Abstract: An image forming apparatus includes: an original conveying unit that conveys an original; an original scanning unit that scans the original conveyed by the original conveying unit so as to generate an image of the original; a plotter unit that draws the image on a recording medium; an abnormality detecting unit that detects an abnormality in the plotter unit; and a control unit that, when the abnormality detecting unit detects the abnormality in the plotter unit, shuts off first power supply to the original scanning unit, and sets a first conveying speed of the original by the original conveying unit to be higher than a second conveying speed when the original is scanned by the original scanning unit.

Abstract: An image forming apparatus includes a reading unit reading an original document and generating image data; a power source unit supplying power to the reading unit; a power source switching signal output unit outputting a switching signal for switching between supply and shut-off of the power for any one of an image pickup element and an image processing unit; a measuring unit measuring a power stopping time while the power is shut off; a judging unit determining whether to carry out only a first initial setting when the measured power stopping time is less than a predetermined time and whether to carry out both the first initial setting and a second initial setting when the measured power stopping time is the predetermined time or more; and an initial setting unit carrying out only the first initial setting or the second initial setting also upon the determination by the judging unit.

Abstract: A roll-sheet feeding device having a roll sheet wound in a roll to feed a portion of the roll sheet to an image forming unit, includes a progressive mechanism to transmit a drive force from a drive source to transfer the portion of the roll sheet from the roll in a progressive direction, a roll-sheet drive mechanism to receive the drive force transmitted via the portion of the roll sheet transferred in the progressive direction, a rewinding mechanism to transfer the portion of the roll sheet in a direction opposite to the progressive direction via the roll-sheet drive mechanism to rewind the roll sheet, and a regenerating mechanism to obtain the drive force from the roll-sheet drive mechanism and transmit the obtained drive force to the progressive mechanism to regenerate the transmitted drive force as another drive force in addition to the drive force from the drive source.

Abstract: An image forming apparatus includes: an original conveying unit that conveys an original; an original scanning unit that scans the original conveyed by the original conveying unit so as to generate an image of the original; a plotter unit that draws the image on a recording medium; an abnormality detecting unit that detects an abnormality in the plotter unit; and a control unit that, when the abnormality detecting unit detects the abnormality in the plotter unit, shuts off first power supply to the original scanning unit, and sets a first conveying speed of the original by the original conveying unit to be higher than a second conveying speed when the original is scanned by the original scanning unit.

Abstract: A sheet folding apparatus includes a fan folding unit that fan folds a folded-back sheet into a width or length of the regular size to file the sheet in the regular-size folder such that the sheet forms layers along a traveling direction of the sheet; first and second punching units that punch the filing hole in the sheet fan folded, respectively, into the width and the length of the regular size at the portion to be punched to file the sheet in the regular-size folder; and a sheet-processing setting unit that sets a fold mode of the fan fold and selects one of the first punching unit and the second punching unit for use in punching of the filing hole in the sheet based on a size and orientation of the delivered sheet.

Abstract: An image forming apparatus includes a reading unit reading an original document and generating image data; a power source unit supplying power to the reading unit; a power source switching signal output unit outputting a switching signal for switching between supply and shut-off of the power for any one of an image pickup element and an image processing unit; a measuring unit measuring a power stopping time while the power is shut off; a judging unit determining whether to carry out only a first initial setting when the measured power stopping time is less than a predetermined time and whether to carry out both the first initial setting and a second initial setting when the measured power stopping time is the predetermined time or more; and an initial setting unit carrying out only the first initial setting or the second initial setting also upon the determination by the judging unit.

Abstract: A roll-sheet feeding device having a roll sheet wound in a roll to feed a portion of the roll sheet to an image forming unit, includes a progressive mechanism to transmit a drive force from a drive source to transfer the portion of the roll sheet from the roll in a progressive direction, a roll-sheet drive mechanism to receive the drive force transmitted via the portion of the roll sheet transferred in the progressive direction, a rewinding mechanism to transfer the portion of the roll sheet in a direction opposite to the progressive direction via the roll-sheet drive mechanism to rewind the roll sheet, and a regenerating mechanism to obtain the drive force from the roll-sheet drive mechanism and transmit the obtained drive force to the progressive mechanism to regenerate the transmitted drive force as another drive force in addition to the drive force from the drive source.

Abstract: A paper-sheet punching device punches a hole in a paper sheet. The paper sheet punching device includes a punching unit that receives a paper sheet via an inlet, and punches a hole in the paper sheet; and a return roller that delivers the paper sheet with the hole via an outlet.

Abstract: A sheet folding apparatus includes a fan folding unit that fan folds a folded-back sheet into a width or length of the regular size to file the sheet in the regular-size folder such that the sheet forms layers along a traveling direction of the sheet; first and second punching units that punch the filing hole in the sheet fan folded, respectively, into the width and the length of the regular size at the portion to be punched to file the sheet in the regular-size folder; and a sheet-processing setting unit that sets a fold mode of the fan fold and selects one of the first punching unit and the second punching unit for use in punching of the filing hole in the sheet based on a size and orientation of the delivered sheet.

Abstract: A paper-sheet punching device punches a hole in a paper sheet. The paper sheet punching device includes a punching unit that receives a paper sheet via an inlet, and punches a hole in the paper sheet; and a return roller that delivers the paper sheet with the hole via an outlet.