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:
Jul. 17, 1990
Filed:
Nov. 15, 1988
Theodore Winkler, Levittown, PA (US);
Brandt, Inc., Bensalem, PA (US);
Abstract
Skew-correcting apparatus in which first and second sets of opposing feed rollers each comprise a pair of end rollers and a center roller between the end rollers. The first center roller has a sheet-gripping portion of limited circumferential extent forming a nip with the second center roller, while the first pair of end rollers engage the second pair of end rollers. The second set of rollers are coupled for common rotation; the first pair of end rollers are mounted for rotation relative to the first center roller. The first center roller is driven while the remaining rollers are retarded so that the remaining rollers are normally stationary to align the leading edge of a sheet but are driven by the sheet-gripping portion of the first center roller to advance the sheet through the nip. A downstream feed roller driven synchronously with the first center roller and also having a sheet-gripping portion of limited circumferential extent is used to advance a sheet to the opposing sets of feed rollers.