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:
Jun. 23, 1981
Filed:
Jun. 14, 1979
Applicant:
Inventors:
Paolo Cielo, Dartmouth, CA;
William D Westwood, Nepean, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219216 ; 3461 / ;
Abstract
A thermally activated liquid ink printing head has a plurality of orifices in a wall of an ink reservoir, the ink retained in the orifices by surface tension. Electrical heating elements heat the ink in the orifices, the ink being caused to pass across to a paper sheet positioned adjacent to the orifices. The orifices may extend in a line across the head or may be in other predetermined patterns, such as for printing alpha-numerics a character at a time. The ink may be completely or partly vaporized. The heating current may flow through the ink.