Abstract: A stencil printer operable in a duplex print mode of the present invention prints an image on one side of a sheet and then prints another image on the other side of the same sheet. The printer includes at least one print drum and at least one press roller facing the print drum for pressing the sheet against the print drum. When the press roller is used to press the other side of the sheet against the print drum, the press roller is implemented as an elastic body provided with a fluorine compound layer on the surface thereof.

Abstract: A printer of the present invention includes a timing belt passed over drive pulleys, each of which is mounted on a particular print drum, via phase adjusting means and deflection pulleys or rotary members. The deflection pulleys are rotatable in contact with the rear surface of the timing belt. The timing belt has its rear surface ground to have uniform thickness. The printer is free from the deviation of relative phase between the rotary members and offset ghosts ascribable to the irregular thickness of the timing belt, while preserving the low-cost configuration of timing belt connection.

Abstract: A stencil printer of the present invention includes a printer body, a print drum rotatably mounted on the printer body, a press roller for pressing a sheet against the circumferential surface of the print drum, and a moving device for selectively moving the press roller into or out of contact with the outer circumference of the print drum. The press roller and moving device are capable of being pulled out from the printer body integrally with each other.

Abstract: A printer of the present invention includes a print drum around which a master made by cutting a stencil is to be wrapped, an ink feeding device for feeding ink to the master wrapped around the print drum and a pressing member for pressing a sheet relatively to the print drum to thereby print an image on the sheet. The operator of the printer is capable of selecting either one of a usual print mode and a silence print mode that give priority to image quality and noise reduction, respectively.

Abstract: A thermosensitive stencil paper having a thermoplastic resin film and a porous resin layer which is provided on the thermoplastic resin film by coating a porous resin layer formation coating liquid including a water-in-oil emulsion of a resin on the thermoplastic resin film and drying the coating liquid. In addition, the method of producing the above-mentioned thermosensitive stencil paper is also disclosed.

Abstract: To provide a highly human- and environment-friendly ink fixing method that is excellent in energy efficiency, operability and ink-fixing property and has a simple process, an ink fixing apparatus that is excellent in energy efficiency, operability and ink-fixing property and is a highly human- and environment-friendly, simple and compact apparatus, and a printer that is equipped with the ink fixing apparatus and can provide high-quality images at low cost. The ink fixing apparatus of the present invention includes at least fixing a print ink to a base material using a discharge generated between electrodes under pressure close to atmospheric pressure, wherein the print ink includes at least a non-volatile organic compound bearing a carboxylic group and includes no photopolymerization initiators.

Abstract: Disclosed is a duplex printer which is capable of performing simplex printing without wasting a master and providing a print output with a satisfactory image quality at the time of duplex printing, and which is capable of suppressing an increase in installation space while effecting adjustment on the print image position in the sheet conveyance direction. The duplex printer includes a printing section, a sheet feeding section, a sheet discharging section, an auxiliary tray, refeeding means for refeeding a sheet having an image printed on its front side, and a path selector that steers the sheet to one of the auxiliary tray and the sheet discharging section. In a duplex printing mode, a master having first and second perforated images formed thereon side by side is wound around a print drum, thereby performing duplex printing.

Abstract: Disclosed is a polygon mirror scanner device, used as a rotor, having a plurality of mirror faces on the outer peripheral face of a mirror member having a substantially tubular shape, with a tubular magnet adhered to the lower inner peripheral face of the mirror member. A depression is uniformly formed in the circumferential direction on the inner peripheral face, at a position opposite the mirror faces, such that a gap forms between the magnet and the inner peripheral face when the magnet is at a predetermined positioned. An adhesive agent is provided at the upper end and lower end of the magnet, but not in the gap. When the mirror faces are two-tiered, the upper end of the magnet is located at substantially an intermediate position in the height direction of the two-tier mirror faces.

Abstract: A stencil printer of the present invention prints an image on a paper sheet or similar sheet by use of UV (UltraViolet)-curing ink. The stencil printer includes a UV radiating device including a casing 32. A first and a second sheet sensor are so located as to be able to determine whether or not the sheet is remaining in the casing. At lest one of the two sheet sensors is implemented as a reflection type sensor made up of an IR (InfraRed) emitter and an IR sensor.

