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:
Mar. 16, 1982
Filed:
Oct. 03, 1980
Stephen W Carter, Lexington, MA (US);
Harvey S Friedman, Sudbury, MA (US);
Irving S Lippert, Lexington, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A method for assembling photographic processing systems of the type for advancing integral, self-processable film units to the exterior of a camera while simultaneously spreading a fluid processing composition in a uniformly thin layer between selected layers of a film unit. A number of processing rollers which comprise the system are provided with a partially textured surface by using an electric discharge machining process having predetermined conditions, and then a number of test processing systems are assembled with these rollers and other pieceparts randomly selected from lots of all other pieceparts which comprise the system. Characteristic film units are processed through the test processing systems, and the fluid layer thickness in each of these film units is afterwards measured and compared with a predetermined standard. If the combination of test system parts provides acceptable fluid layer thickness control performance, the remaining pieceparts of each lot are used in combination with rollers having the predetermined texturing to manufacture additional systems. If the test system performance is not acceptable, the electric discharge machining process conditions are adjusted by a predetermined amount which is sufficient to effect minor changes in fluid layer thickness control that can result in acceptable performance. Rollers are then textured with the adjusted electric discharge machining process and systems are then assembled using the piecepart lots in combination with rollers having surfaces textured according to the adjusted electric discharge machining process.