Hitachi Koki Co., Ltd.

Ricoh Company, Ltd.

Hitachi, Ltd.

Ricoh Printing Systems, Ltd.

Muneyoshi Akai

Isao Nakajima

Yasuyuki Tsuji

Kunitomo Takahashi

Seiji Kageyama

Shuuho Yokokawa

Hiroshi Udo

Shinichi Kishi

Keiji Kataoka

Youji Hirose

Satoshi Aita

Shigeo Nemoto

Susumu Hashimoto

Hidetoshi Suzuki

Susumu Saito

Yukio Otome

Sho Sawahata

Junichi Matsuno

Shuho Yokokawa

Kazuhiro Akatsu

Shigeru Obata

Hiroshi Ueno

Tsukasa Onose

Isao Watanabe

Hidefumi Ohtsuka

Shunsuke Arita

Yoshio Ogura

Shigeru Toyazaki

Hitomi Shimizu

Yoji Hirose

Shinya Nohdomi

Katsuhito Komoda

Takeya Satou

Toshihiko Takenouchi

Noboru Aoki

A printing device includes a storage unit configured to store image data transferred from a high level device; a conveyance control unit configured to control conveyance of a printing medium and output a notification of a printable state when the printing medium is conveyed to reach a predetermined printable state; a printing unit configured to print the image data stored in the storage unit on the printing medium in response to the notification of the printable state output from the conveyance control unit; and a printing control unit configured to create print setting information including conveyance control information to control conveyance of the printing medium from printing information specified from the high level device and transmit the print setting information at least to the conveyance control unit. The conveyance control unit controls conveyance of the printing medium in accordance with the conveyance control information included in the print setting information.

Printing device and control method of printing device

A tandem continuous paper printer includes: a first printer engine; a second printer engine; and a printer controller; and performing tandem printing by performing printing using the second printer engine on a paper that has been printed on by the first printer engine, the tandem continuous paper printer being arranged so that the first printer engine is made to print tandem check marks on the paper at check page intervals and the second printer engine is provided with a sensor detecting the tandem check marks.

Tandem continuous paper printer

As a user selects one of error recovery methods for each error category, and the selected method is stored in a memory. When an error occurs, an error recovery method corresponding to an error category of the error is detected. If the detected method is automatic print continuation, then the error is ignored and print operation is automatically continued. If the detected method is a recovery by user's operation, then an error message is displayed, and a procedure is performed in accordance with an instruction from the user.

Printer enabling user to set error recovery method for each error category

A printer provided with a printer controller and a printer engine, wherein the printer controller includes a user interface control unit with a function for grouping together parameters associated with the paper, overlay and so on and recording this group of parameters under a desired name.

Printer facilitating settings of parameters on print paper

An exposure device of an electrophotographic apparatus which includes a rotary polyhedral mirror for scanning a plurality of laser beams on a photosensitive body, a beam interval adjusting member for adjusting an interval between the laser beams, a rotating mechanism for rotating the beam interval adjusting member, and an optical path position deciding device disposed on the side of the rotary polyhedral mirror in a laser beam advancing direction at the time of adjustment of the laser beam interval, the beam interval adjusting member being rotated so that the optical paths of the laser beams are decided by the optical path position deciding device. The optical path position deciding device may include a plate-like member with boresights or a CCD sensor and a CRT display.

Exposure device of electrophotographic apparatus with optical path

An image forming apparatus includes a feed roller mechanism disposed downstream of a transfer corotron 412 constituting a transfer section and composed of driven rollers 506 located on both edges of a continuous recording medium 100 which are outside an image transfer area and a drive roller 508 extending over the whole width of the continuous recording medium 100, so that when transferring a toner image from an image recording member 402, on which the toner image is to be formed, to the continuous recording medium 100, friction by the rollers achieves reliable conveyance against an attraction between the image recording member 402 and the continuous recording medium 100 without disturbing an unfixed image on the continuous recording medium 100. The image forming apparatus further includes a line sensor 43 for detecting a position where a reference edge of the recording medium is present, a line sensor output device which judges a position of the recording medium reference edge in cooperation with the line sensor to send a recording medium reference edge position signal or mask 61 adjustable in position for shielding a portion of a detection window of the line sensor, a recording medium position correction device 11 which finds a recording medium position correction value from an output of the line sensor for carrying out feedback control, and a guide 38 for preventing rising of the recording medium.

Continuous recording medium friction-conveying mechanism in image

A simple optical recorder which permits alignment of scanning positions of a plurality of laser beams with high accuracy and effects optical recording using the laser beams. The optical recorder is provided with a photosensitive drum which is scanned by a plurality of laser beams formed in rows at an inclined angle with respect to the direction of scan, a single photosensor for sensing each of the sweep positions of the laser beams, and a controller for controlling the scanning positions of the laser beams on the basis of a sensing result of the sensor. The controller is made up of an optical sensing signal separation circuit, synchronous clock generation circuits, FIFO memory circuit elements, and OR circuits.

Optical recorder having a signal separation circuit and a FIFO memory

A toner density detection method for an electrophotographic apparatus in which driving of a rotary roll provided at an outlet of a special vessel is continued for a predetermined period of time (e.g., several seconds) after the operation of the electrophotographic apparatus is stopped. All or substantially all of the developing agent is thus exhausted or removed from the special vessel after the electrophotographic apparatus is stopped, so that the true permeability of the developing agent can be detected by a permeability sensor when the operation of the electrophotographic apparatus is restarted. As a result, the toner density of the developing agent can be controlled and kept normal, so that the printing quality can be stabilized.

Toner density detection method for electrophotographic apparatus

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Hitachinaka, Japan

Muneyoshi Akai