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. 13, 1987
Filed:
Oct. 24, 1985
Joseph J Bakewell, Boxford, MA (US);
Dynamics Research Corporation, Wilmington, MA (US);
Abstract
A thermal print head comprising a laminated structure having a dielectric sheet containing a plurality of electrodes having ends terminating along a common edge, and a conductive ground sheet disposed on the opposite side of the dielectric sheet from the electrodes and also terminating at the common edge. A resistive material is provided along the common edge in contact with the ground plane and electrodes. When power is applied to a selected electrode, a conductive path is established from the electrode through a portion of the resistive material and into the ground plane to complete an electrical circuit for heating the activated portion of resistive material which serves as a printing element for marking of thermal paper confronting the common edge of the print head. In an alternative embodiment, multiple rows of electrode ends can be grouped opposite to respective ground planes and can be energized in a multiplex addressing mode.