Pfu Limited

Yasuhiro Matsue

Satoshi Sakai

Takumi Nakayama

Mitsuru Shimono

Hironaga Hongawa

Masashi Matsumoto

Hitoshi Asai

Hirohito Mukaiyama

Mitsuhiro Shikan

A first tray is adapted to stack a paper discharged from a discharge port thereon. A lifter is operable to raise or lower the first tray. A detector is operable to detect a stacked state of the paper and the first tray. In a case where the paper is discharged onto the first tray, the first tray is raised or lowered based on the stacked state detected by the detector so as to keep a distance from the discharge port to an uppermost paper of the paper stacked on the first tray within a predetermined range.

Stacker device

It is an object of the present invention to prevent a sheet of continuous-form paper from slackening when it is fed back in a printer capable of feeding both sheets of continuous-form paper and cut-form paper. According to the method for feeding back a sheet of continuous-form paper (,) of the present invention, in a paper feed unit including a pin feed device (,) arranged in an upstream of the continuous-form paper feed passage and also including a friction feed device (,) in which both the pin feed device (,) and the friction feed device (,) feed the sheet of continuous-form paper (,) and a circumferential speed of the friction feed device (,) is a little higher than that of the pin feed device (,), a first amount of feed is set by which the sheet of continuous-form paper is not loosened between the friction feed device (,) and the pin feed device (,) and also a second amount of feed is set which is larger than a difference between an amount of feed of the friction feed device (,) and an amount of feed of the pin feed device (,) when the sheet of continuous-form paper is fed back by the first amount of feed, and the sheet of continuous-form paper is fed back by the first amount of feed when both the friction feed device (,) and the pin feed device (,) are simultaneously reversed, and the friction feed device (,) is normally rotated by the second feed amount under the condition that the pin feed device is stopped. The sheet of continuous-form paper (,) is fed back by repeating the above reverse and the normal rotation.

Paper feed method and apparatus

It is an object of the present invention to prevent a sheet of continuous-form paper from slackening when it is fed back in a printer capable of feeding both sheets of continuous-form paper and cut-form paper. According to the method for feeding back a sheet of continuous-form paper (6) of the present invention, in a paper feed unit including a pin feed device (7) arranged in an upstream of the continuous-form paper feed passage and also including a friction feed device (4, 5) in which both the pin feed device (7) and the friction feed device (4, 5) feed the sheet of continuous-form paper (6) and a circumferential speed of the friction feed device (4, 5) is a little higher than that of the pin feed device (7), a first amount of feed is set by which the sheet of continuous-form paper is not loosened between the friction feed device (4, 5) and the pin feed device (7) and also a second amount of feed is set which is larger than a difference between an amount of feed of the friction feed device (4, 5) and an amount of feed of the pin feed device (7) when the sheet of continuous-form paper is fed back by the first amount of feed, and the sheet of continuous-form paper is fed back by the first amount of feed when both the friction feed device (4, 5) and the pin feed device (7) are simultaneously reversed, and the friction feed device (4, 5) is normally rotated by the second feed amount under the condition that the pin feed device is stopped. The sheet of continuous-form paper (6) is fed back by repeating the above reverse and the normal rotation.

Paper feed method and apparatus for a printer using a main body flap and

Paper feed method and apparatus for a printer

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Kahoku, Japan

Yasuhiro Matsue