US891499A - Matrix and method of forming same. - Google Patents

Description

No. 891,499. PATENTED JUNE 23, 1908.

y L. E. MORNIVNGSTAR.

MATRIX AND METHOD'OP FORMING SAME.

APPLIOATIQN FILED OUT. 15, 1906. v

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LESLlE MORNINGSTAR, OF WHEELING, WEST VIRGINIA, ASSIGN'OR OF ONE-HALF TO ROBERT H. BULLARD, EDGAR R. BIJLLARD, AND REUBEN J. BULLARD, .l'R., OFWHE ELING,

WEST VIRGINIA.

MATRIX AND WTHOD OF FQRMING SAME.

fipeoification of Letters Patent.

' Patented June 23, 1908. I

Application filed Octoberlb, 1806. Serial No. 389,059.

To all whom it may concern.

Be it known that I, LEsLIE E. MORNING- STAR, a citizen of the United States, residing at Wheeling, in the county of Ohio and State of West Vir 'nia, have invented certain new and other work requiring despatch in t e relief portions which may be readily de ressed.

production of sketches and the like, and anotherobject being the reduction of the out with stippled or screenike surfaceeither'for background printing or to give a half-tone effect to the reproduction.

The invention, therefore consists in forming a'matrix, sheet preferably of cardboard or other sheet of substantiall like surface and compressible texture, and minutely in dcnting or corrugating the surface thereof by. compression, so as to leave a comparatively soft surface formed of the uncompacted're-I and compacted without spreading, t us not only admitting of the drawing of a picture in depressions, on the" sheet direct, or from a pencil sketch or tracing made on the surface,

- or from a type, or cut by impressin the same thereon, out securing the, stipple effect in its reprodigction. I

In the accom anying drawing illustrating the invention: igure 1 represents the matrix sheet prepared in accordance with the invention and impressed with a picture, and, Fig.- 2 is an enlarged transverse section taken through a portion of the impressed shee'ton tho line :rw.

Referring more particularly to the drawing, 1 indicates the matrix sheet which isformcd preferably of thick-paper, the object being to provide a stiff and tenacious sheet. of material susceptible of ready surface-oompres'sion to form a matrix thereof, and at the same time adapted to compact within the area compressed without materially spreadin For the purpose of eliminatin any liability toward the spreading of the s set and to provide the'typc or cut formed from the without a ectin matrixwith a stippled or screen-like surface,

the matrix sheet is initiall provided with a stippled or corrugated sur ace 2 by means of a steel plate or die having on its face minute projections of'uniform extension, preferably. of conical cross section, and about one sixt fourth of an inch apart, and which by minute y indenting the sheet fQrm an uncompacted soft relief surface made up ofthe minutely raised portions 3, as shown more clearly in the enlarged section, Fig. 2, while the conical pits formed by the 'proiection of the plate. will have a compacted ottorn surface and terminate at a uniform depth in'p'oints or lines. In forming this surface the die is applied to the sheet while the sheet is in the dry state so that the result of thedie compression will be as stated above, the soft surface ofthe sheet thereby yielding uniformly to com-. pression b a stylus or other nstrument the base of the stip leformi its; pen the matrix sheet t us forme t e artist is provided with a surface upon which a picture can be drawn in the first instance w th pencil or crayon, and then with'a stylus the lines in the drawing can be pressed to the depth of the recesses or indentations made by the steel plate, the soft projecting portion 3 readily compactin under the; pressure without filing in or c anging the indentations adjacent the lines (if depression so that'the type or out formed upon the matrix sheet will print a uniform stippled or lined surface and reduce the well known face of the matrix sheet are so email and close together that the artist can draw a design as freely thereonas entire surface of any ordinaryrough paper and thus can me e the,

and then press the first outline of his'drawing d h d n ept 'an it wi lines down to the desire be obvious that impressions can be also taken on this matrix sheet from type-forms, and that a' portrait, picture or drawing ma be reproduced on the matrix sheet by any 0 the Well known methods of tracing, as by means of a carbon'sheet, the lines of the tracing being depressed in the mannpr set forth.*-

The matrix sheet above described is placed in a stereotype box-and metal poured in upon it in the same manner as in casting from an ordinary matrix, the same kind of metal and the same degree of heat being employed as now generally practiced in this art. the metal has cooled sufficiently the casting box is opened and the matrix sheet can then be freely removed and be ready for further use.

Matrix sheets having minute indentations for the purpose of producing a stri pled or screen effect are not new, as a relie surface has been formed on a matrix sheet by the use of material which under compression will disintegrate and be cut out of the sheet or else spread and compacted within indentations in t e sheet, but it will be seen that the present invention employs a material which does not disintegrate but is of a fibrous texture and compacts Within the same area occupied in its soft or uncompacted condition and by formed by compacting the material of the reason of this initial compaction to form the stipple pits a uniform and clear cut stip led relief is made possible in the rinting late formed from such a matrix, w ile the ra ing in depression thereon is greatly facilitate by the initial depression of so much of the surface of the sheet and the hardening of the extend.

What-I claim as new and desire to secure by Letters Patent, is:

1. A matrix sheet formed of compressible material of non-disintegrating nature, and

sheet'at the depth to which the depressions having its molding surface stipplei l or liried in depression to a uniform dept 1, as and for the purpose set forth.

2. A matrix sheet formed of compressible material, of non-disintegrating nature having material, having portions'of'its mol ing sur-- face compacted to rovide minute recesses of uniform depthto orm dots or lines in the printing plate to be molded therefrom, the relief portions of said molding surface being of uncompacted material, as and for the pur pose set orth.

4. The method herein described for forming a matrix sheet, which consists in first producing upon a sheet a field of stipples or ines in depression, said depressions being sheet whereby it will leave an uncompacted reliefsurface between the de ressions, and then forming the design desire in depression uponithe relief surface so formed, as andfor the purpose set forth.

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

L. E. MORNINGSTAR. Witnesses:

R. J. MCCULLAGH, JOHN S. OBERHOLTZER.

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