US1542315A

US1542315A - Printing-plate clamping device

Info

Publication number: US1542315A
Application number: US4743A
Authority: US
Inventors: Elmer F Noell
Original assignee: PRINTING MACHINERY CO
Current assignee: PRINTING MACHINERY CO
Priority date: 1925-01-26
Filing date: 1925-01-26
Publication date: 1925-06-16
Anticipated expiration: 1942-06-16

Description

June 16, 1925.

. 1,542,315 E. F. NOELL PRINTING PLATE CLAMPING DEVICE Filed Jan. 26, 1925 v AVVE/VTO/R 5r 1 j Z Patented June 16, 1925.

UNITED STATES PATENT OFFICE- ELMER F. NOELL, 0F CINCINNATI, OHIO, ASSIGNOR TO THE PRINTING MACHINERY COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO. T

PRINTING-PLATE CLAMIING DEVICE.

Application filed January 26, 1925. Serial No. 4,743.

To-aZZ whom it may concern:

Be it known thatI, EIMER F. NoELL, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Printing-Plate Clamping Devices, of which the following is a full, clear, and exact de scription, reference being had to the accompanying drawing, forming part of this specification.

. My invention relates to devices for retaining printing plates in place, by means of clamping jaws, adjustable in their mounting to impinge against the plate and hold it in place. I

My invention is particularly designed for use in the familiar style of printing plate mounting element having a series of closely related round holes, with expanded bases.

In the production of drop-in-hooks which is the term applied in the art to printing plate clamping and holding pieces of the type here in question, the problem has been to produce a device which has few parts, simply made, and simply operated. The devices are quite small, bein on a smaller scale than the drawings 1n this specification, which are at least twice the size of the actual devices, and the manufacture and assembly, as well as the manipulation of these small devices require close work, which is expensive unless the structure is simple in the extreme.

In my structure I provide a device which has an integral jaw at one end, and a pivoted piece actuated by a screw, which rocks against the wall of the hole or groove, and thus at one act thrusts the jaw against the plate, and tilts a lower end on the pivoted piece under the shoulder of the expanded base of the hole. I thus take advantage of the tilting of the jaw mounting body, but the shoulder engaging member is not on the jaw mounting piece.

There are three pieces and a pivot pin, in my device, whic is obviously a simple structure to make, and a stout one in use.

I accomplish my objects by that certain construction and arrangement of parts to be hereinafter more spe'cifically pointed out and claimed. i l

I have merely indicated a base block 1,

in which are round holes 2, having expanded bases to form shoulder 3. The printing plate merely indicated at, 4 is set on top of the base block and is to be clamped in place by a series of the jaw members being brought into engagement with it, on all sides. t I

The pin- 5 is provided of a size suitable to easily slip into the holes 2, which pin has secured integrally or otherwise, but preferably permanently thereto, a cross head 6 serving as a jaw to engage the side of a printing plate.

The lower end of the body of the pin is bifurcated and pivoted at 8 near its lower end is an L-shaped piece havingthe arm 9 and the projection 10.

The arm 9 is provided with a round bottomed groove 11, which is formed in the slanting top face 12 of the arm.

The interior of the pin is provided with a threaded hole, opening out through" the top ofthe jaw and pin as indicated at 13. In the lower portion of this hole is placed a screw 14, which has a square socket in its upper end at 15 tobe engaged by a tool. The tool is shown as having a head 16 and a square shank 17 to engage the screw when thrust through the hole at 13.

The device as so constructed, isadjusted with the screw upwardly in its hole, so that the L-shaped piece can be swung to a position with its-arm embraced in the bifurcated legs of the pin. The projection of the L-shaped member will then pass down through the hole, and when the jaw has come into contact with the top of the plate, the lowerend of the pin and the projection 10 will lie below the shoulder in the base of the hole. 1

the wall of the hole in which the device placed, and will simultaneously move the jaw tightly against the plate, and tilt the whole body of the pin soihat: the'projection 10 is swung under the shoulder at the base of the hole. The rockingijof the L-sha'ped piece, alsoulif-ts up on the projection and clalmps it firmly under the shoulder of the ho e; i

The pin body. will tilt so asto move the jaw across the hole as far as the top of the pin will go, but if the plate crosses the hole intermediate its openin'gg-the clamping action against the under shoulder will take place in the same manner, as if the pin were moved to abutment with the wall at the upper mouth of the hole. v

I do not wish to beflimited to the exact f0l 11110f parts or mode of operating them, but wish to stat'e'the' invention inherent in the structure described in the claims'that follow. I

Having thus described my invention, what I claimas new desire'to secure by Letters Patent, is I 1 A prii'iting plate clampdevi'ce, adapted for use inaperturesin a'base'block' havf ing shoulders formed in the bottom of the apertures comprising a body" having a j aw thereon, a member pivoted on the body, so as to swing into substantial ligmnene therewitlitliereb'y permitting insertionof the entire device in the aperture, said member having a projection at the lower end thereof for engagement with the shoulder in the base of the aperture, and means movable through the body and engaging the the pive oted member to rock the same into position of engagement with the wall of the hole, thereby moving the projection into position beneath said sl'i'oulder by't he'tilting" of the body.

H 2. A printing plate clamp device adapted for use in apertures in a base block having shoulders formed in the bottom of the apertures comprising a body having a jaw thereon, a member pivotedon the body and haw ing an El-shape, formed so that the upward portion of the E can swing into substantial alignment with the body thereby permitting insertion of the entire device in the aperture, and the angle portion of the L formed to swing beneath the shoulder, when the member is rocked to force the jaw against a plate, and means in the body for engaging: thesaid member. 7

3. A printing plate clamp device adapted for use inapertures ina base'block having shoulders formed-in the bottom of the apertures comprisinga body having a jaw thereoh,--a member pivoted on the body and having an L-shape, formed so that the upward po'rtionof the'L can swing into substantial alignment with the body thereby permitting vinsertion of the entire device in the aperture," and the angle portion of the L formed to swing beneath the shoulder, when the member is rocked to force the jaw against a plate, and means in the body for engaging the saidmember, said means com prising a" ser'ew, and a slanting portion at the engagement oftlle screw with the member res'ultirig in"wedging it outwardly into engagement withthe wall of the aperture. ELMER F. NOELL.