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:
Dec. 30, 1980
Filed:
Jan. 15, 1979
Richard W Jackson, Barrington, IL (US);
Terry G Seelenbinder, Elk Grove Village, IL (US);
AM International, Inc., Los Angeles, CA (US);
Abstract
Developing apparatus for diazo copy sheets is provided wherein the development chamber is supplied with anhydrous ammonia gas drawn from the region above the liquid ammonia solution in a reservoir. The ammonia gas is withdrawn from the reservoir by a pump which moves it into the development chamber. Due to the gas inflow inspired by the pump, the gas mixture in the chamber is caused to migrate out of the chamber by a return conduit whose outlet end is positioned below the surface of the liquid in the reservoir. The copy sheet transport means is a roll which occupies a mouth formed in a wall of the development chamber, and means are provided for effectively sealing the chamber contact margins against the roller to prevent escape of gas therefrom. The development chamber is arranged to snap over the roller and to be largely supported and positioned thereby. Means are also provided for forming and maintaining a pool of water in the chamber, and a heater within the transport roll aids in vaporizing the water to aid development while also guarding against undue moisture absorption by a copy sheet being developed.