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. 06, 1981
Filed:
Jun. 26, 1978
Rudolf Dobler, Furstenfeldbruck, DE;
Klaus Weber, Leverkusen, DE;
AGFA-Gevaert, A.G., Leverkusen, DE;
Abstract
Apparatus for detection of holes in a running web of photographic paper has a U-shaped housing with two spaced-apart legs between which a portion of the web travels toward a severing device. One leg of the housing contains several photoconductive detectors, and the other leg of the housing contains the light emitting portion of a light conducting prism whose light admitting portion is adjacent to a light source mounted in the housing inwardly of the detectors. The prism disperses the incoming light so as to uniformly illuminate the web portion in the gap between the two legs of the housing. The light source, the detectors and an amplifier for signals which are transmitted by the detectors are mounted on a plate which further carries conductors connecting the detectors with the amplifier.