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:
Nov. 16, 1993
Filed:
Dec. 28, 1992
Paul D Keller, Webster, NY (US);
Elizabeth D Fox, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An improved sheet stacking apparatus for stacking a wide variety of sheets, especially small sheets, using a rotatable disk stacking unit that receives each sheet in slots defined by fingers on the disks and rotates to invert the sheets. Closely adjacent fixed axis corrugating frictional drive rollers engage the trail edge area of the sheet by the rotation of variable radius disks to larger radius areas thereof which interdigitate with these fixed drive rollers, so that the trail edges of sheets being inverted by the disk contact and are driven by the corrugating rollers. The periphery of the frictional drive rollers is inside of the maximum radius of the disk stacking unit and outside of its minimum radius, so as to be only intermittently interdigitated therewith.