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. 10, 1989
Filed:
Apr. 24, 1986
Applicant:
Inventor:
Ralf M Brooks, Waterloo, CA;
Assignee:
NCR Canada Ltd. - NCR Canada LTEE, Mississauga, CA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
364519 ; 346 / ; 219216 ; 364557 ;
Abstract
Method and apparatus for control of the temperature of a thermal printing device. Thermoelectric heat pumps are used to cool a thermal print head which does not cool between cycles sufficiently below the threshold temperature for the thermal paper or thermal transfer ribbon being used, due to heat build-up, particularly during high-speed operation. A sensed thermal print head temperature is digitized and compared to a reference temperature for a determination of whether or not operation of the heat pumps should be initiated or halted.