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:
Sep. 01, 1981
Filed:
Oct. 09, 1979
Applicant:
Inventors:
Assignee:
Sipca Holding S.A., Glarus, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
427150 ; 101135 ; 260 / ; 260D / ; 282 275 ; 427151 ; 525472 ; 525488 ; 525507 ; 525508 ;
Abstract
A desensitizing ink for wet offset printing on the acceptor surface of a chemical duplicating set of superimposed sheets where one of the sets has an electrophilic acceptor coating and the other a nucleophilic coating for producing a chromogenic reaction wherein the nucleophilic desensitizing ink contains an alkoxylated nucleophilic compound which permits a continuous ink transfer to the water repellant zones of the wetted impression plate of an offset press and simultaneously neutralizes the corresponding zones of the acceptor surface.