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:
Oct. 15, 1985
Filed:
Dec. 24, 1984
Applicant:
Inventors:
Irving Erlichman, Wayland, MA (US);
Robert W Hausslein, Lexington, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ; B41M / ;
U.S. Cl.
CPC ...
346 / ; 400120 ; 219216 ; 250318 ; 346-11 ;
Abstract
A closed loop thermal recording system and method are provided for recording a grey scale image on a transparency type of thermally sensitive recording medium in accordance with electronic image signals. The application of thermal energy to the medium is controlled, in part, by a feedback subsystem that optically monitors pixel area density while recording is in progress. The recording system includes a light reflective background member, located between a transparent recording layer of the medium and a thermal print head, for improving the accuracy and reliability of the optical monitoring process.