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:
Dec. 16, 1986
Filed:
May. 24, 1985
Applicant:
Inventor:
Irving Erlichman, Wayland, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 / ; 346105 ; 400120 ;
Abstract
A closed loop thermal transfer recording system and color transfer ribbon having a plurality of different color ink stripes thereon are provided for recording a color tonal image on a recording sheet. Precise control over the size of dots formed by ink transfer is achieved by monitoring the density of a thermally sensitive indicator layer on the back side of the ribbon which provides, for each different ink color, indicator marks that are proportional to recorded pixel density, and feeding this information back to a control system which compares monitored density with desired density and regulates heat input to the ribbon accordingly.