Konica Corporation

Hirohiko Okabe

Minoru Kawano

Toshitaka Matsumoto

Hirotaka Kataoka

Hitoshi Tamura

Masato Hattori

Masaru Ohtsuka

Hiroto Ito

Tsuyoshi Tsuchiya

Kohji Yoshie

Shigemi Yukizane

Masaaki Sekiguchi

Tadahiro Takahashi

Katsunori Takahashi

Masanobu Kawano

Nobutaka Kato

Makoto Tamura

Kimitaka Yanai

Yoshiyuki Kikuiri

Shinji Yashiro

A sheet finisher includes a conveyance member which conveys a sheet to an ejection direction, a sheet ejection section having paired rollers for ejecting the conveyed sheet by nipping the sheet by the paired rollers, and a control section for controlling the conveyance member and the sheet ejection section to separate the paired rollers from each other when conveying the sheet. After a front end portion of the sheet in the ejection direction passes a nipping position of the paired rollers, the control section makes the paired rollers press-contact with each other, nip and reconvey the sheet, and eject the sheet out of the finisher. The control section further controls the conveyance member and the sheet ejection section to temporarily release the press-contact of the paired rollers during reconveyance of the sheet to remove a sag from the sheet to then make the paired rollers press-contact with each other again, and to eject the sheet out of the finisher by nipping the sheet.

Sheet finisher with ejection roller control

A sheet finishing method in which a sheet delivered from an image forming apparatus main body is conveyed and stacked on a sheet placement table, and the stacked sheets are positioned and aligned, and then folded by a folding means composed of a paired folding rollers and a folding plate. The sheet finishing method is controlled such that a rotation motion of the paired folding rollers is switched between a state to be rotated along with an advancing motion of the folding plate and a state to be stopped in accordance with the number of sheets stacked on the sheet placement table.

Sheet finishing method, sheet finisher and image forming apparatus for use therewith

A sheet cutter for finishing a booklet by cutting, with a cutter, edges of a bundle of sheets folded double, wherein it is possible to load booklets on a booklet stand of a booklet storing section that stores a plurality of booklets which have been subjected to cutting processing, by overlapping sheet faces, with a folded portion of each booklet facing upward.

Sheet cutting device and image forming apparatus equipped therewith

A finisher includes: a conveyor for conveying sheets; an intermediate stacker on which conveyed sheets are stacked; a stapler for stapling a stacked package of sheets; a sheet delivery device for delivering the stapled package of sheets; an up-and-down sheet exit tray on which the delivered package of sheets is stacked and which can move up and down; a driving device for driving the up-and-down sheet exit tray; an upper limit detector for detecting an upper limit position of a surface of the stapled package of sheets which is stacked on the up-and-down sheet exit tray; and a controller for controlling the driving device, wherein when a mode to staple a package of sheets which is not larger than a predetermined size and not larger than a predetermined number of sheets, is set, the controller temporarily withdraws the up-and-down sheet exit tray from the upper limit to a lower position before the stapled package of sheets has been delivered onto the up-and-down sheet exit tray; and when the sheet delivery device stops, the controller controls the driving device in such a manner that the up-and-down sheet exit tray is moved upward, and stopped at the upper limit position.

Finisher and image forming apparatus therewith

The present invention relates to a sheet finisher, which receives sheets from an image forming apparatus, such as an electro-photographic copying machine, a printer, a facsimile, etc., to align and bind the sheets. There is described a sheet finisher which includes a conveyance roller pair to convey the sheets, an intermediate stacker to stack the sheets, an aligning device to align the sheets stacked on the intermediate stacker, a binder to bind the sheets stacked and aligned on the intermediate stacker, an ejector to convey and eject the sheets bound by the binder, a driver to drive the aligning device, a controller to control the driver and an overlapped sheets conveying device to grip and convey two sheets. In the sheet finisher, the controller controls the driver in a manner such that the aligning device aligns an initial one sheet stacked on the intermediate stacker under a first aligning condition, while the aligning device aligns two overlapped sheets under a second aligning condition.

Sheet finisher, image forming apparatus, and sheet conveyance apparatus

A sheet feeding apparatus for picking up, aligning, and feeding single sheets from a stack of a plurality of such sheets. The apparatus includes a driving means for the pick up, separator, and sheet feeder having a driving motor with a coupling in the drive path which is capable of providing a delay period between forward and backward rotations of the motor. There is a torque regulator between the coupling and a reverse roller which interrupts the driving force for a predetermined time. The apparatus also includes a control which stops the registration rollers while the single sheet collides with the circumferential surfaces thereof for alignment and, upon reversal of the driving motor, the sheet is fed while the reverse roller first stops for the predetermined time and then rotates in a direction opposite to the direction of feeding. Thus, the single sheets are aligned and double feeding is prevented.

Document sheet feeding apparatus

In a sheet finisher for use with an image forming apparatus, for receiving and aligning sheets discharged from the image forming apparatus, for then stapling the sheets together and for ejecting the stapled sheets to an exit tray, the sheet finisher includes: an intermediate stacker for receiving, aligning and stapling sheets discharged from the image forming apparatus; a conveyor for superimposing a first sheet and a second sheet in a sheet conveyance path upstream of the intermediate stacker, and then for conveying the superimposed sheets to the intermediate stacker to form a succeeding set of sheets to be stapled which follows a preceding set of sheets to be stapled in the intermediate stacker; a driver for driving the conveyor; and a controller for controlling the driver with respect to an operation timing of the driver.

Sheet finisher

An apparatus for sorting sheets on a tray in which a stacking position of sheets is changed for each set number of sheets to one of different stacking positions on the tray, includes a movable pressing member coming in contact with a discharging roller on its low position so that a discharging speed of the sheet is reduced, a movable lower guide plate so that the lower guide plate is positioned lower than a upper portion of the discharging roller on its low position; a sensor to detect a passage of a sheet; and a driving device to move the lower guide plate and the pressing member in response to a signal from the sensor.

Sheet sorting apparatus

A sheet finishing apparatus for finishing sheets ejected from an image forming apparatus, which has a sheet conveyor, a stacker, a sheet stopper at a lower end of the stacker, a movable alignment plate on at least one side edge position of the sheets. The apparatus further includes a driver for driving the movable alignment plate, a stapler. The apparatus is provided with a controller for controlling the driver such that the movable alignment plate is moved to a first position to receive the sheets, at which the plate is located outside one edge of a width direction of the sheets by a predetermined distance, when the sheets are conveyed onto the stacker from the sheet conveyor; the plate is moved to a second position to align the width direction of a first sheet of a plurality of successive sheets, at which the plate is located closer to the one edge of the sheets than the first position, when the first sheet advances on the stacker toward the sheet stopper; and the plate is moved to a third position to push the one edge of the sheets for alignment after a second and later sheets collide with the sheet stopper.

Sheet finishing apparatus

A recording sheet finisher in use with an image forming apparatus such as a copier. The recording sheet finisher includes a stacker for stacking recording sheets, an aligning member for aligning the bundle of the recording sheets on the stacker, a counter for counting a number of the recording sheets bundled on the stacker, and a controller for controlling the aligning member so that the aligning member aligns the bundle of recording sheets after a first predetermined time period after the last one of the recording sheets is conveyed onto the other ones when the number of recording sheets bundled on the stacker is 25 or more, and aligns the bundle after a second predetermined time period when the number is not less than 25.

Growing community of inventors

Tokorozawa, Japan

Hirohiko Okabe