The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 1981
Filed:
Oct. 18, 1978
Applicant:
Inventors:
John V Andersen, Vaerlose, DK;
Guido Dessauer, Duesseldorf-Gerresheim, DE;
Assignees:
Feldmuhle Aktiengesellschaft, Dusseldorf, DE;
Aktieselskabet For Kontor Kemi, Glostrup, DK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41L / ;
U.S. Cl.
CPC ...
282 275 ; 428220 ; 428240 ; 428323 ; 428340 ; 428486 ; 428488 ; 428914 ;
Abstract
A donor material for carbonless copying by contact with an acceptor material under applied pressure includes a sheet of paper or the like, and a coating on one face of the sheet. The coating consists essentially of a dye precursor, a wax solid at 20.degree. C. and capable of dissolving the precursor, and a liquid activator soluble in the molten wax, but at most sparingly soluble in the solid wax and incapable of dissolving the dye precursor, the wax and activator being chemically inert to the dye precursor.