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. 05, 1983
Filed:
Aug. 10, 1981
Roger C Palmer, Edmonds, WA (US);
Intermec Corporation, Lynnwood, WA (US);
Abstract
After discussion of a typical prior art thermal printer that is capable of providing precise printing of machine-readable characters on a thermal print medium through the use of an electrically-resistive thermal print element, a thermal model of the thermal print element and the heat transfer relationships between the thermal print element and its surrounding environment is constructed. From this thermal model, an equivalent electrical model is constructed which provides a signal representing the estimated temperature of the thermal print element. This signal is then used to control the exposure time of the thermal print (the time that is sufficient to raise the temperature of only an incremental area of the thermal print medium in uniform contact with the thermal print element to or above the threshold temperature) and to control the rest time of the thermal printer (the time following the exposure time that is sufficient to allow the temperature of the thermal print element to decrease to a value that will not result in additional exposure of the thermal print medium upon movement thereof).