US1194899A

US1194899A - Albert e

Info

Publication number: US1194899A
Authority: US
Publication date: 1916-08-15
Anticipated expiration: 1933-08-15

Description

.AJ'1II3 TE3]EL'.L E. STRIPPEL, OF NEW YORK, N. Y.

METHOD OF PRODUCING A STENCILING FABRIC.

No Drawing.

long fiber fabric, such as Japanese paper,

and it is treated with solutions including gelatin, glycerin, bichromate of potash and calcium chlorid in substantially the relative proportions herein specified.

In carrying out the method, I soak 14 oz. of chemically pure gelatin in 5 pints of water for about one hour. This solution is then heated on a water bath to about 190 F. until the gelatin is thoroughly dissolved. The solution is then strained off into a. heated vat, and 15 oz. of chemically pure glycerin is added to the solution and the whole maintained at a heat of about 190 F. in said vat. In a separate vessel, I dissolve 2% oz. of bichromate of potash in 5 pints of water and heat the solution to about 190 F. and then pour the same into the vat containing the solution of gelatin and glycerin. The solution is then thoroughly agitated and kept at about 190 F. and away from the influence of light.

Two sheets of grade A, Japanese paper are pasted on to a holder, as for instance, with shellac, and are treated to the solution in the vat by thoroughly saturating the paper therewith. The two sheets are thus combined to form a sheet of double thickness. The so saturated sheet is then dried in the sunlight or a good are light. After the sheet is dried, it is cutfromthe holder and run through a bath of warm Water for the purpose of washing off the excess of bichromate and chromic oxid produced. The sheet is then run through a fifteen per cent.

Specification of Letters Patent.

Patented Aug. 15, 1916.

Application filed November 22, 1912. Serial No. 732,992.

solution'of calcium chlorid for the purpose of rendering the sheet hydrous. The sheet is then partially dried, and while still damp is subjected to heat and pressure, as for instance, by passing the sheet through heated calender rolls exerting the desired pressure upon the sheet. The sheet is then cut into the proper sizes for use and attached to the proper frames as is usual. The fabric thus formed is very strong and will not readily break or tear and will keep moist and soft.

While I have described the use of J apanese paper, other fibrous materials might be.

utilized,such, for instance, as linen, cheesecloth, silk, etc.

What I claim is: I

1. The method of producing a fabric for stenciling and similar uses, consisting in first subjecting the fabric to treatment in a heated solution including gelatin, glycerin and bichromate of potash in substantially the relative proportions specified in which the glycerin by weight exceeds the gelatin, then to a treatment in warm water, and then to a treatment in a substantially fifteen per cent. solution ofcalcium chlorid.

2. The method of producing a fabric for stenciling and similar uses, consisting in first subjecting the fabric to treatment in a heated solution including gelatin, glycerin and bichromate of potash in substantially the relative proportions specified in which the glycerin by weight exceeds the gelatin, and away from the influence of light, then drying the fabric in the light, then submit ting the fabric. to a treatment in warm water, then submitting the fabric to treatment in a substantially fifteen per cent. solution of calcium chlorid, and finally subjecting the. fabric to heat and pressure'for drying and finishing the same.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this twenty first day of November 1912.

ALBERT E. STRIPPEL.

Witnesses:

F. GEORGE BARRY 'HENRY C. THIEME.