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US 6,273,416 B1Granted
Sheet feeding unit and method, and image reader
AssigneeFujitsu Limited
InventorsHirotake Watanabe, Tamio Amagai
Life of this patent
Estimating the term…
Abstract
The present invention has an object to provide a sheet feeding device and method, and image reader which facilitate setting of a sheet pile, serve to separate and feed a sheet succesfully. The present invention provides a separation gate between draw and separation rollers for achieving a multistage separation. The separation gate is made movable in synchronization with the draw roller so as to maintain a certain separation condition, despite of the draw roller that may descend according to the number of piled sheets.
Claims16
A sheet feeder comprising:
- a draw roller movably provided so that said draw roller may contact an uppermost sheet in plural sheets, and feeding one sheet or more including the uppermost sheet;
- a separation gate provided downstream relative to said draw roller in a sheet feed direction, said separation gate restricting the number of sheets fed by said draw roller;
- and
- a transmission mechanism which moves said separation gate in synchronization with a movement of said draw roller.
1 more element
A sheet feeder comprising:
- a draw roller movably provided so that said draw roller may contact an uppermost sheet in a pile of sheets, and feeding one sheet or more including the uppermost sheet;
- and
- a separation gate provided downstream relative to said draw roller in a sheet feed direction, and aligning an edge of the pile with a direction approximately perpendicular to the sheet feed direction.
A sheet feeder comprising:
- a draw roller provided movably up-and-down so that said draw roller may contact an uppermost sheet in plural sheets, and feeding one sheet or more including the uppermost sheet;
- a separation roller which separates the uppermost sheet from those fed by said draw roller and feeds the uppermost sheet;
- a separation pad which cooperates with said separation roller;
- and
- a guide part which contacts the sheet fed by said separation roller, and maintains an approach angle of the sheet to said separation roller.
2 more elements
A sheet feeder comprising:
- a draw roller provided movably up-and-down so that said draw roller may contact an uppermost sheet in plural sheets, and feeding one sheet or more including the uppermost sheet;
- a separation roller which separates the uppermost sheet from those fed by said draw roller, and feeds the uppermost sheet;
- a separation pad which cooperates with said separation roller;
- and
- a separation gate provided between said draw roller and said separation roller, and restricting the number of sheets fed by said draw roller feeds to said separation roller.
2 more elements
A sheet feeding method comprising the steps of:
- sequentially feeding one or more sheets from a top of piled sheets placed on a table using a draw roller;
- restricting, using a separating gate, the number of sheets to be fed;
- adjusting a relative configuration between the separation gate and the draw roller;
- and
- separating using a separation pad and a separation roller, a sheet out of those fed through the separation gate.
2 more elements
An image reader comprising:
- a sheet feeder;
- and
- a reading part which reads out a sheet fed by said sheet feeder,
- wherein said sheet feeder comprises:
- a draw roller movably provided so that said draw roller may contact an uppermost sheet in plural sheets, and feeding one sheet or more including the uppermost sheet;
- a separation gate provided downstream relative to said draw roller in a sheet feed direction, and movable according to a movement of said draw roller, said separation gate restricting the number of sheets fed by said draw roller;
- and
- a transmission mechanism which moves said separation gate in synchronization with a movement of said draw roller.
5 more elements
An image reader comprising
- a sheet feeder;
- and
- a reading part which reads out a sheet fed by said sheet feeder,
- wherein said sheet feeder comprises:
- a draw roller movably provided so that said draw roller may contact an uppermost sheet in plural sheets, and feeding one sheet or more including the uppermost sheet;
- and
- a separation gate provided downstream relative to said draw roller in a sheet feed direction and aligning an edge of the pile with a direction approximately perpendicular to the sheet feed direction.
4 more elements
An image reader comprising:
- a sheet feeder;
- and
- a reading part which reads out a sheet fed by said sheet feeder,
- wherein said sheet feeder comprises:
- a draw roller provided movably up-and-down so that said draw roller may contact an uppermost sheet in plural sheets, and feeding one sheet or more including the uppermost sheet;
- a separation roller which separates the uppermost sheet from those fed by said draw roller and feeds the uppermost sheet;
- a separation pad which cooperates with said separation roller;
- and
- a guide part which contacts the sheet fed by said separation roller and maintains an approach angle of the sheet to said separation roller.
6 more elements
An image reader comprising:
- a sheet feeder;
- and
- a reading part which reads out a sheet fed by said sheet feeder,
- wherein said sheet feeder comprises:
- a draw roller provided movably up-and-down so that said draw roller may contact an uppermost sheet in plural sheets, and feeding one sheet or more including the uppermost sheet;
- a separation roller which separates the uppermost sheet from those fed by said draw roller and feeds the uppermost sheet;
- a separation pad which cooperates with said separation roller;
- and
- a separation date provided between said draw roller and said separation roller, and restricting the number of sheets fed by said draw roller feeds to said separation roller.
6 more elements
Dependencies are inferred from the claim text.