US789153A - Method of forming stencils for decorating glassware, &c. - Google Patents

Description

No. 789,153. PATENTED MAY 9, 1905.

' F. 0. HORN O G. w. BLAIR. METHOD OF FORMING STENGILS FOR DECORATING GLASSWARE, aw.

APPLICATION FILED AUG. 24, 1904.

WITNESSES TTED STATES Patented May 9, 1905.

PATENT Trice.

FRANK O. HORN, OF J EANNETTE, AND GEORGE W. BLAIR, OF PITTSBURG, PENNSYLVANIA, ASSIGNORS TO PITTSBURG LAMP, BRASS AND GLASS COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

METHOD OF FORMING STENCILS FOR DECORATING GLASSWARE, 80o.

SPECIFICATION forming part of Letters Patent N0. 789,153, dated May 9, 1905.

Application filed August 24:, 1904:. Serial No. 222,031.

To all whom/ it may concern.-

Be it known that we,FRANK O. HORN, of Jeannette, Westmorcland county, and GEORGE WV. BLAIR, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Method of Forming Stencils for Decorating Glassware, &c., of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of the paper shield after it has been molded and while the pattern is being burned on it. The dotted lines show how it is cut into sections preparatory to removing it. Fig. 2 is a horizontal section of part of the circumference of Fig. 1. Fig. 3 is a detail view of one of the sections on a smaller scale.

Our invention supplies means by which articles of glass, china, porcelain, &c.-such as lamp shades, globes, chimneys, &c.-can be decorated with great accuracy and uniformity and without the use of skilled labor. The cost of such decorating as heretoforeconducted has been due principally to the skill of the operators required for the work; but with our method any operator having skill enough to apply the color can produce good and satisfactory results of greater excellence than has been accomplished heretofore, because the outlines are perfectly well defined and there are no such brush-marks as those which ordinarily disfigure more or less such ornamentation.

In practicing our invention we take the glass globe 2 or other article to be ornamented and mold around it a shield of paper 3, applied, preferably, by putting on successive layers 4 of paper with adhesive paste, and when the coating has hardened the outline of the pattern desired to be applied to the glass is traced upon the paper and is burned out, preferably by means of a gasolene pyrographic burner 5. In this Way the work of making the pattern in the paper shield is performed very quickly and with great accuracy. To prevent the shield from adhering to the article while it is being molded thereon, we prefer to first coat the article with a coating of beeswax 6 or like material which can be softened by heat and mold the paper upon the beeswax-coated surface. Just before the shield is removed the beeswax is softened by heating the article, whereupon the shield after being cut into a suitable number of sections 7 can be removed. We then have a sectional stencilshield which is of the exact size and shape of the article and can be fitted to it without exposing any crevices. This is a matter of highest importance, because if the shield did not fit accurately true outlines could not be produced and the ornamentation could not be successfully done.

Having formed the stencil-shield of the shape and size of the article, the sections are applied to the article to be ornamented, and the decorator by means of an air-brush blows jets of coloring-matter upon the portions of the surface of the article exposed by the cutaway portions. A little practice will enable the operator by applying greater amounts of coloring-matter at one part of the pattern than at the others to produce very delicately-shaded effects, and different colors can be applied to different portions of the pattern. After one pattern has thus been applied anothersimilar stencil accurately fitting the article and having a different pattern may be applied to it and another set of colors and patterns may be made on the surface of the article.

Plastic material other than paper may be employed in forming the stencil, and the process may be otherwise modified, since What We claim is 1. The method herein described of forming stencils for ornamenting articles of curved or irregular form which consists in molding on such article an accurately-fitting shield, forming a stencil-pattern thereon, and then separating it from the article; substantiall y as described.

2. The method herein described of forming stencils for ornamenting articles of curved or irregular form which consists in molding a plastic shield of the size and shape of the article and burning a stencil-pattern thereon; substantially as described.

3. The method herein described of forming stencils for ornamenting articles of irregular outline, which consists in molding a plastic shield of the contour of the article over a surface coated With a material adapted to be softened by heat, then forming the stencilpattern thereon, softening the coating and removing the shield; substantially as described.

In testimony whereof We have hereunto set our hands.

' FRANK O. HORN.

GEORGE W. BLAIR. Witnesses:

GEO. B. BLEMING, JOHN MILLER.

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