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 bar code reader provided with a laser diode (2) and a rotatory mirror (8) for deflecting a laser beam emitted by the laser diode for scanning, wherein a strip (20A) attached to the rotatory mirror (8), serving as a sensing indicator, is sensed at a position corresponding to a reading start edge of a laser beam scanning range of a bar code (1), and rotation of the rotatory mirror (8) is stopped for a predetermined time length after sensing of the strip (20A) and measurement of a scanning time length up to the final position of bar code reading, respectively, in the case of automatic scanning while rotation of the rotatory mirror (8) is locked upon measurement of half of a scanning time length up to the final position of the bar code reading after the sensing of the strip (20A) in the case of manual scanning, so that the laser beam can be recognized with ease, enabling focusing thereof or the manual scanning to be implemented.

Abstract: A printing device capable of printing with either UV curable ink or non-UV curable ink and having a function of controlling so that printing under the printing conditions of the printing device in accordance with the selected ink to be used can be performed with simple operation. The printing device has a controller for performing control of executing warning report and/or disabling printing operation, when the type of the ink identified by the ink type detection device is not consistent with the type of the master identified by the master type detection device.

Abstract: When a holder of an ID card approaches an image formation instructing device for sending an image forming instruction to an image forming apparatus, an ID code stored in a RF-ID element built in the ID card is read by a RF communication device. When the image formation instructing device transmits an image forming instruction to the image forming apparatus in this condition, an image forming operation is executed and the number of sheets for image formation is counted by counting means. Further, the counted number of sheets for image formation is associated with an ID code having predetermined bearing on the personal ID code read by the RF communication device and thereafter stored and held in a number-of-sheets file. Thus, the number of sheets for image formation is managed without preparing a key counter, a key card, etc. and without special operation.

Abstract: A printing device comprising a stencil printing device which is excellent in operativity, in which a print drum with UV ink and non-UV ink can be used in a single stencil printing device. The printing device has a stencil printing control device and UV irradiation control device in which a drum unit ink type identifying sensor, which detects whether the print drum attached to the stencil printing device main body is a print drum unit for UV ink or a drum unit for non-UV ink, is used to operate at least a UV lamp, of the UV lamp and a UV auxiliary lamp, and to irradiate UV light when attachment of the drum unit for UV ink is detected, or to stop the operation of the UV lamp and UV auxiliary lamp when attachment of the print drum unit for non-UV ink is detected.

Abstract: The object of the present invention is to provide a flame retardant agent which can provide with high flame retardance with a very small amount of additives without impairing basic physical properties of resins and is highly safe and harmless to humans and environment without substantially having negative effect thereon, because the flame retardant agent does not contain halogen elements and phosphorus elements. To this end, the invention provides a flame retardant agent which comprises a polyvalent phenol compound, a saccharide compound, and a fatty acid compound and also provides a flame-retardant resin composition which comprises the flame retardant agent and a resin.

Abstract: A stencil printer of the present invention includes a print drum, an ink feeding device for feeding ink to the inside periphery of the print drum, an ink replenishing device for replenishing ink to the ink feeding device, and a controller configured to control, based on print conditions, replenishment of the ink to the ink feeding device effected by the ink replenishing device. The stencil printer with this configuration is capable of continuously operating even when the ink stored therein is degenerated.

Abstract: A releasing device of the present invention selectively moves one of a pair of conveying members for conveying a sheet into or out of contact with the other conveying member. A first moving device moves the one conveying member into or out of contact with the other conveying member. A second moving device 72is connected to the first moving device for moving the one conveying member in a releasing direction independently of the operation of the first moving means.

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: Disclosed is a duplex printer which is capable of performing simplex printing without wasting a master and providing a print output with a satisfactory image quality at the time of duplex printing, and which is capable of suppressing an increase in installation space while effecting adjustment on the print image position in the sheet conveyance direction. The duplex printer includes a printing section, a sheet feeding section, a sheet discharging section, an auxiliary tray, refeeding means for refeeding a sheet having an image printed on its front side, and a path selector that steers the sheet to one of the auxiliary tray and the sheet discharging section. In a duplex printing mode, a master having first and second perforated images formed thereon side by side is wound around a print drum, thereby performing duplex printing.

Abstract: A printing system including a plurality of different kinds of printers and a printer selecting device. The printer selecting device includes an accepting section for accepting information representative of a desired number of printings input, and selecting section for selecting one of the printers matching with the desired number of printings. Image data to be printed are sent from the printer selecting device to the printer selected. In this configuration, one printer most advantageous in printing cost for the desired number of printings, which is an important factor for the selection of a printer is selected.