such that'upon theremoval of the plate the plate-ejecting means is withdrawn to normal position ready for the next succeeding plate-shaving opera tion.

prove machines of this type in sundry de- It is another object of my invention to imsire to cover by this application is set forth in the claims. 1

In the drawings:Figure 1 is an end in position therein ready for the start of the shaving operation; Fig. 2 is a view from the same end of the machine but with the view of my improved machine with a plate driving mechanism and its connected parts removed therefrom, the plate-ejecting mech anism being shown in operative plate-ejecting position; Fig. 3 is a view from the opposite end of my machine, showing a printing plate ready to be withdrawn from the machine; Fig. 4 is a top view of my im- 'proved machine; and F ig. 5 is a vertical cross-section through a portion of my improved machine showing the manner of mountingthe latch-devices by whichthe plate-ejecting -means is held in operative plate-ejecting position while the plate is in contact therewith. I r

. Referring to the several figures of the drawings in which corresponding parts are indicated by the same reference characters,

' 10 indicates the framework of mymachine comprising an arcuate shell 11, in the construction shown the shell 11 being formed integral with the frame. ltevolubly mounted upon one end of the frame 10 is a drive-' shaft 12 having mounted thereon a worm 13 which meshes with a worm-gear 14: fixed upon a longitu(finally-extending shaft 15. A shaving blade 16 is mounted upon the shaft 15 in any suitable manner by means ofan armll. As will be readily understood, the blade 16, upon the rotation of the shaft 15 in clockwise direction in Figs.

1 and 2, is adapted to shave the inner faces longitudinally of the shaft is a clutch mem- 23 into engagement with a clutch' member '24 fixedly connected with the pulley 21.

The yoke lever 23 is fixedly mounted upon a rock-shaft 25 which is journaled along one side of the machine. A spring 26 attached to the lower end of an arm 27 (see Fig. 3) tends to hold the shaft 25 turned to the limit of its'movement in clockwise direction in Fig. 3, or in counterclockwise direction inFig. 1, holding the clutch member 22 out of engagement with the clutch member 24. A lever 28 is mounted upon the end of the shaft 25 extending across one end of the machine for rocking the shaft 25 for throwing the clutch members 22-24 into engagement for causing a rotation of the shaft 12 and a corresponding rotation of the shaft 15, as will be readily understood.

Automatically-acting means is provided for holding the lever 28 in its lowered position, comprising a bell crank lever 29, the

lower arm of which extends vertically past the lever 28 when the lever 28 is in its uppermost position. The lever 28 is provided with a lug 30 extending inward from its inner face adapted to limit the movement of its raised position. A: spring 31 serves to' the'bell crank lever 29 in counterclockwise direction in Fig. 3 while-the lever 28 is in hold the lever 29turned to the limit of its motion in counterclockwise direction in Fig.

3. A lug 32 mounted on the outer face of the vertically-extending arm -of the bell crank lever 29 serves to limit the upward movement of the lever 28. Aswill be readily understood, when the lever 28 is moved 1 downward so as to free the lug 30 from the side face of the vertically-extending" arm of thebellcrank lever, the bell crank lever is turned'in counterclockwise direction in said Fig. 3 bringing the lower end of the verticallyextending arm into vertical alinement with the lug 30 so as to prevent the upward movement of the lever 28, serving in that way to hold the clutch members 2224. in engagement. A pin adapted to be engaged by the horizontally-extendingarm of the bell-crank lever 29 serves to limit the rotation of the bell crank lever in counterclockwise direction in Fig. 3 so as to prevent the vertically-extending arm of the bell v crank lever moving to the right in Fig. 3

beyond the lug 30. An arm 34 mounted upon one end of the shaft 15, is adapted to be brought into. engagement with the horizontally-extending arm of the bell crank lever shortly before the end of one complete revolution of the; shaft 15 in counterclockwise direction from the position shown in Fig.3, the arm 34 upon the continued rotation of the shaft'15 serving to turn the bell crank lever 29 in clockwise direction in said Fig. 3 for permitting the lever 28 to rise under the influence of the spring 26 for throwing the clutch members 2224 out of operative engagement for stopping the rotation of the shaft 15.

The means for automatically-ejecting the plate 19 partially from its position in the shell 11 at the end of the rotation of the shaft 15 comprises a longitudinally-extending bar 35 against the edge of which the plate 19 is adapted to bear during the shaving operation, the bar 35 being positioned during the shaving operation under a downwardly-extending flange forming a part of the plate 20. Means is provided, actuated by the rotation of the shaft 15, shortly after the end of the operative shaving movement of the plate 16 for moving the bar 35 downward along the inner face of the shell 11, for moving the plate 19 out of its normal position, as shown in Fig. 1, into its partially ejected position, as shown in Fig. 2, the bar 35 being adapted to be moved, in such actuation, past suitable latch-devices 36, which latch-devices in cooperation with the plate serve to hold the bar 35 in its low ered position after the bar-lowering means has finished its operation and passed forward out of engagement.

