Sheet feeding or delivering – Feeding – With means to align sheet
Patent
1988-11-15
1990-07-17
Huppert, Michael S.
Sheet feeding or delivering
Feeding
With means to align sheet
271229, 271266, 271272, B65H 900
Patent
active
049416553
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.
REFERENCES:
patent: 3980295 (1976-09-01), Kleid
patent: 4420153 (1983-12-01), Winkler et al.
patent: 4474365 (1984-10-01), DiBlasio
patent: 4660822 (1987-04-01), Winkler et al.
patent: 4779861 (1988-10-01), Ozawa et al.
Bollinger David H.
Brandt, Inc.
Huppert Michael S.
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