US1565583A

US1565583A - Etched lithographed plate and method of making same

Info

Publication number: US1565583A
Application number: US736283A
Authority: US
Inventors: Frederick H Moore
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-09-06
Filing date: 1924-09-06
Publication date: 1925-12-15
Anticipated expiration: 1942-12-15

Description

Dec. 15, 1925- F. H. MOORE ETCHED LITHOGRAPHED PLATE AND METHOD OF MAKING SAME Filed Sept. 6. 1924 I xv /I17, A 74/ m/ 1 Federz'c/r H Moore M WM Dec. 155, 1925.

cairn STATES FREDERICK H. MOQRE,

OF CHICAGO, ILLINOIS.

ETCHED LITI-IOGRAPHED PLA'IE AND METHQD MAKING SAME.

Application filed September 6, 192%. Serial- No. 736,283.

To all whom it may concern:

Be it known that I, FREDERICK H. Moonn, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Etched Lithographed Plates and Methods of Making Same, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to etched lithographed plates and the method of making the same.

It is a purpose of my invention to provide a metallic member that is coated so as to represent the surface of some other material such as wood or hard rubber or insulating composition and to provide outlines thereon by etching, the outlines being in the coloring of the metal of the plate or other metallic member.

It is more particularly a purpose of my invention to provide a sheet, metal member such as is used for panels in radio receiving sets that has suitable markings or outlines etched therein and which is coated over the surface thereof that does not have the markings so as to represent the surface of some other material than the metal plate or panel member.

it is another purpose of the invention to provide a new and improved method of making an etched lithographed metallic member by first etching a metallic member so as to provide outlines thereon that are offset from the surface of the metallic member and coating said metallic member on the main surface portion thereof that is not offset with a suitable coating-imitating wood or other material having markings or a grain therein. Preferably the coating is done by a lithographic process.

It is still another object of the invention to provide a new and improved method of producing an etched lithographed plate-like member that has outlines etched therein comprising etching said outlines in said plate or other metallic member, applying a base v coat of suitable pigment to said plate by means of a rubber roller of suflicient hardness not to enter the offset portions of the etched member, baking said metallic memher so as to thoroly dry said base coat and then printing by what is known as rubber offset process of lithography, the desired markings on said base coat which are in a color contrasting with said base coat.

Preferably the markings are applied in two stages, the markings being first applied by means of the rubber roller used in the offset process after which the metallic memher is slightly shifted and the markings again applied in the same manner as before. This two coat application of the markings throws the markings slightly out of register and gives a more naturalblending of the markings with the base coat to produce a more accurate imitation of the surface that is to be imitated by said markings.

()ther objects and advantages of the invention will appear as the description of the accompanying drawings proceeds. However, I desire to have it distinctly understood that I do not intend to limit myself to the exact details shown or described but that I intend to include as part of my invention all such obvious changes and modifications of parts as would occur to a person skilled in this art and as would fall within the scope of the claims.

In the drawings:

, Fig. 1 is a cross section of a metallic member or blank that is to be finished in accordance with my improved process;

Fig. 2 is a similar view thereof showing the blank after the same has been etched;

Fig. 3 is a similar view showing the blank after the lithographic coating has been ap-- plied thereto;

Fig. 4 is a fragmentary face view of the finished article; and

Fig. 5 is a section taken thereof on the line 55' of Fig. 4.

Referring in detail to the drawings, the blank of any suitable metallO which has been provided with suitable openings 11 therein wherever desired for the purposes for which it is to be used, is first cleaned in any suitable manner well known in the art. The metal plate is then etched. The etching process comprises first the making of a drawing or design thatconforms to the outline that is to appearon the finished article; the making of a photographic negative of said drawing; the making of a print .ing plate" from said negative by the usual photographic printing process, the plate being. sensitized with the usual emulsion for th s p p se; h p n ing plate is inke with a suitable roller; the metallic plate to be etched is then printed from the printing plate by means of a rubber roller by what is well known in the art as the offset process, this leaving the places to be etched on the finished product bare and coating the metallic plate where no etching is to take place. The metallic plate that is to be etched is then retouched if necessary, to coat any bare places that may exist in the plate due to improper printing and the back of the metallic plate is coated in any suitable manner. The metallic plate is then powdered with an asphaltum powder commonly used for this purpose which adheres to the ink on the plate. The metallic plate is then washed in water and the asphaltum powder is baked on after the washing operation.

The plate is then etched by immersing the same in a suitable acid bath and after the plate has remained in the bath a sufficient length of time to etch the outlines therein as deeply as is desired, the plate is removed from the acid and the coating is removed from the plate by immersion of the same in a suitable solvent solution.

The plate is now in the condition shown in Fig. 2 in which the etched portions 12 thereof are offset from the main surface 13 of the plate 10. In the form of the invention shown, these are etched into the surface of the plate or depressed below the main surface of the plate. Obviously, by coating only the portions of the plate having the outlines that are to be offset, this could be raised, the acid eating away the remainder of the plate so as to slightly raise the outlines.

