Automatisches Blattfördersystem mit aktiver Ausrichtung.

摘要

An automatic sheet feed alignment system is described for feeding sheets (75) of print media such as paper to print mechanism in alignment with the print mechanism. A single motor drives a main sheet advance roller (60), and is also coupled to a sheet pick roller (55) through a non-reversing clutch. In idler roller (65) is disposed adjacent the drive roller (60). To feed a sheet (75) into the print position, the motor drives the main drive roller (60) and sheet pick roller (55) in a sheet advancing direction, until the sheet leading edge is advanced into and past the nip between the main drive (60) and idler rollers (65). The motor direction is then reversed so that the main roller (60) retracts the sheet (75). Because the sheet pick roller (55) is not driven in the reverse direction, a buckle (80) is formed in the sheet (75) between the sheet pick roller (55) and the nip, tending to align the leading sheet edge with the nip. The motor direction is then reversed to drive the sheet (75) forward to the print position, its leading edge having been aligned.