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:
Aug. 09, 1977
Filed:
Sep. 24, 1975
Applicant:
Inventors:
Detlef Winkelmann, Wiesbaden-Biebrich, DT;
Bernd Lohr, Wiesbaden, DT;
Helmut Stieger, Wiesbaden, DT;
Assignee:
Hoechst Aktiengesellschaft, , DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 10 ; 96 / ; 361225 ;
Abstract
Apparatus for producing positive enlarged copies from positive or negative microfilm, in which the photoconductive element can be charged either negatively or positively so that one developing liquid containing particles of only one polarity can be used to create positive copies regardless of whether the original microfilm is positive or negative. The apparatus includes a reusable photoconductive web having an aluminum backing, a perforated development electrode, and a transfer station for transferring the developed image to paper.