US1509112A - Process for the manufacture of inking surfaces - Google Patents

Description

Patented Sept. 23, 1924.

UNITE 'ZSTTE istair ETIENNE SARDOU, FERNAND BOULLE, SEGOND IYIO'RDACI, AND EMILIEN COMMENGE, OF MARSEILLE, FRANCE.

PROCESS FOR THE MANUFACTURE OF INKING SURFACES.

No Drawing.

To all whom it may. concern:

Be it known that we, ETIENNE SARDOU, FERNAND BOULLE, Sneonn MORDACI, and EMILIEN CoMMnNcE, citizens of the Republie of France, all residing at Marseille,

France, have invented certain new and useful Improvements in Processes for the Mannfacture of Inking Surfaces, of which the following is a specification.

This invention refers to the production process of engraved inking surfaces allowing to print in one or more colors and in a single operation any substance susceptible of being printed; and in which the inking surfaces may only ink each separately a certain portion of the printing plate of known rotative printing machines, only referred to as being susceptible of employing the inking surfaces.

The one feature of the process is the molding of the original matrice on a lead plate, upon which a thin layer of natron silicate is applied to enable the vulcanization of the rubber inking surfaces directly on the lead matrice; another feature being the adoption of a supporting paper band applied on the back of the rubber inking surface during vulcanization and serving afterwards as a fixing means on the plate inking cylinders of the rotative printing machine; a further feature being the exact inking of the engraved collecting type; a further feature being the possibility to produce an engraved brass type obtained by the direct transfer from the rubber inking surfaces and subsequent etching. I

A machine using the proposed rubber inking surfaces possesses as many inking rollers as colors to be printed all disposed concentrically round a printing cylinder of a larger diameter of a known system. On the cylinders. smaller in diameter the rubber inking surfaces (embossed) are fixed and each rubber surface corresponds to one color. The cylinder of larger diameter carries in embossed printing, the single engraved type which prints all colors in a single operation.

The whole of these operations constitutes the working in general of the printing machine, and these explanations are given merely as an example of application of the Application filed September 14,1922. Serial No. 588,174.

inking rubber surfaces in connection with rotative printing machines.

The first operation is to obtain a rubber inking surface for each color. To this effect 5. a stereotype or any equivalent is used; said type showing the text or subject to be printed as seen on the printed matter. This stereotype is pressed against a lead plate upon which a thin uniform layer of natron silicate is then applied to allow the vulcanization of the rubber inking surface directly on the lead mold.

As soon as the lead mold is ready a plastic rubber foil is vulcanized directly on the mold and under pressure, applying previously at the back of the rubber stratus to be vulcanized apaper band serving as a supporting and fixing means for the inking surface when finished. 70

When the vulcanization is completed the rubber inking surfaces are easily separated from the mold or matrice and adhere perfectly to its paper supporting and fixing band. The latter enables the placing and adjusting of the surface on the inking cylinders of the machine, using known means.

The inking surfaces receive their ink from the usual inking rollers, but these should, however, possess perfectly regular and polished surfaces not afiected by fat or adhesives composing the ink.

What we claim is:

The process of manufacturing a rubber inking surface which consists in pressing a sheet of lead against a stereotype or its equivalent containing the 'matter to be printed to form a mold, covering the mold with a thin uniform layer of natron silicate placing thereon a sheet of unvulcanized rub- 90 her witha paper band on the back of the same pressing the rubber into the mold and vulcanizing the same.

In testimony whereof we aflix our signatures in presence of two witnesses.

ETIENNE SARDOU. FERNAND BOULLE. SEGOND MORDACI.

' EMILIEN COMMENGE.

Witnesses:

CHARLES F. PENNINGTON, PIERRE Poona.