US377706A - John beodeick - Google Patents

Description

Nrrso STATES PATENT .grrics.

OHN BRODRIOK, on NEW YORK, N. x.

PREPARED SHEET Foa STENCILS.

SPECIFICATION forming part of Letters Patent No. 377,706,.d ate d February 7, 1888.

I Application filed May 20, 1886. Serial No. 202,795. lSpecimens.)

To all whom it may concern:

Be it known that I, JOHN BRODRIOK, of the city, county, and State of New York, have invented certain new and useful Improvements in Prepared Sheets for Stencils or Transmitting Printing-Sheets, of which the following is a specification, being such a full and clear description of my present invention as will enable others skilled in the art to which it appertains, or with which it is most nearly connected, to employ and practice the same in its preferred form.

The points of novelty will be designated in the claims concluding this specification.-

In the practice of my invention I employ a thin porous sheet of material impregnated or coated with a gummy or waxy substance, or

. other material impervious to ink, said sheet .being of such porosity and said gummy or waxy substance or other filling of such consistency that when the impregnated or coated sheet is placed upon asuitable support or bearing-surface and impressed upon with a writing or printing instrument, of whatever character, the gummy or waxy substance or other .material will, under the pressure thereof, be

displaced at the points or lines of impression, so as in all cases to leave them open to the passage of ink through the pores of the sheet. Such a sheet dispenses with the necessity of employing in the preparation of stencil-sheets an abrading or puncturing instrument, bearing-surface, or plate.

It will be seen, accordingly, that my invention, considered broadly, consists of a novel stencil, or rather a transmitting printingsheet of a thin material coated or filled with a substance impervious to ink, which sheet is so porous that in the removal of the filling or coating at any point the sheet becomes open to the transmission of ink thereat,so that by removing the filling or coating in the form or shape of any letter, figure, design, 850., the sheet becomes open tothe transmission of ink in the form of such letter, figure, design, 850., thereby constituting a transmitting printing-sheet. It will be observed that this sheetdiffers from a stencil in that the letters, figures, 8m, are not cut out. 0 cannot be completely formed, for if the 0 were cut all the way around the center would drop out.

In a stencil, for example, the letter ln'an application filed on even date here with, under Serial N o. 202, 7 94, I have described and specifically claimed another process of making a stencil-plate from the waxed sheet herein described by the use of a heated implement. I therefore do not claim the same here.

I prepare my improved sheet, by preference,

from a sheet of thin highly-porous paper by 6c 3 immersing the same in a bath of melted gummy or'waxy substance-such as paraffine-of about 120 Fahrenheit fusion-point, or by any other suitable method of waxing paper now known In paper so prepared the stylus 6 5 The stencil thus prepared is then used v The described stencil-plate for the production and multi plicationof impressions of printing is made byimpressing the type-letters or other desired characters, designs, pictures,

maps, or illustrations upon the pre'pared' 8o sheet with type (as by a type-writing ma chine)i:or plates on which the letters, characters, designs, maps, pictures, illustrations, or engravings are made of raised lines and surfaces, such as on being so impressed'will ex-,8 5

press from the prepared sheet the said gummy or waxy substance, leaving the fibers thereof exposed and open to the transmission of ink. When the filling is not adhesive, as wax to some extent is, the article is still substantially o 7 the same. Stencil-plates thus prepared may then be used in duplicating impressions, as aforesaid, or otherwise. This use of the prepared sheet further demonstrates the distinction between it and former prepared sheets, 5

inasmuch as the impression of the type or other character on former prepared sheets would not produce a stencil unless some per-- forating or abrading type or perforating or abrading bearing-surface were used. When waxed paper isv employed, as above described, and is placed upon a backing of ordinary ma terialsuch, for instance, as wood or ordinary paper-the wax expressed from the paper by pressure will adhere to the said backing and be partially transferred thereto.

If there be some abrasion of the sheet in the mere act of writing thereon, it has no necessary reference to the process, for in the process of imprinting type, as aforesaid, there is no abrasion or perforation of the texture whatever. I use now one of the most porous and thinnest grades of paper made of the Japanese paper-tree, or Moms papyrifem satz'va, commonly known as yoshino in Japan, or as dental paper here, having, by preference, a weightof about seventeen ounces to the ream of sheets, fifteen inches by ten and one-half. As far as I am aware, this is the only kind of paper or other material now in the market or known to the public which is of sufiicient porosity, thinness, and toughness to fulfill all the necessary conditions of the above described stencil-sheet, and this paper has never before been waxed or gummed or used for stencils; but it will of course be understood that any other sheet of material of the requisite porosity, thinness, and toughness will be the equivalent, and may be employed in place of the above-described sheet.

By the word stencil as applied to my invention I mean to designate herein a sheet from which the filling has been removed to prepare for duplicating the words or designs made on it, substantially as above described.

By puncturing-instrument I mean an instrumentpuncturing holes through the texture of the sheet by piercing it like a needle.

I am aware that stencils have heretofore been made by piercing a sheet of paper with numerous small holes, through which ink is then transmitted;' also by abrading a sheet of waxed or varnished paper, and thereby disturbing, tearing, and lacerating the fibers or substance of the paper to such an extent that ink will be readily transmitted therethrough at the lacerated or disturbed portions, the paper being itself ,of such a character that ink will not be readily transmitted when the sheet is in its normal condition, and also that sheets of paper close in texture and highly sizedsuch as bank-posthave been coated with a suitable varnish and subsequently subjected to the action of chemicals, which open it to the transmission of ink at the points or lines of printing. My claims are therefore limited so as not to include either of these stencilsheets. It will be seen without further explanation that these sheets and stencils are all radically diflerent from that herein described and claimed. Neither do I herein claim the method or process involved in the making of my said stencil or transmitting printing-sheets, as the same is made thesubject-matter of an application filed by me December 2, 1887, hearing Serial No. 256,837.

The ordinary printers ink-roller may be employed, and if the first passage of the roller does not bring the ink through at all points of the lines or characters described, a few more passages in the ordinary manner will do so.

I claim and desire to secure by Letters Patcut-- 1. A transmitting printing sheet consisting of a thin porous sheet through which ink is readily transmitted, such as Japanese dental paper or yoshino, filled or coated with a substance impervious to ink, as parafiine, substantially as described.

2. A transmitting printing-sheet consisting ofa thin porous sheet through which ink is readily transmitted, such as Japanese dental paper or yoshino, filled or coated with a substance impervious to ink, as parafiinc, and

having this filling or coating removed at the.

points or lines of printing, substantially as described, for the purpose specified.

3. A prepared sheet for stencils, consisting of a sheet of Japanese dental paper or yoshino, coated with a substance impervious to ink, substantially as described.

In testimony whereof I have signed my name to this specification in the presence oftwo subscribing witnesses.

JOHN BRODRICK.

XVitnesses:

GEORGE N. SANDERS, LoUIs A. WAGNER.