The means for lowering the bar 35 for partially ejecting the plate 19 comprises links 3738 pivotally connected to the ends of the ejector-bar 35, such pivotal connection being accomplished in the construction shown by means of trunnions 39 formed on the ends of the bar mounted in suitable openings in the links. The lower end of the link 38 is pivotally connected by means of a pin 40 with the end of another link 41 which is fixed upon the end of a longitudinally-extending shaft 42 which is revolubly mounted upon the frame 10. A spring 43 is mounted upon the pin 40 and having suitable bearings upon the links 3841 tending to hold the said links against buckling relative to each other. The lower end of the link 37 is pivotally connected by means of apin 44 with one end of a link 45 which is fixed upon the opposite end of the shaft v 42. A spring 46 is mounted upon the pin 44 tending to hold the links 37 and 45 against buckling relative to each other. As is clearly shown in Figs. 1 and 2, in the construction shown the link 45 forms one arm of a bell crank lever, the other arm 47 of such bell crank lever being adapted to extend upwardly from the pivotal mounting of the lever upon the frame 10. An arm 48 mounted upon the shaft 15 is adapted to be brought into engagement with the arm 47 of the bell crank lever shortly before the end of the rotation of the shaft 15 in clockwise direction in Fig. 2, serving to swing the arm 47 to the left in said figure and causing a rotation of the shaft 42 in counterclockwise direction therein against the action of a spring 49 connecting the arm 47 with the frame work. This rocking of the shaft 42 serves to move the links 41 and 45 downward, causing a corresponding downward movement of the links 37 and 38 carryingwith them the ejector-bar 35. The springs 4346 serve to hold the links 37-38 at as great an angle with the links 4541 as is possible, whereby the bar 35 in its downward move ment is'caused to follow the face of the shell 11 and is prevented from moving inward away from the face of the shell. Upon the downwardmovement of the bar 35 the plate 19 will be partially ejected from the shell 11 into the position shown in Figs. 2 and 3, as will be readily understood.

Shortly before the arm 48 passes out of contact with the arm 47 the bar 35 is carried past the latches 36 before referred to, the

. continued rotation of the arm 48 serving to permit the bar to start upon its return movement under the influence of the springs 43, 46 and 49 until the upper edge of the ejectordoar is brought into effective engagement with the latches. As is best shown in Fig. 5, each of the latch-members 36 is slidably mounted in a suitable slideway 50, such slideway, in the construction shown, being formed integrally with the framework. Springs 51 are mounted in the slideways beneath the latch-members 36 tending to hold such latch members yieldingly in their uppermost position. As will be readily understood from aninspection of Fig. 5, the latch members 36 are adapted to be readily displaced downward against the action of the springs 51 by the bar 35 riding down the face of the shell 11, the springs 51 being weak enough as compared with the springs 43-46 to insure the downward displacement of the latch-members 36 rather than an inward movement of the bar 35.

As will be readily understood from an inspection of Fig. 2, by reason of the end of the arm 48 being rounded and'by reason of the end of the arm 47 being beveled, upon the rotation of the arm 48 out of contact with the arm 47, the arm 47 is let back slowly and evenly so as to bring the bar 35 slowly and evenly into operative engagement with the latch members 36, the plate 19 being adapted by its own weight to slip back with the bar 35. .With the bar 35 in engagement with the latch members 36, and with the printing plate 19 bearing against the bar 35, such bar is held against rotation and against upward movement. When, how ever, the edge of the printing plate 19 is moved very slightly to the left in Fig. 3 away from the latches 36, the lower edge of the bar 35 is rendered free to move upward and inward toward the shaft 15 under the influence of the springs 43, 46 and 49, the bar 35 turning in this movement upon the trunnions 37 relative to the links 3738. The bar 35 is thus freed from engagement with the latches 36 and brought back to its normal position wider the plate 20.. It is thus seen that the plate-ejecting mechanism is adapted :to hold the plate in partially ejected position after the shaving operation for an indefinite period until the. printing plate is given a slight movement for removing it from the machine or is otherwise disturbed from the position shown in Fig. 3. Upon theremoval of the printing plate 19 and the return of the bar 35 to normal position under the plate 20, the machine is in condition for the reception of another printing plate to be shaved.

What I claim as my invention and desire to secure by Letters Patent, is-

1. In a plate-shaving machine, the combination of a shell adapted to receive a printing plate, a shaving device revolubly mounted relative to said shell, means for rotating said shaving device, an ejector bar rotatably mounted relative to said shell and adapted to be moved circumferentially of the shell for partially ejecting the printing plate, means for moving said bar into plateejecting position means adapted to engage said ejector bar and to hold it against rotation in plate-ejecting position so long as the printing plate is inoperative engagement with the bar, and means adapted to rotate said ejector bar for releasing it from said holding means and'to retract said bar from plate-ejecting position when said printing plate is moved out of engagement with the bar. 7

2. In a plate-shaving machine, the combination of a shell adapted to receive a printing plate, a shaving device revolubly mounted relative to said shell, means for rotating said shaving device, an ejector bar rotatably mounted relative to said shell and adapted to be moved circumferentially of the shell plate,

for partially ejecting the printing means for moving said bar into plate-e ecting position,

spring-seated latch means adapted to engage said ejector bar and to hold it against rotation in plate ejecting position so long as the printing plate is in operative engagement with the bar, and yield ing means tending to move said bar out of plate-ejecting position adapted to rotate said ejector bar for releasing it from said latch means when. said printing plate is moved out of engagement with the bar.

3. In a plate-shaving machine, the combination of a shell adapted to receive a printing plate, a shaving device revolubly mounted relative to said shell, means for rotating said shaving device, an ejector-bar adapted to extend normally along one edge of the yielding means tending to hold said links against buckling relative to each other, means actuated by the operation of the machlne for swlnglng said last-named links 1n unison for drawing said first-named links tion with said printing plate to hold said bar in its plate ejecting position after the completion of the rotation of the shaving device.

ALB. A. HENZI.

-fiopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. C.

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