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:
May. 09, 1978
Filed:
Apr. 29, 1976
Gary W Ahlquist, Webster, NY (US);
Michael K Milley, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Apparatus for measuring the length of each of a series of continuously advancing and non-transparent articles, each article possessing an actual length L distributed about a predetermined or nominal length L.sub.o. In one embodiment the apparatus comprises two radiation/sensor pairs spaced apart by the nominal length L.sub.o. The radiation/sensor pairs are positioned along an axis parallel to the direction of article advancement. One radiation/sensor pair acts as a trigger to indicate when either the leading or trailing edge of the advancing article reaches a predetermined position, at which time the signal developed from the remaining radiation/sensor pair is memorized or recorded. This memorized voltage is an indication of the position of the leading or trailing edge of the advancing article and thus is a measure of the article's actual length. Disclosed apparatus includes a circuit to compensate for the effects of temperature variations, component drift, etc.