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:
Jan. 17, 1984
Filed:
Sep. 01, 1981
Applicant:
Inventor:
Heinz Hartmann, Monchaltdorf, CH;
Assignee:
Franz Buttner AG, Zurich, CH;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
4002411 ; 400696 ; 585-1 ; 260D / ; 106 32 ; 428488 ; 428523 ; 428914 ;
Abstract
A lift-off adhesively erasable typewriter ribbon contains, in a pigmentatious layer on the substrate strip, in addition to the pigment and a resin binder, a halogenated hydrocarbon modifier containing at least 14 carbon atoms serving to embrittle the resin binder and facilitate transfer of the layer from the ribbon to the paper during the writing process and to allow clean and adhesive removal of print if a correction is required.