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:
Aug. 01, 1978
Filed:
Jan. 10, 1977
Applicant:
Inventors:
William L O'Brien, Waterloo, CA;
Wayne M Doran, Kitchener, CA;
Assignee:
NCR Canada Ltd. - NCR Canada Ltee, Mississauga, CA;
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
101 9303 ; 101 9319 ;
Abstract
In impact printing mechanism for encoding magnetic or optical characters on documents, a hammer energy control is utilized for maintaining constant impact pressure for the various surface areas of such characters. The constant impact pressure is derived by selection of the correct hammer pulse width for the surface area of each character.