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:
Apr. 06, 1976
Filed:
May. 28, 1974
Daniel A Coberley, Danville, IL (US);
Hurletron Altair, Danville, IL (US);
Abstract
A register control system is disclosed for maintaining longitudinal or lateral register of a moving web wherein a comparator has a first input controlled in accordance with error count and has a second input controlled by a resistance-capacitance timing circuit with a non-linear characteristic such as to compensate for the non-linear characteristic of the digital to analog converter responsive to error count, and thus to provide a correction motor on time linearly proportional to error count. An adaptive circuit is provided responsive to web speed and providing for a correction cycle with respect to each repeat length of the web at relatively low web speeds, but providing for skipping of alternate error cycles at higher web speed.