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:
Jan. 28, 1986
Filed:
Oct. 22, 1984
Applicant:
Inventor:
Wilhelm Nitsch, Munich, DE;
Assignee:
Agfa-Gevaert Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
355 72 ; 355 29 ; 355 32 ; 355 71 ;
Abstract
In a photographic copying apparatus, a device for threading a starting end of a new copying paper roll includes drive rollers, a guide support for the advanced paper and a pivotable flap which periodically closes on the paper when the advancement is interrupted for a threading process. An opening is formed in the flap to produce a test copy for controlling the operation of the apparatus. An exposure control device loads the test copy with empirically determined amounts of light when no negative is present on a negative platform of a printing station.