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. 23, 1993
Filed:
Nov. 23, 1992
John F Derrick, Williamson, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Sheet stacking utilizing an orbital nip system by initially orbiting the nip with the sheet in the nip until the nip angle is aimed well up on the registration stacking wall above the stacking tray and adjacent the desired maximum stack height even if the tray is empty; feeding the sheet in this initial nip position out towards the wall at a preset nip feeding velocity without substantially orbiting the nip; then, when the edge of the sheet is within approximately 10 millimeters of the registration stacking wall, starting to orbit the nip with the sheet in the nip, away from the wall and downwardly at an orbiting angular velocity which is substantially slower (0.4 to 0.6) than the nip feeding velocity, so that the movement of the sheet into engagement with the wall is substantially faster than the orbital motion of the nip away from the wall, and causing the portion of the sheet downstream of the nip to downwardly buckle and hold the sheet edge against the wall as the remainder of the sheet is fed through the nip. Improved inverted or non-inverted stacking is provided.