Abstract: A sheet processor including a processing tray for loading thereon sheets transported from a body of an image forming apparatus, an edge aligning unit for aligning edges of the sheets loaded on the processing tray, a batch transporting device for transporting the sheets aligned on the processing tray from the processing tray in a batch, a stack tray for stacking thereon the sheets transported from the batch transporting device, and a driving unit for raising and lowering the stack tray. The sheet processor is mounted within a sheet-discharge section formed in a space in the image forming apparatus. An image reading device is disposed above the sheet-discharge section, and the sheet processor is removably mounted in a space between the reading device and a sheet-discharge tray of the sheet-discharge section.

Abstract: In a sheet folding apparatus for nipping and conveying a sheet by a pair of folding rollers and folding the sheet, at least one roller of the pair of folding rollers has large- and small-diameter portions along the axis. The contact area between the sheet and each folding roller can be reduced. As a result, a relief for the pressure from the two ends of the roller shaft in folding a sheet can be ensured at a portion where the sheet creases, and any crease can be prevented.

Abstract: A sheet treating apparatus including a sheet discharging device for discharging a sheet, a first stacking tray for receiving the sheets discharged by the sheet discharging device, an aligning device for aligning a sheet bundle on the first stacking tray by a pinching movement effected by a first and second aligning members shiftable independently in a direction perpendicular to a sheet discharging direction, and a transferring device for transferring the sheet bundle on the first stacking tray to a second stacking tray, wherein, in the first stacking tray, alignment positions of the respective sheet bundles are offset by shifting the alignment positions by a predetermined amount to first and second aligning positions alternately by the first and second aligning members, and wherein the first and second aligning positions of the first stacking tray are opposite directions transverse to the sheet discharging direction with respect to the position of the sheet discharged.

Abstract: A sheet processing apparatus has a first stacker for stacking discharged sheets; a feeder for feeding a set of sheets from the first stacker; and second stacker for stacking the set of sheets fed by the feeder. A shifting device shifts the sheets stacked on the first stacker and; a controller groups the sheets in a set into a plurality of groups of sheets, and stacks, shifts and feeds the sheets, for each group, to the first stacker, and stacks the set of sheets on the second stacker.

Abstract: A sheet sorting apparatus includes a plurality of trays for accommodating sheets; a helical cam device, engageable with a cam follower for moving the plurality of trays; a cam driving device for driving the helical cam device; a sheet set processing device movable between processing position and a retracted position where the processing device doe snot interfere with the plurality of trays; a reversible driving device for advancing or retracting the sheet set processing device; and a controlling device for controlling the driving device; wherein a cam surface of the helical cam is constituted of substantially horizontal portions and slanted portions; and the cam driving device and the driving device are controlled by the controlling device, in such a manner that the sheet set processing device starts to enter a processing position when the cam follower shifts from the slanted portions to the horizontal portions, and the entering operation ends by the time the cam follower reaches the middle portion of the hor

Abstract: A sheet post-processing apparatus includes a plurality of bin trays arranged in multiple levels with predetermined intervals; stacking device supported in said apparatus so as to be moved in an arrangement direction of the plurality of bins; discharging device for discharging a sheet; and transferring device for transferring the sheet to said stacking device from the bin tray having completed sheet reception.

Abstract: A sheet post-processing apparatus includes a plurality of bin trays arranged in multiple levels with predetermined intervals; stacking device supported in said apparatus so as to be moved in an arrangement direction of said plurality of bins; discharging device for discharging a sheet; and transferring device for transferring the sheet to said stacking device from said bin tray having completed sheet reception.

Abstract: An electrophotographic photosensitive member having a high sensitivity to long-wavelength light as emitted by a semiconductor laser and causing little change in potential change during repetitive use is formed by using as a charge-generating material a hydroxygallium phthalocyanine having a crystal form characterized by a strongest peak at a Bragg angle (2.theta..+-.0.2 deg.) of 28.1 deg. in a CuK.sub..alpha. characteristic X-ray diffraction pattern. The hydroxygallium phthalocyanine may preferably be produced through a process including treating a halogenated gallium phthalocyanine for conversion into a hydrous hydroxygallium phthalocyanine, freeze-drying the hydrous hydroxygallium phthalocyanine into a low-crystallinity hydroxygallium phthalocyanine, and milling the low-crystallinity hydroxygallium phthalocyanine.

Abstract: A sheet binding apparatus includes at least one bin tray for accommodating sheets; at least one binding device for binding a set of sheets in the bin; a first sheet moving device for moving the sheet sets in the bin tray; and a second sheet moving device for moving the sheets sets in the bin tray in a direction crossing with the direction of movement by the first sheet moving device; wherein the bin is provided with a sheet stopper, to which the trailing edge of the sheet is abutted, and at least one cut-away portion for accommodating the binding device when the binding device operates, and wherein an upstream corner of the sheet set moved by the second moving device is opposed to a region other than the cut-away portion.

