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. 07, 1976
Filed:
Apr. 21, 1975
Applicant:
Inventor:
Gary S Shaber, Villanova, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356202 ; 250559 ; 250578 ; 3402 / ; 354298 ;
Abstract
A method and apparatus for determining the operational status of a photographic film processor, particularly an X-ray film processor. A photographic film is exposed to a test pattern including at least three areas to produce, upon development of said test film, a light (medium density) area, a dark (high density) area and an unexposed (base fog) area. The test film is then developed, and densitometer readings made of the resultant film densities in the test areas. These densitometer readings are used as inputs to digital logic circuitry to produce a series of diagnostic indications of the processor's operational status.