Sindoricoh Co., Ltd.

Jae-Heon Chung

Seung-kyoon Noh

A sheet post-processing apparatus comprises a conveyer for conveying the sheets discharged from the image forming system; a conveying device for conveying the sheets discharged from the image forming system; a pair of upper trays for accommodating the sheets conveyed by the conveying devices, and being horizontally moved in order to align the sheets accommodated therein and fall down the aligned sheets; a pair of upper tray driving devices for providing a driving force to the upper trays; a transmission unit for transmitting the driving force of the upper tray driving device to the upper trays; a lower tray for loading the sheets fallen from the upper trays; and a lower tray driving device for moving the lower tray in upper and lower directions in order to retain distance between the upper trays and the lower tray within a predetermined range. Thus, the sheet post-processing apparatus can accommodate variant size sheets by mechanism consisting of simple and cheap elements.

Sheet post-processing apparatus

The present invention provides an apparatus capable of selectively stapling one of opposite corners of the sheets, as well as a side of the sheets. And, the apparatus for moving a stapler to a stapling position comprises a track board having a guide slot, wherein the guide slot includes a longitudinal portion parallel to a side of the sheets and a plurality of slant portions slanted toward the corners of the sheets at ends of the longitudinal portion; a carrying means for fixing the stapler to upper portion thereof, the carrying means being moved along the guide slot and having a plurality of protrusions passing through the guide slot; a guide bar being disposed under the track board in parallel to the longitudinal portion, the guide bar being longer than the longitudinal portion; a driving means for providing a driving force; and a moving means, joined to the driving means, being moved along the guide bar by the driving force, the moving means having a plurality of circular arc-shaped openings for confining the protrusions moving along the longitudinal portion and providing a rotation passage of the protrusions at ends of the longitudinal portion.

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Kyoungki-do, South Korea

Jae-Heon Chung