Abstract: A sheet transport apparatus has a puncher for punching a hole in a sheet as the sheet is being transported through a transport path, and a transport device for clamping and transporting the sheet, the transport device being disposed downstream of the puncher and having a first rotation member and a second rotation member for pressing the sheet into contact with the first rotation member, the transport device being disposed at a position where a hole punched by the puncher passes through.

Abstract: A sheet post-processing apparatus includes at least one sheet receiving bin for receiving sheets. A sheet discharger discharges sheets into the sheet receiving bins and a post-processor post-processes the sheets stored in the sheet receiving bins. A support supports the sheet discharger, for movement between a first location at a discharging location for discharging the sheets into the sheet receiving bins and a second location at a retracted position away from the first location. A moving device moves the sheet discharging means from the first location to the second location when relative movement is imparted between the sheets and the post-processor so that the post-processor is activated at a predetermined location along the edges of the sheets in the sheet receiving bins.

Abstract: A sheet processing apparatus includes a first sheet feeder for feeding a first sheet; a second sheet feeder for feeding a second sheet for discrimination; a sheet sticking device for sticking the second sheet fed from said second sheet feeder on the first sheet in the first sheet feeder such that a part of the second sheet is partly extended out of the first sheet.

Abstract: A sheet post-processing apparatus includes at least one sheet receiving tray for accommodating sheets; a sheet discharger for discharging sheet to the sheet receiving tray; a sheet moving mechanism for moving the sheets on the sheet receiving tray inclinedly toward a front side of the apparatus.

Abstract: An image fixing apparatus which includes a rotatable member for fixing an image, a plurality of separation members for contacting the rotatable member, and a mechanism for shifting the contactable member in a direction of a generating line of the rotatable member so as to engage and disengage the separation members from the rotatable member. The shifting of the separation members is timed so that they are separated from the rotatable member a line period shorter than that required for fused toner on the separation member to solidify.

Abstract: The present invention provides a sheet post-treatment apparatus comprising a sheet bundle convey unit including at least one sheet receiving tray unit capable of accommodating a sheet, a convey unit for conveying the sheet on the sheet receiving tray unit, and a sheet stacking tray for receiving the sheet and for stacking the sheets thereon. Apparatus includes a hold member capable of shifting between a first position where the hold member is overlapped with a stacking surface of the sheet stacking tray above the stacking surface, and a second position where the hold member is retracted from the stacking surface. When the sheet is conveyed to the stacking surface, the hold member supports a rear end portion of the sheet at the first position, and the hold member is shifted to the second position at a predetermined timing to drop a rear end portion of the sheet, thereby stacking the sheets.

Abstract: A sheet post processing apparatus includes at least one sheet accommodating device for accommodating sheets; a sheet discharging device for discharging sheets to the sheet accommodating device; a transfer device for transferring a set of sheets on the sheet accommodating device to a sheet take-out position; and a manual control device for operating the transfer device.

Abstract: A sorting apparatus includes a plurality of bin trays arranged in a direction with clearances between adjacent ones to accommodate sheet materials: at least one sheet holder, movable in the direction, for holding and and discharging the sheet materials to the bin trays; a binding device for binding the sheet materials on the bin trays; wherein the binding device is movable in a first direction substantially parallel with the direction, and is movable in a second direction substantially perpendicular to the first direction between a first position for binding the sheet materials on a bin tray and a second position outside a moving path of the holder.

Abstract: A sheet post processing apparatus includes a plurality of movable a post-processing device for effecting a predetermined post-processing for a set of sheets; malfunction detector for detecting malfunction for each of the post-processing device; a controller, responsive to the malfunction detector, for controlling the post-processing device to place, at a position where the post-processing device is to be placed if the malfunction did not occur, another one of the post-processing device free of the malfunction.

Abstract: A sheet post-processing apparatus includes at least one tray for stacking discharged sheets; a stacker, disposed adjacent to the tray, for receiving a set of sheets from the tray; a controller operable in one of a first mode in which the set of sheets is transferred to the stacker and a second mode in which the set of sheets remains on the tray; and a retractor for retracting the stacker by relative movement between the tray and the stacker when the second mode is selected.

Abstract: A sheet treating apparatus including a sheet discharging device for discharging a sheet, a first stacking tray for receiving the sheets discharged by the sheet discharging device, an aligning device for aligning a sheet bundle on the first stacking tray by a pinching movement effected by a first and second aligning members shiftable independently in a direction perpendicular to a sheet discharging direction, and a transferring device for transferring the sheet bundle on the first stacking tray to a second stacking tray, wherein, in the first stacking tray, alignment positions of the respective sheet bundles are offset by shifting the alignment positions by a predetermined amount to first and second aligning positions alternately by the first and second aligning members, and wherein the first and second aligning positions of the first stacking tray are opposite directions transverse to the sheet discharging direction with respect to the position of the sheet discharged.