Mita Industrial Co., Ltd.

Tsutomu Sugaya

Junichi Hirobe

Masahiko Kobayashi

Masakatsu Akashi

Yukihiro Aikawa

Makoto Okado

Tetsuro Kawashima

Ikuo Makie

Satoshi Ishii

Yoshiyuki Takeda

Hideki Takeda

Toshiyuki Osaka

Hiroyuki Sadamori

Takeshi Okuda

Yoshihisa Tanaka

Yasuyuki Hirai

Junichi Takamatsu

Yosuke Ohata

Toshiaki Kusuda

Hitoshi Oishi

An image forming device connected to one or more data processing devices is disclosed, and includes a printer unit, a copying unit, a document transport unit for transporting documents printed in the printer unit to a document mounting unit on the copying unit, and a guide member for moving the printer unit between a first position adjacent to the document mounting unit on the copying unit and a second position separated from the document mounting unit. The data processing device sends print jobs to the printer unit, and if multiple copies are desired, the printed documents are sent to the copying unit by the document transport device and copied.

Network printer/photocopier configuration and sheet transport system

An image forming apparatus which forms a toner image which is transferred onto a copy sheet includes a fixing unit having a heater for fixing the toner image onto the copy sheet at a predetermined fixing temperature. A cooling unit operates at a first cooling state for cooling the fixing unit. A mode selector is provided for setting a mode of the image forming apparatus to an energy saving mode in which heating operation by the heater is halted. A cooling controller suspends cooling operation of the cooling unit after a delay following a time when the image forming apparatus is set to the energy saving mode.

Image forming apparatus with time delayed cooling control

Image forming device with a printer unit and a copying unit

The present invention provides an electrical conductor for an optical system (M13) adapted to be stuck to a unit body (M11) for supporting a fluorescent lamp (M12). The electrical conductor (M13) includes: a base portion (M131) which is disposed in proximity to an outer peripheral surface of a glass tube (M121) of the fluorescent lamp (M12) such that mercury in the glass tube (M121) is diffusible, and which is opposite to the glass tube (M121) throughout the length thereof; and reflection portions (M132, M133) integrally formed with the base portion (M131).

Electrical conductor for an optical system

A fixing temperature control device according to the present invention is applied to a copying machine. A control section has a warm-up control mode and a normal control mode. In the warm-up control mode, energization to a heater is started in response to the start of copying, while being stopped at the time point where a temperature detected by a heat roller temperature detecting sensor reaches a first off temperature. In the normal control mode, on-off control of the energization to the heater is carried out utilizing a predetermined control temperature as a target subsequently to the termination of the warm-up control mode. The predetermined control temperature is corrected by adding a prescribed correction amount to a reference control temperature. It is preferable that the required correction amount includes i) an initial correction amount added in the early stages of processing in the normal control mode, ii) a correction amount at the time of passing paper sheets added when paper sheets pass between a heat roller and a pressure roller in a fixing device, and iii) an environmental correction amount added depending on an environmental temperature.

Fixing temperature control device

An image forming apparatus having components which are secured and supported by a resin apparatus body. The body if formed of mutually separable upper and lower casings, which are coupled in shiplap style. At least the upper casing is formed of a monocoque construction, and the lower casing may be formed of a monocoque construction as well.

Image forming apparatus having monocoque housing structure including

A sheet delivery mechanism includes a pair of delivery rollers which deliver a sheet along a sheet delivery passage of a sheet treatment apparatus for predeterminately treating the sheet, a sheet halting member for halting the sheet, and a pinching force adjusting member. The pinching force adjusting member adjusts the delivery rollers to place them into a first state where the sheet pinching force of the delivery rollers is relatively small so that the delivery rollers can slip on the halted sheet and into a second state where the sheet pinching force is relatively great so that the sheet can be delivered in the case where a sheet halt is released for delivery.

Sheet delivery mechanism

An image forming apparatus includes an image forming unit for forming and transferring an image of a document to a copy sheet, fixing unit including a fixing roller for fixing the document image to a copy sheet while transporting it, a heater for heating the fixing roller, and heater control unit for turning on and off the heater at specified timings so as to increase and maintain temperature of the fixing roller to and in a predetermined steady-state temperature range whose upper limit is a fixing temperature, the copy sheet being heated by the fixing roller having temperature of about the predetermined fixing temperature while transported, whereby the document image transferred to the copy sheet is fixed thereto, and control unit for controlling the heater control unit to control the heater within a copying period during which a copying operation is completed. The heater control unit on-off controls the heater only during the copying operation. Accordingly, power consumed by the heater is reduced and a temperature increase within the apparatus can be suppressed.

Image forming apparatus provided with a controller for fixing roller

An image forming apparatus comprises a photoreceptor, a developing roller for forming a layer of developer on a surface thereof to supply toner to the photoreceptor at a developing position, a bias supply for applying bias voltage between the developing roller and a ground, a conductive line for electrically connecting the developer layer with the ground, a detector for detecting toner density of the developer layer based on an amount of electric current flowing through the conductive line, and a voltage controller for preventing surface voltage of the developer layer from falling below a predetermined level despite the electric current flowing into the conductive line at least during a developing operation. Accordingly, there can be reliably prevented formation of fog on a copy because the surface voltage of the developer layer is maintained above the specified level at least during the developing operation.

Image forming apparatus having a toner density detecting device

An image forming apparatus includes a main body having an image forming device, a document table for holding the document, the table being movable reciprocatingly to the left and right sides of the apparatus when viewed from front over an upper surface of the main body, a drive device for moving the document table, and a movement control device for mechanically executing at least one operation of switching a moving direction of the document table and locking the document table in a predetermined position. Accordingly, there can be obviated the need for providing expensive electronic parts for switching the moving direction of the document table, stopping and locking the document table. Therefore, the image forming apparatus can be manufactured at lower costs.

Growing community of inventors

Osaka, Japan

Tsutomu Sugaya