Abstract: An inkjet printing apparatus that can perform printing with a single printing speed even in a case of being connected with a post-processing apparatus having a different transport speed, and that can suppress increased apparatus costs. A discharge transport portion positioned at a connection side of a post-processing apparatus of the inkjet printing apparatus is constituted by transport roller pairs and discharge roller pairs, and is capable of being driven independently from the inkjet transport portion. When the transport speed of the post-processing apparatus is different from the printing speed, printed papers are temporarily stopped at the discharge transport portion. After this, transport recommences with a predetermined timing matched to the transport speed of the post-processing apparatus, and papers are fed to the post-processing apparatus.

Abstract: A stencil printing apparatus for wrapping a master around an outer circumferential surface of a plate cylinder to perform printing, the stencil printing apparatus being capable of preventing the occurrence of abnormal images or afterimage phenomenon which causes confidential information leakage, without increasing cost or causing any problems. This stencil printing apparatus has time measuring means for measuring a leaving time during which the apparatus is left stand, and when a plate discharge command is output before the leaving time exceeds a first predetermined time while the master is wrapped around the outer circumferential surface, the stencil printing apparatus is shifted to a standby state after the master is discharged from the outer circumferential surface.

Abstract: A printer of the present invention allows a plurality of sheet feeding apparatuses, each having a particular sheet feed speed range adaptive to a plurality of print speeds, to be selectively connected thereto. When any one of the sheet feeding apparatuses is connected to the printer, a controller automatically sets a print speed range on the printer in accordance with print speed range information corresponding to the sheet feeding apparatus.

Abstract: A printing method and a printing apparatus including a stencil printing apparatus and so on. Focusing on the relationship that exists between copy number and master position displacement that occurs during printing, by determining by pretest and setting top-bottom shift correction values in accordance with parameters including copy number that affect printed master position displacement in the direction of rotation of a plate cylinder, and during printing, utilizing conventionally used top-bottom shift means to automatically execute top-bottom shift correction in accordance with the set top-bottom shift correction values, printing position displacement can be prevented from occurring, waste of master and printing medium such as paper can be eliminated and, in addition, the operation time can be shortened and the number of operation steps can be reduced.

Abstract: A duplex printing apparatus capable of printing by performing a slow-up operation on the printing speed so that it increases from a low speed to a set speed at the time of duplex printing. Control means controls, on the basis of a drum rotation position signal and a drum speed signal from a home position sensor and an unshown encoder sensor, a sheet feeding unit, printing unit, sheet discharge unit, sheet re-feeding means and switching member, such that the printing speed (drum speed) slows up from a low speed to a set speed in each rotation of a plate cylinder, which corresponds to feeding of each sheet to the printing unit when duplex printing is started, and further controls a stepping motor of the sheet re-feeding means such that conveyance speed of a sheet receiving board synchronizes with the printing speed.

Abstract: A sheet feeding apparatus includes a sheet stacking section configured to stack a number of sheets, a sheet feeding mechanism configured to feed the sheet stacked on the sheet stacking section one by one, and an intermediate conveying device configured to convey the sheet fed from the sheet feeding mechanism to an image forming apparatus. The intermediate conveying device includes a plurality of sheet conveying devices arranged in an intermediate sheet conveying path at certain intervals to convey the sheet fed from the sheet feeding mechanism, at least one driving device configured to drive each of the plurality of sheet conveying devices, and a plurality of sheet detecting devices arranged in the intermediate sheet conveying path at certain intervals to detect a sheet length by detecting at least one of a leading edge and a trailing edge of the conveyed sheet.

Abstract: A stencil printing apparatus which suppresses master consumption by switching between simplex printing using a simplex master and single-step duplex printing using a duplex master automatically in accordance with master information and sheet information comprises a printing drum and pressing means, and can be made to switch between duplex printing, in which a rear surface printing step is performed after a front surface printing step, and simplex printing by wrapping a duplex master formed with a first engraved image and a second engraved image around the printing drum during duplex printing, and wrapping a simplex master formed with a third engraved image for simplex printing around the printing drum during simplex printing.

Abstract: A paper conveyance apparatus includes a stacking portion; a feeding mechanism to extract and feed paper from the stacking portion one sheet at a time; and an intermediate portion for conveying the fed paper to the vicinity of a feeding port or feeding device of a main body of an image forming apparatus. The intermediate portion includes a plurality of conveyance devices and a plurality of paper detecting devices disposed from the upstream side to the downstream side of a conveyance path. The paper conveyance apparatus further includes a control device for reducing the conveyance speed of the plurality of conveyance devices when the leading edge of the paper is detected by a detecting device disposed at least one device further toward the upstream side than a paper detecting device disposed furthest downstream of the plurality of detecting devices.

Abstract: An inkjet printing apparatus that can perform printing with a single printing speed even in a case of being connected with a post-processing apparatus having a different transport speed, and that can suppress increased apparatus costs. A discharge transport portion positioned at a connection side of a post-processing apparatus of the inkjet printing apparatus is constituted by transport roller pairs and discharge roller pairs, and is capable of being driven independently from the inkjet transport portion. When the transport speed of the post-processing apparatus is different from the printing speed, printed papers are temporarily stopped at the discharge transport portion. After this, transport recommences with a predetermined timing matched to the transport speed of the post-processing apparatus, and papers are fed to the post-processing apparatus.

