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:
Apr. 19, 1977
Filed:
Jul. 03, 1974
Willard J Holman, Barrington, IL (US);
Morris Tolliver, Streamwood, IL (US);
Addressograph Multigraph Corporation, Cleveland, OH (US);
Abstract
Apparatus for developing diazo type films includes an ammonia chamber having an electrically heated heat transfer plate disposed therein dividing the ammonia chamber into upper and lower portions. Two pairs of rollers are disposed at opposite ends of the ammonia chamber in parallel relationship to the transfer plate for transporting the film over the heat transfer plate. A pressure roller is positioned within the upper portion of the ammonia chamber above the heat transfer plate for maintaining the film in intimate contact with the plate to provide for an efficient transfer of the heat between the heat transfer plate and the film. An inlet for an ammonia gas developer is provided in the lower portion of the ammonia chamber, and passages are provided around the heat transfer plate to permit the ammonia gas developer to flow around the plate and into the upper portion of the ammonia chamber while being heated by the plate.