US1719719A - Etched article and process of producing same - Google Patents

Description

y M. w. NOERENBERG 1.719.719

ETCHED ARTICLE AND PROCESS OF PRODUCING SAME Filed July 25, 1928 r 2 Sheets-Sheet l fiwemfof M/NA WA/Of/PE/VBERG July 2, 1929. M. w. NOERENBERG ETCHED ARTICLE AND PROCESS OF PRODUCING SAME Filed July 25, 1928 @Sheets-Sheat 2 lLlHIIIIl ITITIl IJ 'fm/zmfor H6 M/NA W/VOEEENBERG F MM-FWW Arraggs'rr Patented July 2, 1929 1mm w. NOERENBERG, or MI'NITEAPOLIS, MINNESOTA.

ETCHED ARTICLE AND PROCESS OF PRODUCING SAME.

Application filed Il'uly 25, 1928. Serial K 2953413.

It has been customary prior to my. invention to etch articles'formed of mineral substances such as china, glassware,'marble, brass or other metals, and other materials by placing upon the article to be etched a coating of acid-resisting material and removing such coating so as to expose the underlyingmaterial on the lines of the design it is desired to produce on the article. The article is then submitted to a suitable acid preferably by being given an acid bath and the acid removes the material to a sufiicient depth to produce a sunken or intaglio design. In some instances the design of protecting material is painted by hand on'the article to be etched, or a die is formed by means of which the design of protecting material may be impressed upon the article.

It is customary afterthe design has been etched upon the article to remove the protecting material and to apply an encrusting material such as gold encrusting paste, or lusters in china paint of various kinds, or china paints in the form of a powder. mixed with a suitable mediuinto the etched surface and then to permanently aflix such encrusting material to the articleby firing or application of heat.

Those processes which employ hand work for producing the'design in the protecting material or paintingzthe design on the article with the protecting material require a great deal of time and can only be produced by skilful workmen. The processes which require the forming of a die or mold for the ap plication of a design are expensive and in many particulars unsatisfactory.

It is the object of my invention to'improve existing processes in a manner that will permit a quick'l application of the protecting material in varying artistic designs to the surface to be etched, permitting the designs to be varied to an indefinite extent while anynumher of articles can be produced having designs that produce the same general effect. v

My invention consists generally in an etching process in which a resisting material is poured in a liquid condition onto the surface to be etched in fine streams of varying thicknesses or diameter falling irregularly according to the fancy of the operator upon the surface to be etched and thereafter sub-v jecting the article to action of a suitable acid that removes the exposed material to a sufficient depth to produce a sunken or intaglio design in the unprotected portions of the article, the etched-surface thereafter being preferably provided with an encrusting material permanently aflixed thereto by the usual firing method.

i The'invention consists further in an etched article produced by this process.

In the accompanying drawings forming part of the specification,

Fig. 1 is a perspective view of'a plate formed of china or similar material illustrat ing the process of applying the'protecting material thereto Fig. 2 is a plan view of the plate with the protecting material applied to .the surface to be etched, the main portions of the surface of .the plate that is not to be etched having an acid-resisting coating applied thereto; 7

Figs. 3 and 4 are transverse sectional views of a plate having etched designs produced by the process herein described;

Fig. 5 is a plan viewshowing a portion of a plate etched in accordance with my process;

Fig. 6 is anelevation of a vase etched inaccordance with my process; and

Fig. 7 is a perspective View showing a'can or receptacle that may beused for pouring the protecting material in a fine stream of desired thickness or diameter onto the article to be etched. i r Y 7 In the drawing A represents a plate, vase,

or otherarticle that it is desired'toornament by an acid-etching process; I apply to the surface to be etched an acid-resisting mate'- rial such as turpentine asph altum varnish that is in a fluid condition and capable of being poured in a streamof desired diameter or thickness upon the surface to be etched. One method of "pouring the 'material upon the article'is illustrated in-Fig. l of the'rdrawings in which the materialisbeing poured or allowed to run freely from a brush 13 held in the hand of the operator. Instead of using a brush for this purpose a can or receptacle 0 having a pouring opening or orifice may be employed. An ordinary open pitcher having a pouring lip or mouth may be conveniently used for this purpose.

The operator may vary to a considerable extent the thickness or diameter of the line formed by the stream striking the surface of the article to be etched, as'indicated in the figures of the drawings, wherein fine lines are represented at 2 and considerably thicker to run onto the surface to be etched, may produce iniwhat may be called a free hand way an indefinite variety of designs that are capable of being formed by the lines of varying thicknesses or diameters that are poured or allowed to run onto thesurface to be etched. It will, of course, be impossible for the operator to exactly reproduce any design but the designs may be sulhciently alike so that they'will produce the same general effect and the designs on any number'of articles etched by this process will harmonize but at the same time preserve the individual characteristics of the person that executes each design. For example, a set of the plates, illustrated in Figures 2, 3, 4 and 5 of the drawings, may all be provided with, similar designs although no two of such designs will be exactly alike. l i

It will be understood that the portions of the article indicated at D and E that are not to be attacked by the acid are covered with a coating of the protecting material. After the protecting material has been applied in the manner described, the article is subjected to an acid bath inthe usual manner to permit an etching action that will form a depressed or intaglio design of any desired pattern.

The acid used for etching glassware, china or other ceramic articles is preferably hydrofluoric acid which cannot attack or penetrate. the protecting coating applied to the surface to be etched. The acid acts upon the silica in the glass or china or other pottery article. Where the process is applied for etching articles of metal any suitable acid that will etch the metal may be employed.

Instead of etching the material by means of acid ,1 may apply the protecting material as hereinbefore described and cut away the exposed surface to the desired depth by means ofa suitable sandblast.

. I do not limit myself to the use of any particular protecting material although I have obtained excellent results by using a varnish formed. of asphaltum and turpentine of the right consistency to be readily poured in a thin stream from a brush, can, pitcher, or other suitable receptacle.

acid or a'sandblast. M

The novel features of my invention are, however,.set forthin the following claims.

I claim as my invention:

1. The process of etching articles formed of mineral substances, such as china, pottery or metal, which consists in causing to issue from a holder held a considerable distance from the article a thin stream of a protecting coating on to the surface ofthe article to be etched to form on such surface a free hand line design, permitting such coating to become hardened, and then etching or cutting away the exposed surface of the material to the desired depth.

2. The steps in the process of etching articles formed of mineral substances as china, pottery or metal which consists in causing to issue from a holder held-a considerable distance from the article a thin stream of a protecting coating on to the surface of the article to be etched, to form on such surface a plurality of series of free hand line designs, the lines of the respective series having varying diameters, permitting such coating lines to become hardened and etching or cutting away the exposed surface of the material to the desired depth.

3. The process of acid-etching articles formed of mineral substances such as china, pottery or metal which consists in pouring a thin stream of acid resisting material from a holder held a considerable distance from the article on to the surface of the article to be etched and causing a relative movement between the holderand the article/to form lines therein of varying diameters,permitting such material to become hardened and then acid-etching or cutting away the exposed surface of the material to the desired depth.

In witness whereof, I have hereunto set my hand this 19th day of July, 1928.

MINA W. NOE-RENBERG.

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