US355022A - Josef leidl - Google Patents

Description

UNITED STATES PATENT OFFICE.

JOSEF LEIDL, OF NUREMBERG, GERMANY.

PROCESS'OF MAKING TRACING, REPRINTING, AND TRANSFER PAPER.

$PECIEICATION forming part of Letters Patent No. 355,022, dated December 28, 1886.

Application flled Augnsi 10, 1886. Serial No. 10,566. (No specimens.)

To all whom it may concern:

Be it known that I, J OSEF LEIDL, a resident of Nuremberg, Germany, have invented an Improved Process of Making Tracing, Re-

printing, and Transfer Paper, of which the following is a complete specification Lithographers transfer-paper as heretofore made is objectionable, because liable to be drawn out of shape. The object of my inven- IO tion is to render such paper absolutely inelastic, so that it cannot be drawn out ofshape, and to make it capable of being washed, atthe same time leaving it transparent, fine, and pliable. On this paper the finest drawings and sketches can beexecuted, to be transferred to lithographic stone, even if the drawing should be several days old. The drawing can also be partly or wholly washed off and renewed. No manipulation to which the paper 2o will be exposed will draw it out of shape. It

will always retain its original form. The paper is applicable to all uses to which such transparent paper can be put.

I produce the paper as follows: I first cover the surface of a lithographic stone, which has the size of the paper to be treated, with boiled linseedoil, which I apply with a roller. I

place the paper upon the stone so prepared and put upon its top a light sheet of zinc or other sheet and draw the stone carrying the paper and its covering through a lithographic press. This causes the linseedoil to thoroughly permeate the paper. The paper is now taken from the stone, turned around, and treated on its other face the same as described, after which it is taken off and hung up to dry.

WVhen nearly dry,which is after about twentyfour hours, the paper is once more subjected to the same treatment. The paper having been thus prepared and allowed to become about half dry, is next covered with a mixture composed of about two parts of siccative coachvarnish and one part of pure odorless turpentine. For this purpose the paper is placed It is then etched again.

with the aid ofa soft brush. It is then hung up to dry, which requires about twenty-four hours. The dry paper is then placed upon a sheet of zinc, and with a soft sponge washed with soap and water, then rinsed with clean water, again well dried, and on aclean lithographic stone drawn once more through the lithographic press. Finally,itisdraw'n through and finished in an ordinary glazing-machine. 5 The paper thus prepared can be readily washed and cannot be drawn out of shape, as has already been stated. When to be drawn upon, it is immediately before use placed between two sheets of, clean and smooth paper and slowly rubbed with a palette-knife or foldingbone.

'To use it as a transfer paper, it is manipu lated as follows: From the original,which may be an engraved orlithographed stone, is made a strong dry transfer on said paper, and the latter then in a dry condition is pressed on another stone. The lastmentioned stone, which must be clean and dry, is now rubbed with fibrous gypsum and lightly etched, and then the printing coloris rolled into it, so that the complete drawing becomes pereceivable. Finally, the drawing is washed from the stone,.the final-color for printing rubbed in, and the printing proceeded with.

I claim" p The process herein described of preparing tracing, reprinting, and transfer paper, which consists in first coating said paper with boiled 8c Witnesses:

ANDR. STICK, FRIEDR. Sonarz.