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:
Oct. 24, 1978
Filed:
Nov. 29, 1976
Larry Allen Songer, Schaumburg, IL (US);
Thomas Vernon DeRyke, Libertyville, IL (US);
Addressograph-Multigraph Corporation, Los Angeles, CA (US);
Abstract
An apparatus for developing diazotype copy sheets is provided and comprises a duct element having an ingress and an egress end, a distribution element having an ingress end and a closed end, a manifold at the ingress ends of the duct and the distribution elements and a heater element proximate the duct element. All of the elements are enclosed within a developer tank provided with a perforated section adjacent a copy sheet developing station. Aqueous ammonia is supplied to the ingress end of the duct element and travels in a first path by gravity towards the egress end thereof. In its travel in the first path the aqueous ammonia is vaporized by the heater element thereby causing separation of the aqueous ammonia into a first portion of residue water comprising hot water and a trace of ammonia, and a second portion comprising ammonia gas and steam. The first portion exits from the egress end of the duct element to a waste eliminator device and the second portion travels in the opposite direction in the first path to the manifold which directs the second portion to the distribution element for travel in a second path. The second portion is expelled from ports provided in the distribution element to generate a gaseous ammonia atmosphere which passes through the perforated section of the developer tank and impinges upon a copy sheet to be developed at the developing station.