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:
Nov. 27, 1979
Filed:
Nov. 04, 1977
Applicant:
Inventor:
John Pone, Jr, Minneapolis, MN (US);
Assignee:
Pako Corporation, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
355 68 ; 355 77 ; 355 38 ;
Abstract
The photographic printer of the present invention stores measured gamma values for the photosensitive medium upon which prints are to be made. The gamma values modify exposure times so that the operator button corrections always correspond to a known increment in density. When the photosensitive medium is changed, new gamma values are entered and the printer again modifies exposure times by the appropriate amount so that button correction increments remain constant despite the change in paper gamma.