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. 30, 1979
Filed:
Jan. 26, 1978
Eckehard Stein, Frankfurt, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
The invention relates to a vaporizer for generating developer gas, containing ammonia, from aqueous ammonia for developing diazo copying material, comprising a rectifying column with a transfer section, a substantially closed column head with a cover plate and a base plate, a first connecting branch for taking off the developer gas and a second connecting branch for feeding in aqueous ammonia opening into the column head, and a heated, steam-generating sump vessel at the foot of the transfer section, which includes a weir for liquids, which is located in the column head between the cover plate and the base plate below the connecting branches but above the transfer section, extends substantially over the entire cross-sectional area and has at least one passage orifice for liquid and at least one passage orifice for vapor.