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:
Jul. 19, 1988
Filed:
May. 05, 1986
Ralf M Brooks, Waterloo, CA;
Brian P Connell, Elmira, CA;
NCR Canada Ltd. - NCR Canada LTEE, Mississauga, CA;
Abstract
A thermal printing apparatus and method are disclosed which allows a plurality of thermal print head elements to remain concurrently active, with each individual element being capable of remaining active for a time duration unique to itself and independent of burn times required by the remaining elements. This individual element burn time control is obtained by the high-speed loading and reloading of the thermal print head shift register, with the contents of the individual shift register cells being the controlling factor. Once the thermal print head element resistances have been dynamically measured, specific energies are derived for each element in the printhead by modulating the on time for each element, thus allowing grey scale printing and the like.