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:
Jul. 02, 1985
Filed:
Sep. 06, 1983
James J Livingston, Waltham, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A method of and system for supplying processing material to a photographic sheet so as to control material supplied thereto are disclosed. Included in the method are the steps of supplying processing material to the photographic sheet; and detecting a reference area on the sheet. The detecting step includes transmitting at least a beam of measured energy to the reference area and generating a signal responsive to a change in a measured characteristic of the reflected beam from the area which signal is representative of material being present or absent in the area. The output of processing material supplied is varied to the sheet responsive to the generated signal so as to restore the reference area to its condition before the signal.