US652751A

US652751A - Coating or covering vulcanized plates with metal.

Info

Publication number: US652751A
Application number: US72656899A
Authority: US
Inventors: John A Daly
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-08-08
Filing date: 1899-08-08
Publication date: 1900-07-03
Anticipated expiration: 1917-07-03

Description

No. 652,751. rammed: July 3, I900.

J. A. DALY.

COATING 0R COVERING VULGA NIZED PLATES WITH METAL. (Appliczitinn filed Aug. 8, 1899.)

(No Model.)

fileclro-clepou'f-mel'al. I Mlllz'c eier.

Vulcanized.

1M. (Swot/w I I m: Momus PETERS co., mom-Limo" wnsumcmu. 11c.

UNITED STATES PATENT OFFICE.

JOHN A. DALY, OF \VASHINGTON, DISTRICT OF COLUMBIA;

fioATlNc oR COVERING VULC'ANIZED PLATES WITH METAL.

SPECIFICATION forming part 6% Letters Patent no. 652,751, dated July a, 1906.

Application filed August 8, 1899. fierial No, 726,568. (No specimens.)

T0 all whom, it may con/00741,:

Be it known that I, JOHN A. DALY, a citizen of the United States, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Coatin g or Ooverin g Vulcanized Plates with Metal, of which the following is a specification, reference bei n g had therein to the accompanying drawing.

- This invention relates to the covering or lining of vulcanized dental or similar plates with a metal coating.

In my Patent No. 390,950, dated October 9, 1888, I describe a metallic foil (gold-foil) having one spongy face, with one bright or burnished face. In my Patent No. 390,654 of the same date I describe a method of attaching such foil to a dental plate.

lic lining other than foil and is especially intended for dental plates, although applicable to other vulcanized plates.

The drawing illustrates the general arrange ment of the plate, interposed metallic substance, and electrodeposited lining.

I take a vulcanized dental plate of the usual vulcanized rubber compound or of celluloid, Xylonite, or thelike, preferably when the same is complete as made by us'ual processes and ready for use. The surface which is to be covered with metal I roughen or scratch and then apply a thin coating of celluloid, collodion, or xylonite varnish, which is generally a solution of celluloid in a solvent, such as camphor, ether, or alcohol. While the Xylonite or other varnish is sticky, I cover the same with a powder of comminuted metalsuch as brass or tin filings or powder or fine bits or scraps of nickel, silver, or other metalor a metallic foil having a rough or spongy face might be applied to the sticky varnish. When the varnished surface is well covered with metallic dust or the like, the plate may be heated, when the celluloid will become dry and hard, firmly attaching themetallic powder thereto. When dry or partly dry, the dusted, metalized, or bronzed surface can be burnished down with a tool and the metal will present a burnished surface having almost the appearance of foil. This metallic My present ink vention applies to the production of a metal surface may be increased in thickness by the electrodeposition of a metal, which metal should preferably be gold.

Instead of applying a base-metal powder to the plate the plate may be covered in such parts as need covering with a tacky solution of Xylonite and gold-dust,or irregular or rougli gold may be sifted thereon and burnished down, or the gold-dust or bronze maybe mixed with the celluloid or Xylonite solution and painted on the vulcanized plate, and when dry the surface of the projecting bits of metal maybe burnished until a foil or film is formed. 1 The advantage of the present process over such as'require vulcanization is in the cheapnessof the process and product. I do not consider theresulting plate equal to my plate, in which a spongy foil is vulcanized to a dental plate; but nevertheless the present process may be used for cheaper kinds of work.

The purpose of lining any vulcanized dental plate with metal (which metal usually has a gold finish) is to prevent the secretions of the mouth from attacking the rubber or other material of the body of the plate and producing deleterious or poisonous compounds or gases. Oelluloid'or Xylonite, especially when dissolved in spirits of camphor, produces a cement which is little subject to disintegration by the fluids of the mouth or stomach and is therefore well adapted for use as an agent for the attachment of powdered, shredded, or comminuted metal to a vulcanized plate.

The drying of the varnish or cement may be hastened by heating.

WVhat I claim is l. The method of coating a vulcanized dental or similar plate, which consists in applying'a coating of the described adhesive solution, applying thereto a quantity of comminuted metal, and drying the same.

2. The method of coating a vulcanized dental or similar plate, which consists in applying thereto a solution of celluloid, applying irregular portions of metal thereon, and burnishing the metal to form a substantiallysmooth metallic surface, substantially as described.

3. The method of coating a vulcanized rubber dental plate, which consists in coating the previously-vulcanized dental plate with a celluloid solution, covering the celluloid with metal having an irregular structure, and bur- 5 nishing the metal into the celluloid to secure firm attachment and electrodepositing a coat of metal thereon, substantially as described.

In testimony whereof I alfix my signature in presence of two Witnesses.

JOHN A. DALY.

Vituesses:

W. A. BARTLETT, S. A. TERRY.