Mitsubishi Denki Kabushiki Kaisha

Yousuke Kobayashi

Keiichi Fukazawa

Masahiko Shimizu

Ichiro Furuki

Takaaki Kase

Toshiaki Tohi

An automatic paper feeder comprises: a pick roller for picking out paper accommodated in a paper cassette; a separation roller to which a torque limiter is connected, and which separates the paper picked out by the pick roller to feed the paper one sheet at a time; means for moving the separation roller into contact with or away from the pick roller; a lifter for lifting the paper accommodated in the paper cassette to cause the paper to be moved into contact with or away from the pick roller; and means for driving the lifter. The means for moving the separation roller into contact with or away from the pick roller and the means for driving the lifter are realized by a single driving means.

Automatic paper feeder

A paper feeder comprises a tray having a stage on which papers to be fed are stacked, driving means for driving a platen, transmitting means for transmitting a motive power of the driving means to position the stage at predetermined position for paper feeding operation, and paper feeding means having a roller for feeding the uppermost one of the papers stacked on the stage when the uppermost paper positioned to contact with the feeding roller at the predetermined position by the motive power. It is advantageous that the paper feeder can be made economical and compact since there is no need to provide an exclusive motive power source having a speed reducer. Furthermore, a contact pressure between the paper feeding roller and the paper is stabilized to enhance the accuracy of the paper feeding.

Paper feeder for printer

A paper clamping mechanism for clamping a sheet of printing paper on a drum-shaped platen of a printer is disclosed. The mechanism comprises a clamp member radially slidably mounted at its legs to the end surfaces of the platen, and a lever pivotted to the frame of the printer. The clamp member comprises a pressor which opposes an axial recess on the peripheral surface of the platen; the front end portion of a sheet of paper is held between the pressor and the recess during the printing operation, the clamp member being urged toward the axis of the platen by a spring. The clamp member further comprises an axially extending pin formed on a leg thereof. The lever is urged by a spring to a position at which it is stopped by a pin formed on the frame of the printer. An arm of the lever comes into contact with the pin on the leg of the clamp member when the clamp member is rotated with the platen. When the arm of the lever comes into contact with the pin on the clamp member rotated in the printing direction, the lever turns and yields upon contact; when, on the other hand, the arm comes into contact with the pin on the clamp member rotated in the reverse direction, the pin slides on the arm of the lever which is stopped by the stopper pin, so that the clamp member is raised from the platen to form a gap between the pressor and the recess on the platen.

Growing community of inventors

Hiroshima, Japan

Yousuke Kobayashi