Omron Corporation

Koji Kirino

Takahiro Ono

Masaaki Sumi

Takeshi Kakinuma

Takeshi Katoh

Norikazu Kawai

A device for reversing the direction of motion of a paper sheet has a passage for guiding the paper sheet inside and includes a plurality of rollers each having a specified function. A first roller serves as a driver roller, its rotation causing the paper sheet to be transported into and out of the passage. A second roller is for contacting and rotating with the first roller and thereby transporting the paper sheet in the first direction into the passage. A third roller is disposed on the opposite side of the first roller from the second roller and serves to transport the paper sheet in the second direction out of the passage by contacting and rotating with the first roller. A fourth roller is another driver roller and is disposed in the passage. It allows the front edge of the paper sheet to pass by when it is transported in the first direction by means of the first and second rollers. When the paper sheet has passed between the first and second rollers and its back edge has been disengaged from them, a guiding member pushes and guides the back edge of the paper sheet towards the third roller and the four roller rotates so as to transport the paper sheet in the second direction out of the device.

Device for reversing direction of motion of paper sheet

This invention relates to a sheet post-processing device and an image-forming device. The mechanism that arranges sheets to be a bundle and that discharges the bundle will be reduced in size and cost. A sheet S guided by the guide is conveyed to a tray by a discharging roller . When the rear end &agr; of the sheet S locates on a arranging table , the discharging roller rotates in the opposite direction, and the sheet is conveyed until the sheet contacts the stopper of the arranging table . The next sheet S is conveyed to the tray in the same manner as previous described, however the previous sheet S is held on the arranging table by the holding device . The sheet S contacts the stopper by the reverse rotation of the discharging roller to be arranged on the sheet S . A bundle of sheets bound by a stapler is discharged to the tray completely by the discharging roller

Sheet post-processing device and image-forming device

A binding apparatus has a switching flapper switching a feed path for feeding papers to either an upper discharge port or a lower discharge port, a discharge roller provided on the upper discharge port, and a shutter , a stapler and a discharge roller provided on the lower discharge port. The discharge roller can feed the papers in a direction opposite to a general paper feed direction, and the shutter stops the papers on a specified position and positions the same when the papers are fed in the opposite direction. The stapler staples the positioned papers. The discharge roller presses the papers against the shutter , registers the papers, and discharges the papers in the general paper feed direction after the papers are stapled. Consequently, a miniature paper binding apparatus having a simple structure can be provided.

Binding apparatus

A sheet inversion device for inverting a sheet that is fed in and for feeding out the inverted sheet has intermediate rollers, feed-in rollers, feed-out rollers, inversion rollers, and pressing guide members. The feed-in rollers are positioned on one side of the intermediate rollers to feed a sheet. The feed-out rollers are located on the other side of the intermediate rollers to feed the sheet. The inversion rollers are located to the rear in the feed-in direction upon the receipt of the force produced by the advance of a sheet slip across the sheet while rotating in the feed-out direction. The pressing guide members exert, with the inversion rollers, a sheet pressing force to counter the force transmitted by the sheet. In the sheet inversion device, the pressing faces of the pressing guide members have the same arced shape as have the outer circumferential faces of the inversion rollers.

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Kyoto, Japan

Koji Kirino