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. 16, 1986
Filed:
Jul. 06, 1984
Benzion Landa, Edmonton, CA;
Oded Sagiv, Ramat-Gan, IL;
Aron Shmaiser, Rishon-Le-zion, IL;
Richard J Bernhauer, Binghamton, NY (US);
Peter Feher, Johnson City, NY (US);
Savin Corporation, Stamford, CT (US);
Abstract
An optical scanning system for a variable-magnification electrophotographic copier includes a first scanning carriage reciprocated along a path by endless bands attached to the carriage at transversely spaced locations and driven purely by friction. Pulleys mounted on a second scanning carriage at transversely spaced locations roll between the drive bands and stationary guides to move the second carriage at half the speed of the first carriage. The second carriage may be shifted relative to the first carriage by moving it to a location at which arms lift the pulleys from the guides. A flywheel rotating at the desired scanning speed is coupled to the scanner drive train after the drive train has been smoothly accelerated to the desired scanning speed, and is uncoupled from the scanner drive train before the drive train is decelerated at the end of the scanning stroke. Misalignments between the separately driven ends of the first carriage are corrected by intercepting the carriage ends to induce differential slippage in the portions of the drive train coupled to the respective carriage ends. Similar misalignments between the separately driven ends of the second carriage are corrected by commonly rotating gears at the respective carriage ends that mesh with fixed teeth at one end of the scanning path. Misalignments between the first and second carriages are corrected by a gear, carried by one of the pulleys of the second carriage, which meshes with a normally immobilized gear as the second carriage moves past the same location.