Paper feed device for a recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorHirofumi Hirano
Life of this patent
Estimating the term…
Abstract
A paper feed device for a recording apparatus includes means for containing a plurality of sheets therein, supply means for feeding the sheets from the containing means, conveyor means for feeding the sheets fed by the supply means in the paper feeding direction and in the opposite direction so as to pass through a recording station, a reversible motor for commonly driving the supply means and the conveyor means, means for driving the conveyor means in the paper feeding direction by forward rotation of the motor, driving the conveyor means in the opposite direction by reverse rotation of the motor and driving the supply means, and means for selectively inhibiting the operation of the supply means during the reverse rotation of the motor.
Claims12
A paper feed device for a recording apparatus, comprising:
- means for containing a plurality of sheets therein;
- supply means for feeding the sheets from said containing means, said supply means having a feed roller having a convex portion on a peripheral surface thereof to feed the sheets;
- conveyor means for feeding the sheets fed by said supply means in the paper feeding direction and in a direction opposite to the paper feeding direction so as to pass through a recording station;
- a reversible motor for commonly driving said supply means and said conveyor means;
- control means for feeding the sheets by reverse rotation of said motor while gripping the sheets by the convex portion of said supply means, forming a loop by causing the sheets to strike against said conveyor means, separating the convex portion of said feed roller from the sheets to thereby release the sheets from their gripped state and driving said conveyor means in the paper feeding direction by normal rotation of said motor;
- and
- stopping means for stopping said feed roller in a state so as to separate the convex portion away from the sheets when said conveyor means feeds the sheet in the paper feeding direction and in the direction opposite to the paper feeding direction.
A paper feed control method wherein a sheet is fed by supply means and convey means from sheet containing means to a recording apparatus, comprising the steps of:
- supplying the sheet from the sheet containing means by gripping the sheet by a convex portion on a peripheral surface of said supply means rotated normally by a motor which is rotated reversely;
- forming a loop by causing the sheet fed by said supply means to strike against the convey means;
- stopping the supply means using stopping means for stopping the supply means by releasing the sheet on the containing means from being gripped by the convex portion of said supply means;
- conveying the sheet in the paper feeding direction when the convey means is transmitted a normal rotation from the motor while the supply means is stopped by the stopping means;
- and
- conveying the sheet in a direction opposite to the paper feeding direction when the convey means is transmitted a reverse rotation from the motor while the supply means is stopped by the stopping means.
Dependencies are inferred from the claim text.