Duplo Seiko Corporation

Seiko Epson Corporation

Duplo Manufacturing Corp.

Duplo Seiki Corporation

Yoshihide Sugiyama

Kazuya Yamamoto

Katsunori Takahashi

Yasunari Okagaito

Hidemasa Kanada

Nobuki Tanimoto

Tetsuo Onishi

Ken Matsushita

Junichi Kakuta

Chiharu Taniguchi

Hiroki Ikeda

There is provided a sheet inverting and conveying mechanism for conveying a sheet in a first direction, inverting obverse and reverse sides of the sheet, and then conveying the inverted sheet in a second direction. The mechanism includes: a first conveyance section for receiving, at its conveyance face, one side of the sheet, and for conveying the sheet in the first direction; a sheet inverting section for receiving, at its bent inner peripheral face, one side of the sheet, and for inverting the sheet while bending the sheet along the bent inner peripheral face; and a second conveyance section for receiving, at its conveyance face, one side of the inverted sheet, and for conveying the sheet in the second direction, wherein the first conveyance section and the second conveyance section are formed so that the sheet is conveyed while being attracted to the conveyance faces.

Sheet inverting and conveying mechanism and sheet inverting and conveying apparatus

A turn guide is disposed between a first transport surface and a second transport surface on which a sheet is transported while being sucked. The turn guide has a plurality of guide ribs. The plurality of guide ribs have curved inverting transfer surfaces from an inversion start point corresponding to a first transport surface to an inversion end point corresponding to a second transport surface.

Paper transport apparatus with inverting turn guide having range of curvature radius

Provided is a sheet inverting apparatus wherein members, such as a roller, are not brought into contact with the printed surface of a sheet at all, and the occurrence of dirt can be prevented by eliminating friction of ink on the surface of the sheet. A first transport apparatus and a second transport apparatus each have a plurality of transport belts which move on transport tracks along sheet transport directions and a suction box which sucks the sheet on the transport belts through suction holes formed on the transport belts. A turn guide arranged between the first transport apparatus and the second transport apparatus has a plurality of guide ribs disposed between the transport belts. Each of the guide ribs coming into slidable contact with the sheet forms a curved inverting transfer surface from an inversion starting point side to an inversion end point side.

Sheet transport apparatus

A double-sided image forming device includes: a paper feeding section (); a printing section (); a first conveyance route () for conveying a fed paper sheet () to a paper discharge section () via the printing section (); and a second conveyance route () for receiving, on its conveyance surface, the paper sheet (), a first side () of which has been printed, from the first conveyance route (), and for conveying the paper sheet () while reversing it, thereby conveying the paper sheet () to the upstream side of the printing section () in the conveyance direction of the first conveyance route (), wherein the second conveyance route () has a reverse conveyance route () for receiving, on its conveyance surface, a second side () of the paper sheet (), and for conveying the paper sheet () while reversing it, and wherein the reverse conveyance route () is formed by a combination of a plurality of reverse mechanisms each including: a first conveyance section () for linearly conveying the paper sheet (); a reverse section () for reversing the conveyed paper sheet () while bending it along a curved inner peripheral surface; and a second conveyance section () for linearly conveying the reversed paper sheet ().

Double-sided image forming device

A plate-making apparatus for stencil printing includes a plate feed section which feeds the heat-sensitive stencil plate that is an extended thermoplastic resin film with a predetermined thickness, and a heater to form ink-permeable openings in the film by heating the film, in which an opposite side surface to the minute recess side of the film is heated by the heater, the heater is a thermal head, a tensile stress at the time of extension internally remains in said thermoplastic resin film, an energy output of the thermal head for heating sufficiently satisfies to fuse-penetrate a thin closing portion of the minute recess, but it is restricted to the range which does not fuse-perforate a thick portion except the recess portion of the film, so that the openings are formed by the heated fused portion communicating the minute recess.

Plate-making apparatus for stencil printing and stencil printing machine

A plate-making method for stencil printing in which heat-sensitive stencil plate material for stencil printing consisting of a thermoplastic resin film is melted by heating of a thermal head to perforate an ink permeable openings includes forming recesses on one side of the film. An opposite side to the one side of the film is heated so that the heated portion is melted for communication with the recesses to form ink permeable openings.

Plate-making method and plate-making apparatus for stencil printing and stencil printing machine

The present invention relates to an adhesive coating device for sheet-binding provided with a roller, part of which is immersed in adhesivestored in an adhesive reservoir, for applying hot-melted adhesivein the above-mentioned adhesive reservoiralong the arranged one-side edge of a bundle of sheetswhile rotating. The device includes an electromagnetic induction heating coildisposed in the vicinity of the above-mentioned roller, and a current supply devicefor supplying a high-frequency current to the above-mentioned electromagnetic induction heating coil. The above-mentioned rolleris formed of a heating member for generating heat using the Joule heat owing to an eddy current caused by a high-frequency magnetic flux generated by the above-mentioned electromagnetic induction heating coil, and the above-mentioned rolleris heated by supplying a current from the above-mentioned current supply deviceto the above-mentioned electromagnetic induction heating coilso that the adhesivestored in the above-mentioned adhesive reservoiris melted.

Adhesive coating device

An illegal-sheet-material detecting apparatus, which is adapted to detect whether the property of each of the passing sheet materials is legal or not in a sheet manufacturing machine, provided with a comparison circuit for detecting the lag of the same detection value of the n th+ first sheet material with respect to the detection value showing the property such as thickness, size or the like of the optional portion of the n th sheet material memorized in the memory circuit as an electric signal. When the lag detected by the comparison circuit has exceeded a predetermined range, the counting operation of the sheet material is caused to stop thereby to use the detection value of the n th sheet material as a reference value for comparing it with the n th+ first sheet detection value.

Illegal-sheet-material detection apparatus in sheet material

For use in a rotary printing machine comprising at least one rotary drum, an image carrier medium having an image area to be printed on an image supporting material, and a printing ink supply unit, an ink detecting device which comprises a plurality of sensor rolls rotatably supported in series on a single fixed shaft in frictional contact with the printing drum through a layer of printing ink interposed between said sensor rolls and said printing drum a first means for separately detecting rotational speed of each sensor rolls, a second means for detecting rotational speed of the printing drum, and a control means for comparing the rotational speed of each sensor roll, under the influence of the slip between the sensor rolls and the printing drum, and corresponding reference values respectively indicative of rotational speed of each sensor roll measured under such a condition that optimum quantity of printing ink is applied on the outer periphery of the printing drum, and accordingly controlling said ink supplying means so as to replenish the printing ink onto corresponding portions of the outer periphery of the printing drum which correspond to some sensor rolls the rotational speed of which exceeds the corresponding reference values.

Growing community of inventors

Kinokawa, Japan

Yoshihide Sugiyama