Sheet feeding mechanism for printing apparatus
AssigneeSeiko Epson Corporation
InventorsKenjiro Murakami, Keiichi Ohshima
Life of this patent
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Abstract
A sheet feeding mechanism for a printing apparatus capable of achieving accurate sheet feed performance free from slanted sheet feeding, dislocation between pages in printing on copy sheets, out-of-pitch printing, and the like. The sheet feeding mechanism includes a pair of confronting roller units capable not only of applying a driving-like sheet feed force to both front and back surfaces of a copy sheet, but also of maintaining a constant pressure contact force from each roller. The shafts of the pair of confronting roller units are driven so that the sheet feed force is stable. The pressure contact force is produced by a structure wherein each roller is biased by independent loading.
Claims7
A sheet feeding mechanism for a printing apparatus, comprising:
- a first drive shaft;
- a first roller unit including a plurality of rollers which rotate integrally with said first drive shaft;
- a second drive shaft;
- a second roller unit having rollers mounted on said second drive shaft and constrained to rotate integrally with said second drive shaft while in pressure contact with said plurality of rollers in said first roller unit, said second roller unit confronting said first roller unit;
- and a plurality of independent loading means, each of said rollers in said second roller unit receiving a load applied by a respective one of said independent loading means so that each of said confronting rollers receives a pressure contact force therefrom.
Dependencies are inferred from the claim text.