Abstract: The invention provides an option-type paper feeding device that can contribute to enhancing printing operation efficiency while taking advantage of variable printing speed in a printing apparatus. A high-volume paper feeding device includes: a paper stacking section; a paper feeding mechanism; and an intermediate transport section connected to a paper feeding section of a printing apparatus such as a stencil printing apparatus. The intermediate transport section includes: a first paper transport means; and a second paper transport means provided downstream of the first paper transport means, and an inkjet printing section is provided above the first paper transport means. The transport speed of the first paper transport means is fixed to a speed suitable for printing by the inkjet printing section, while the transport speed of the second paper transport means is variable.

Abstract: A stencil printing apparatus for wrapping a master around an outer circumferential surface of a plate cylinder to perform printing, the stencil printing apparatus being capable of preventing the occurrence of abnormal images or afterimage phenomenon which causes confidential information leakage, without increasing cost or causing any problems. This stencil printing apparatus has time measuring means for measuring a leaving time during which the apparatus is left stand, and when a plate discharge command is output before the leaving time exceeds a first predetermined time while the master is wrapped around the outer circumferential surface, the stencil printing apparatus is shifted to a standby state after the master is discharged from the outer circumferential surface.

Abstract: A printing method and a printing apparatus including a stencil printing apparatus and so on. Focusing on the relationship that exists between copy number and master position displacement that occurs during printing, by determining by pretest and setting top-bottom shift correction values in accordance with parameters including copy number that affect printed master position displacement in the direction of rotation of a plate cylinder, and during printing, utilizing conventionally used top-bottom shift means to automatically execute top-bottom shift correction in accordance with the set top-bottom shift correction values, printing position displacement can be prevented from occurring, waste of master and printing medium such as paper can be eliminated and, in addition, the operation time can be shortened and the number of operation steps can be reduced.

Abstract: A duplex printing apparatus capable of printing by performing a slow-up operation on the printing speed so that it increases from a low speed to a set speed at the time of duplex printing. Control means controls, on the basis of a drum rotation position signal and a drum speed signal from a home position sensor and an unshown encoder sensor, a sheet feeding unit, printing unit, sheet discharge unit, sheet re-feeding means and switching member, such that the printing speed (drum speed) slows up from a low speed to a set speed in each rotation of a plate cylinder, which corresponds to feeding of each sheet to the printing unit when duplex printing is started, and further controls a stepping motor of the sheet re-feeding means such that conveyance speed of a sheet receiving board synchronizes with the printing speed.

Abstract: A stencil printer includes at least an upstream and a downstream printing section, as seen in the direction of sheet conveyance, each including a print drum and a press roller for pressing a sheet against the print drum. An intermediate conveyor, positioned between the upstream and downstream printing sections, conveys the sheet from the former toward the latter. A dual master, formed with a first and a second image, is wrapped round the print drum of the upstream printing section. This printing section includes a refeeding device, a path selector, and a switching device.

Abstract: Provided is a bulk paper feeding device with an intermediate conveyor comprising a carrier capable of carrying a large quantity of paper, a paper feeding mechanism for picking up and feeding one sheet at a time of the paper from the carrier, and an intermediate conveyor for transporting a sheet of paper fed from the feeding mechanism to the main paper feeding table of the paper feeder on the body of the image forming device or to the vicinity of a paper feeding port that faces the main paper feeding means of the paper feeder.

Abstract: A stencil printing apparatus which suppresses master consumption by switching between simplex printing using a simplex master and single-step duplex printing using a duplex master automatically in accordance with master information and sheet information comprises a printing drum and pressing means, and can be made to switch between duplex printing, in which a rear surface printing step is performed after a front surface printing step, and simplex printing by wrapping a duplex master formed with a first engraved image and a second engraved image around the printing drum during duplex printing, and wrapping a simplex master formed with a third engraved image for simplex printing around the printing drum during simplex printing.

Abstract: A stencil printer of the present invention includes at least an upstream and a downstream printing section, as seen in the direction of sheet conveyance, each including a print drum and a press roller for pressing a sheet against the print drum. An intermediate conveyor, positioned between the upstream and downstream printing sections, conveys the sheet from the former toward the latter. A dual master, formed with a first and a second image, is wrapped round the print drum of the upstream printing section.

Abstract: A duplex printing device including a duplex printing master on which two images are perforated in series over a single plate, and a simplex printing master on which a third image is perforated over the single plate. Either master is wrapped around an outer peripheral surface of a print drum, enabling duplex printing operation in which one of the two images is printed by pressing a front side of a sheet against the duplex printing master on the print drum using a presser which can be brought into and out of contact with the print drum, after which the other image is printed by reversing and refeeding the sheet and pressing a reverse side of the sheet against the duplex printing master on the print drum using the presser, and a simplex printing operation done by pressing one side of the sheet against the simplex printing master.

Abstract: A printer of the present invention allows a plurality of sheet feeding apparatuses, each having a particular sheet feed speed range adaptive to a plurality of print speeds, to be selectively connected thereto. When any one of the sheet feeding apparatuses is connected to the printer, a controller automatically sets a print speed range on the printer in accordance with print speed range information corresponding to the sheet feeding apparatus.

Abstract: A duplex printing device comprises a duplex printing master on which a first image and a second image are perforated in series over the length of a single plate, and a simplex printing master on which a third image having an image area equivalent to the first image and the second image is perforated over the length of a single plate.