US769296A

US769296A - Endless printing-form.

Info

Publication number: US769296A
Application number: US13558902A
Authority: US
Inventors: Horace G Bender
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-12-17
Filing date: 1902-12-17
Publication date: 1904-09-06
Anticipated expiration: 1921-09-06

Description

N0. '769,296. Q PATENTED SEPT. 6, 1904.

H.' G. BENDER.

ENDLESS PRINTING FORM.

v APPLICATION FILED DEO.17, 1902.

N0 MODEL.

UNITED STATES Patented September 6, 1904.

PATENT OFFICE.

ENDLESS PRINTING-FORM.

SPECIFICATION forming part of Letters Patent No. 769,296, dated September 6, 1904.

Application filed December 1'7, 1902. Serial No. 135,589. (No model.)

To all whom it may concern:

Be it known that I, HORACE Gr. BENDER, a citizen of the United States, residing at East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Endless Printing- Forms; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention has reference to endless flexible printing-forms; and the invention consists in the construction and combination of parts, substantially as shown and described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a diagrammatic side elevation of a portion of a printing-machine with which my invention is adapted to be used and which shows the endless printing-form over the rollers thereon, as will hereinafter fully appear. Fig. 2 is a perspective plan View of a section of the endless form alone.

I have shown as much ,of a printing-machine as appears to be necessary and whichis designed mostly to disclose the manner of .using my invention rather than as an essential ticed with different kinds of machines, and

particularly a class of machines of my own invention; but the invention resides mainly in the endless printing-form F, which consists of the blanket or belt 2, of rubber, rubber-- covered canvas, or other base of suitable material and of the required thickness and elasticity to cushion the work, and upon this I place a sheet-covering 4, of zinc, aluminium, or equivalent material or substance, which is adapted to receive the design, figure, or characters from which the impressions are to be transferred to the cloth or paper provided to receive 'the same. The base or blanket 2 and the metallic sheet 4, which is adhered thereto, are arranged to terminate at the same place, and the ends of the blanket are left just far enough apart to permit the ends of the metallic sheet-covering to be firmly joined and to rest the joint between the ends of the blanket, or vice versa. In this instance the joint is made by hooking the ends of the said sheet together and then flattening them, substantially as shown,thus leaving a practically smooth and continuous surface above and below, and yet making the connection strong enough for all practical purposes. However, any equivalent or sufficient means for connecting the ends of the said sheet and form may be employed without departing from the spirit of the invention. By thus cushioning the said plate 4 I provide a continuous cushion for the printing and also obviate the necessity of cushioning the impression-cylinder B, against which the cloth or paper comes when being printed. Them-again, with a covering of this kind no ink can reach the rubber blanket beneath, and

-I avoid the consequent rapid deterioration of said blanket, which always occurs when the blanket is exposed, as formerly, and the material expense of frequent renewals.

. Now the design, whatever it may be, is drawn or produced by etchings, transfers, or otherwise upon the zinc or other sheet, and the printing is done therefrom in the usual way. Afterward when it is desired to change the design or figure upon the Zinc the sheet is ground off sufficiently to remove the design, when the plate is ready for another etching or design, and so on over and over again. It thus follows that I can use the same endless form or belt for a considerable period and until the zinc or metallic sheet has been practically worn out in use, when it is removed and a new one substituted. If necessary, I can repeat any particular, design at intervals around the entire length of the belt, and I can also feed paper or cloth thereto in ery, as in presses ordinarily.

Manifestly the details of construction as hereinbefore set forth may be varied and changed as conditions or circumstances demand and be Within the invention, the essential features of which are the endless form, with its slightly-cushioned base and metallic sheet-covering adapted to have the printingdesigns developed directly upon its surface and to be removed and substituted Without changing or cutting the form.

What I claim is 1-. An endless printing-form having a cushioning-blanket at its base and the ends of said blanket separated, and a sheet-metal covering adhered to said base and having its ends joined transversely in the space between the ends of the base, substantially as described.

2. An endless printing-form having a sheetmetal covering and the ends of said covering separated, and a cushioning-blanket as its base adhering to said metallic sheet and having its ends joined transversely in the space between the ends of the sheet-covering, substantially as described.

Witness my hand to the foregoing specification this 25th day of November, 1902.

HORACE G. BENDER.

Witnesses:

G. B. PITNEY, RUssELL M. EVERETT.