The plate that is in the condition shown in Fig. 2 is then subjected to the lithographic coating process. This lithographic coating process comprises the application of a basecoat to the etched plate and in the form of the invention shown, this base coat is applied by means of a rubber roller that is hard enough so as not to enter the depressions or etched portions 12, thus coating only the surface 13 with the base coat.

The plate with the coating thereon is then baked, drying the coating and preparing the same for applying the markings thereto, which will produce a finish on the plate imitating the finish of some other material than the metal of which the plate is made.

The markings are applied by preparing a printing plate having the markings there on, which is inked and the ink markings transferred to the metal plate by means of a rubber roller by what is known as the offset process, thus producing markings on the base coat contrasting therewith to represent the markings of the finish that is desired for the plate,

lVhile it is possible to apply these markings in one coat, (which may be baked on when this stage of the process is reached after which the plate is lacquered or varnished and then again baked), preferably the markings are applied in two coats, the rubber roller being again inked from the printing plate and the metal plate being slightly shifted so that the markings when the roller is again passed over the metal plate, will be slightly out of register with the markings originally printed thereon with the first finishing coat. This produces brighter and duller markings or more faint markings, more correctly imitating the surface of such materials as wood, that is varnished or polished, or other materials having markings thereon to represent the finished surface of wood.

After the second coat has been printed on the metallic plate, the plate is again baked to dry these coats of markings, after which the plate is lacquered or varnished to provide a protective coating for both the etched and lithographed surfaces of the plate.

In Fig. 3 the plate is shown with all of the coatings applied thereto, including the base coating and the markings, said coatings as a whole being indicated by the numeral let, it being noted that the etched portions 12 having no coating thereon.

In Figs. 1 and 5 the finished plate is shown with the protective coating of varnish or lacquer 15 covering both the lithographed surface 14 and the etched portions 12.

The process described above produces a plate with a permanent finish in contrasting colors, the etched portions being of the coloring of the material of the metallic plate. For example, where the plate is made of brass, these would appear to be of a golden or gilded color, while if some whiter metal such as aluminum were used, these would appear as silvery markings.

Having thus described my invention, what I desire to claim and secure by United States Letters Patent is:

1. The method of making an etched, coated plate comprising etching a smooth plate to provide relatively deep and narrow outlines thereon offset from the surface of said plate and lithographing the surface of sa d. plate after said plate has been etched.

2. A. method. of the character described comprising etching a smooth surfaced metallic member to provide relatively deep and narrow outlines thereon ofiset from the surface of said member and lithographing the surface of said member after the same has been etched.

3. A method of the character described comprising etching a smooth surfaced metallic member to provide relatively deep and narrow outlines thereon offset from the surface of said member, applying a base coat to the portion of said metallic member that is not offset from the surface of said member and printing markings of a contrasting color on said base coat.

4-. A method of the character described comprising etching a smooth surfaced metal lic member to provide relatively deep and narrow outlines thereon offset from the surface of said member, applying a base coat to the portion of said metallic member that is not offset from the surface of said member and printing markings of a contrasting color on said base coat by the offset process.

5. A method of the character described comprising etching a smooth surfaced metallic member to provide relatively deep and narrow outlines thereon offset from the surface of said member, applying a base coat to the portion of said metallic member that is not offset from the surface of said member, baking said member to dry said coat, printing markings of a contrasting color on said base coat and baking said member to dry said coat.

6. A method of the character described comprising etching a smooth surfaced metallic member to provide relatively deep and narrow outlines thereon offset from the surface of said member, applying a base coat to the portion of said metallic. member that is not offset from the surface of said member, printing markings of a contrasting color on said base coat, shifting said member.

slightly and again printing said markings thereon.

7. A method of the character described comprising etching a smooth surfaced metal lic member to provide relatively deep and narrow outlines thereon offset from the surface of said member, applying a base coat to said member by means of a roller of sufficient hardness not to enter said offset etched outlines thereon and applying markings of a contrasting color on said base coat.

8. A method of the character described comprising etching a smooth surfaced metallic member to provide relatively deep and narrow outlines thereon offset from the surface of said member, applying a base coat to said member by means of a roller of sufficient hardness not to enter said offset etched outlines thereon and applying markings of a contrasting color on said base coat, said markings being applied in a plurality of coats and said member being slightly shifted upon applying successive coats of said markings to throw the markings of different coats out of register.

9. A sheet metal member having relatively deep and narrow outlines etched therein to offset the same from the surface thereof and a surface coating on said member covering the smooth surface thereof, said deep narrow outlines being uncoated.

10. Asheet metal member having a lithographed surface provided with etched unlith-ographed portions offset from said surface.

11. A sheet metal member having a lithographed surface and etched relatively deep and narrow unlithographed outlines on said surface. v y

In Witness whereof, I hereunto subscribe my name this 4th day of September, A. D. 1924:.

rnnnnnror: I-I. Moons.