DIFFERENTIAL GEAR FOR DRIVING ROLL EQUIPPED WITH DISTORSION DETECTING MECHANISM FOR SHEET REGISTER

摘要

PURPOSE: To reduce cost by enhancing the performance of deskewing in conveying copy sheets. CONSTITUTION: A pair of drive rolls 12, 14 and a drive system for commonly driving both drive rolls 12, 14 are used. A differential drive mechanism 20 is provided for changing the relative angular position of one of the rolls with respect to the other rolls to deskew a copy sheet. A control system is supplied with inputs representative of the skew of the copy sheet and controls the differential drive mechanism to deskew the copy sheet.