Ricoh Company, Ltd.

Takashi Miyagi

Wataru Takahashi

Yoshinari Suzuki

Naoki Okazaki

Mitsuo Sato

Hiroshi Kanno

Hironobu Takasawa

Toshio Endo

Keiichi Miyakawa

Masao Takano

Tomoya Ito

An inkjet recording apparatus to print onto a surface of a recording medium includes an endless rotation conveyance member with a plurality of through-holes; a suction unit to suction the recording medium on the surface of the endless rotation conveyance member; an ink discharge head including ink discharge nozzles; a blank discharge ink receiver to receive ink through the through-holes; a control unit to make the ink discharge nozzles discharge ink at a predetermined timing; and a fixed plate along an inner surface of the endless rotation conveyance member, the fixed plate including an opening formed in a position corresponding to the ink discharge nozzles and a through-hole. The blank discharge ink receiver is disposed corresponding to the opening of the fixed plate and in close contact with the fixed plate so that an inside space of the blank discharge receiver becomes a substantially closed space.

Inkjet recording apparatus and image forming apparatus

An image forming apparatus includes an ink discharge unit including nozzles to discharge ink and to form an image on a recording medium; a conveyer belt to convey the recording medium so that the recording medium passes through an area facing the ink discharge unit, the conveyor belt including blank discharge holes to let the ink for a blank discharge through; a control unit to control an ink discharge operation of the ink discharge unit; a blank discharge receiver to receive the ink for the blank discharge, provided at a position facing the ink discharge unit across the conveyor belt; and a belt position detection unit to detect a position in a direction perpendicular to a belt moving direction of the conveyor belt, wherein the control unit controls the blank discharge operation of the ink discharge unit based on a detection result detected by the belt position detection unit.

Image forming apparatus

An image forming apparatus includes a recording head including heads containing arranged nozzles to discharge a droplet, the heads are arranged in a zigzag form along a nozzle array direction; a conveyer belt with suction holes to convey a printing medium in a direction intersecting a head array direction; and a control unit to control an blank discharging; wherein suction hole arrays including the suction holes arranged in the head array direction, are arranged at a predetermined interval; wherein one of the suction hole arrays is a reference suction hole array including the suction hole to pass a position facing the nozzle of a nozzle array end and the nozzle in an overlapping part of two heads in the nozzle array direction; and wherein the control unit makes each nozzle discharge a blank discharging droplet to the suction holes, using the reference suction hole array as a standard.

In a screen printing machine, its printing-plate discharge unit is provided with: a pair of printing-plate discharge rollers which may approach to a peripheral surface of a plate cylinder and may also draw therefrom; and a waste-paper container for receiving a waste printing plate having been peeled from the peripheral surface of the plate cylinder. In the waste-paper container is provided a waste printing-plate compression plate which is vertically movable in the waste-paper container. The compression plate is moved up and down in the waste-paper container by means of an operation means which is provided in a position outside the waste-paper container. The compression plate compresses the waste printing plate in the waste-paper container when moved downward therein.

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Miyagi, Japan

Takashi Miyagi