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Patent Searching and Data


Title:
COVER FILM FOR COLOR HARD COPYING PAPER
Document Type and Number:
Japanese Patent JPS6023096
Kind Code:
A
Abstract:

PURPOSE: To provide the titled film with which a colorless transparent protective film can be easily provided on a color-printed surface, wherein a resin layer only a heated part of which can be easily welded to the surface of a copying paper and released from the base is provided on the base.

CONSTITUTION: A thin film B of a resin not adhesive to the heat-resistant base A such as a polyester film, e.g., a cellulose acetate resin, is provided on the surface of the base A, or the surface of the base A is subjected to a releasing treatment. Thereafter, a resin layer C in which a sublimable dye or the like is diffused or sorbed and only a heated part of which can be easily welded to the surface of a copying paper and released from the base A to form a transparent protective layer, is provided thereon to produce the objective cover film. A porous foamed material, a resin having dispersed therein a powder of a resin having high transparency and a distinct melting point or softening point, a paraffin wax or the like is preferably used for forming the resin layer C.

EFFECT: The cover film can be supplied as a connected body, and operating efficiency is enhanced.


Inventors:
KOBAYASHI NAOTAKE
ABE TETSUYA
SHINOHARA SATORU
FUJIWARA YOSHIO
Application Number:
JP13235083A
Publication Date:
February 05, 1985
Filing Date:
July 19, 1983
Export Citation:
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Assignee:
SONY CORP
International Classes:
B41M5/382; B41M5/50; B41M5/52; B41M7/00; (IPC1-7): B41M5/26
Domestic Patent References:
JPS5019436A1975-02-28
JPS4968828A1974-07-03
JPS5613173A1981-02-09
JPS57105395A1982-06-30
JPS58110286A1983-06-30
Attorney, Agent or Firm:
Hidekuma Matsukuma