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:
Aug. 26, 1986
Filed:
Nov. 28, 1984
John B Morse, Boston, MA (US);
Joseph H Wright, Andover, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A photographic processing liquid applicator having a reservoir for containing a supply of alkaline processing liquid. The upper portion of the reservoir has an egress while a lower portion of the reservoir is provided with an ingress which is in communication with a container of processing liquid. Rotatably mounted within the reservoir is a roller for applying a coating of the processing liquid to a length of sheet material. During each coating operation, a supply of processing liquid greater than that required to coat the sheet material is added to the liquid already in the reservoir, via the ingress, thus causing its level to rise above the egress. Processing liquid is thus skimmed or drained from the surface of the liquid, which liquid would have been most exposed to the adverse affects of the oxygen in the atmosphere.