Selective metallic transfer foils for xerographic images

• US 4,868,049 A
• Filed: 05/21/1987
• Issued: 09/19/1989
• Est. Priority Date: 02/05/1985
• Status: Expired due to Fees

• Current Assignee: Esselte Letraset Limited St Georges House
• Original Assignee: Omnicomm Systems Incorporated (Anju Software, Inc.)
• Inventors: Nelson, Marshall A.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Katz, M. A.
• Application Number:
  US07/053,066
• Time in Patent Office: 852 Days
• Field of Search: 428/343, 428/353, 428/354, 428/344, 428/328, 428/331, 428/323, 428/144, 428/145, 428/148, 156/247
• US Class Current: 428/328
• CPC Class Codes: B32B 37/1284 Application of adhesive
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: B41M 7/0027 using protective coatings or layers by lamination or by fusion of the coatings or layers
• CPC Class Codes: G03G 8/00 Layers covering the final reproduction, e.g. for protecting, for writing thereon
• CPC Class Codes: H05K 3/046 by selective transfer or selective detachment of a conductive layer
• CPC Class Codes: Y10S 283/902 Anti-photocopy
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/2804 Next to metal
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

The present invention is directed to a metal foil transfer sheet for selectively transferring metallic foil to xerographic images on a receiving substrate such as paper. The transfer sheet comprises, in successive layers, a carrier film, a metallic film and an adhesive, the adhesive containing a dispersion of 0.5 micron or larger particulate material. In the preferred embodiment, the invention comprising an assembly for a metal foil transfer sheet and a backing sheet.

Claims

1. A metal foil transfer sheet for selectively transferring a metal film to a xerographic image, the transfer sheet comprising, in successive layers:

a carrier film,

a metallic film comprising a metal selected from the group consisting of aluminum, copper, chromium, tin, silver, gold and mixtures thereof, and

an adhesive layer bonded to the metallic film and which is suitable to cause a selective transfer of the metallic film to the xerographic image, the adhesive layer comprising a resin and a dispersion of 0.5 micron or larger particulate material.

2. A metal foil transfer sheet as in claim 1 attached at an upper edge to a backing sheet to form a metal foil transfer sheet assembly.

3. The metal foil transfer sheet assembly of claim 2 wherein the particulate material comprises titanium dioxide in a ratio of about 4 parts titanium dioxide to 3 parts resin.

4. The metal foil transfer sheet of claim 1 wherein the transfer sheet comprises in successive layers:

the carrier film,

a release coat,

a polymer coat,

the metallic film,

a primer and

the adhesive.

5. The metal foil transfer sheet of claim 1 wherein the metallic film comprises vacuum deposited metal.

6. The metal foil transfer sheet of claim 1 wherein the resin comprises an acrylic resin and a vinyl chloride-vinyl acetate copolymer resin.

7. A metal foil transfer sheet for selectively transferring a metal film to a xerographic image, the transfer sheet comprising, in successive layers:

a carrier film;

a metallic film comprising a vacuum deposited metal selected from the group consisting of aluminum, copper, chromium, tin, silver, gold and mixtures thereof; and

an adhesive layer bonded to the metallic film and which is suitable to cause selective transfer of the metallic film to the xerographic image, the adhesive layer comprising a resin and containing a dispersion of 0.5 micron or larger titanium dioxide particulate material in a ratio of about 4 parts titanium dioxide to 3 parts resin.

8. The metal foil transfer sheet of claim 7 wherein the thickness of transfer sheet excluding the carrier film is between about 0.02 mils to bout 0.06 mils.

9. The metal foil transfer sheet of claim 7 wherein the thickness of the transfer sheet, excluding the carrier, is about 0.03 mils.