Abstract: A water-in-oil emulsion ink comprises a water phase and an oil phase, wherein the water phase comprises a pigment, a resin and a water-soluble alcohol or polyol with a boiling point greater than 197° C. The ink has improved image recovery properties.

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 water-in-oil type emulsion ink composed of 10–90% by weight of an oil phase and 90–10% by weight of an aqueous phase. The oil phase contains an esterified vegetable oil (an esterified vegetable oil obtained by recycling and esterifying edible waste oil such as soybean methyl ester, soybean butyl ester, or tall oil butyl ester).

Abstract: Disclosed is a multi-layer paper suitable as a material for preparing heat-sensitive stencil printing masters. The multi-layer paper is produced by combining a plurality of thin paper layers by paper making. The multi-layer paper has a peel strength of 10 N/m or less and may be delaminated into at least two tissue sheets.

Abstract: An induction heating device includes a plurality of induction coils connected to a single high-frequency power source and each being able to be ON/OFF controlled by a switch. A current is selectively fed only to desired part of the induction coils or to all of the induction coils connected in parallel. The coils are driven by a current fed thereto at the same time in the same phase. The device may include inverters for controlling power to be fed coil by coil. The device is free from interference and irregular heating and can readily cope with a change in a heating range while controlling power coil by coil.

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.

Abstract: An image forming apparatus of the present invention includes a stencil printer section and a non-stencil printer section and can form a stencil image and a non-stencil image on a single sheet. A first and a second adjusting section respectively adjusts the position of the stencil image and that of the non-stencil image relative to the sheet in the direction of sheet conveyance and the widthwise direction of the sheet perpendicular to the direction of sheet conveyance. A first shift display section displays an amount of shift of the position adjusted by the first adjusting section. A first moving mechanism shifts the position of the stencil image in accordance with the operation of the first adjusting section. A second shift display section displays an amount of shift of the position adjusted by the second adjusting section. A second moving mechanism shifts the position of the non-stencil image in accordance with the operation of the second adjusting section.

Abstract: A master roll includes a cylindrical core, a long-formed stencil wound around the core, and a ring-like identity member inserted in at least one side of inner periphery of the core. The identity member has a feature according to a variety of the stencil. The feature of the identity member is identified by size of the identity member, inserted position of the identity member or the like, so that many varieties of the master roll can be easily manufactured. A master roll holding apparatus can hold the master roll.

Abstract: An induction heating type fixing device for an electrophotographic image forming apparatus is disclosed. An inducting heating coil has a plurality of bobbins each having a particular diameter and assembled in a telescopic manner. A particular conductor is wound round each bobbin beforehand with leads being laid inside of the conductor. The bobbin may be implemented as a plurality of bobbin members removably connected together.

Abstract: A stencil printer of the present invention includes a print drum and a pressing member selectively movable into or out of contact with the print drum. A duplex master, formed with a first and a second image in the lengthwise direction thereof, or a simplex master formed with a third image is wrapped around the print drum in a duplex mode or a simplex mode, respectively. The stencil printer is capable of selectively performing a duplex print mode operation, which consists of a front printing step and a rear pining step following the front printing step, or a simplex print mode operation. When the operator of the printer selects the duplex print mode to cause the duplex master to be wrapped around the print drum and then replaces the duplex print mode with the simplex print mode, the stencil printer produces an alarm and inhibits the simplex pint mode operation from being started.

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: There is provided a used-master security system for a printing apparatus that can prohibit the removal of used masters for any type of master and to safely secure used masters by prohibiting the removal of used masters; a used-master security method for a printing apparatus in which the used-master security system of the printing apparatus is used; and a printing apparatus capable of prohibiting the removal of used masters with the used-master security system for a printing apparatus, and having a used-master storage device for storing used-masters provided to the printing apparatus main body and a used-master security device that is capable of prohibiting the removal of used masters inside the used-master storage device.

Abstract: A stencil making device of the present invention includes a front tension roller pair located downstream of the nip of a thermal head and a platen roller for applying tension to a stencil. The front tension roller pair is made up of an upper roller formed of rubber and a lower roller formed of metal. The lower roller is formed with a plurality of groove portions spaced from each other in the axial direction and each having a small diameter not contacting the stencil. The groove portions therefore reduce the area of contact with the stencil for thereby reducing the influence of static electricity on the stencil.

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 sheet storage device improved in terms of its performance in aligning sheets discharged from an image forming apparatus. In the sheet storage device, a plate-like shock absorber is superimposed on a surface of a fence member forming an end fence, and a lower end portion of the shock absorber is fixed to the fence member, with an intermediate portion thereof being curved so as to be convex and an upper end portion thereof being movably engaged with an engagement portion formed at an upper end of the fence member. In the intermediate portion, a spacer is provided between the fence member and the shock absorber to form a gap between the shock absorber and the fence member at a position where the shock absorber is hit by the sheets.

Abstract: A heat-sensitive stencil including a resin film on which a thin resin layer and a porous resin layer are formed in succession.

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 printing/verifying direction section in a control section directs a thermal head controller and a sheet conveying motor controller to do printing in accordance with a detection result by a sheet position detection sensor, so as to print image data in a printing image storage section on a sheet (label) by a thermal head. Further, based on printing position data from a printing data storage section, the printing/verifying direction section directs a verification section controller to operate a scanner controller so as to permit a scanner to read an image of a printed mark. The verification section controller compares the read image with printing data in the printing data storage section to judge whether the image is good or no good. When it is no good, the mark is returned to a printing position by the thermal head by a direction of a printing/verifying controller, so that the thermal head prints an overwriting image in an overwriting image storage section on the mark.

Abstract: The present invention provides a scanner control method capable of being shared even by a printer which is relatively low in write speed as compared with the read speed. In the case where a printer having a relatively lower write speed than the read speed is connected, an original image reading operation is performed at a high read speed, but the original image on the same main scan line is read by a number of times, m, (e.g., m=2) corresponding to a magnification ratio between the read speed and the write speed while decreasing the read speed in a sub scan direction, and only the image data obtained from a single read of the main scan line out of the m times of read is outputted by a thinning-out processing. By so doing, there is performed a read operation substantially matching the low write speed without any change in the actual read speed of a read unit. In this way it becomes possible for a scanner to be shared even by a printer whose write speed is relatively low in comparison with the read 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.