Mita Industrial Co., Ltd.

Kyocera Document Solutions Inc.

Yoshiaki Tabata

Tsukasa Sugiyama

Masayuki Kakuta

Hiroyuki Hamakawa

Sueaki Okamoto

Masaru Hatano

Ken Yoshizuka

Hiroshi Kageyama

Kei Tanaka

Haruya Osaka

Seitaro Yoshida

Masaya Tashiro

Kunio Nakai

Kenichi Ashida

Masayuki Sago

Shinji Ogaki

An embodiment of an image reading device may include a light source, an image reading unit, a drive control unit, a white reference member, a chromaticity detecting unit, a reference value storage unit, a chromaticity change calculating unit, and/or a control unit. An embodiment may include a photoelectric conversion element that reads an image illuminated by the light source. In some embodiments, may measure the chromaticity of a white reference member. In some embodiments, a reference value storage unit may store a reference value representing the chromaticity of an image. In an embodiment, a control unit may control an operation of the device according to the calculated amount of chromaticity change. An embodiment may include measuring the luminous intensity of a light source and storing a reference value representing the luminous intensity of the light source. Some embodiments may include making adjustments to images.

Image reading device and image forming apparatus

An automatic document conveying device comprises a document table on which documents are placed; a vacuum separating/feeding means for feeding the set documents placed on the document table; a set document stopper for positioning the front ends of the documents placed on the document table; and a discharged document stopper for restraining the movement of the document discharged onto the set documents after being fed by the vacuum feeding means and subjected to image processing. A first opening and a second opening are provided in the document table. The vacuum separating/feeding means is disposed below the first opening. A feed drum connected to the vacuum chamber of the vacuum separating/feeding means via an opening/closing means is disposed below the second opening.

Automatic document conveying device

A temperature controlling device for controlling the temperature of a heating member of a fixing unit of an image forming apparatus, the heating member being heated by a heater to perform a fixing operation at a predetermined fixing temperature, the temperature controlling device is provided with a controller which is operable to control the heater to selectively keep the temperature of the heating member at a first energy saving temperature smaller than the fixing temperature and a second energy saving temperature smaller than the first energy saving temperature when the fixing operation is suspended.

Multi-level energy saving temperature controller for image forming

The surface of a rotating photoreceptor is charged by main chargers and an electrostatic latent image is formed on the charged surface of the photoreceptor by use of an optical system. The electrostatic latent image is developed into a toner image with toner. The toner image is transferred to a copy sheet at a transfer section and an automatic voltage control is performed to regulate the output voltage of the main chargers so that the surface of the photoreceptor is charged to a predetermined charge when a power switch is turned on. A control unit is provided which performs the automatic voltage control also when the output of an ejection sensing switch representative of the number of image formations is greater than or equal to a predetermined value and the output of a development thermistor is higher than or equal to a predetermined temperature.

Image forming apparatus with automatic voltage control

A separating corona discharger 40 is provided with a first separating discharge wire 42 and a second separating discharge wire 43. The wire diameter of the first separating discharge wire 42 is set to, for example, 60 .mu.m, and the wire diameter of the second separating discharge wire 43 is set to, for example, 100 .mu.m. The first separating discharge wire 42 and the second separating discharge wire 43 are connected in parallel to an AC high-voltage power supply of a constant current type at the offset current. Accordingly, a large number of minus current components flow from the AC high-voltage power supply 46 into the discharge wire 42 having a small wire diameter from which discharge having minus components is easily induced, to obtain a desired distribution of a discharge having a large number of minus current components.

Separating device for image forming apparatus

A toner hopper which is arranged upwards of the developing unit is elevatably supported in the image forming device in the vertical direction thereof and the connection between the toner hopper and the developing unit can be cancelled by lifting up the toner hopper when drawing out the developing unit so that the structure of the connection portion therebetween can be simplified and the sliding portion can be eliminated to thereby eliminate wearing at the connection therebetween. Furthermore, an apparatus for automatically raising and lowering the toner hopper and an apparatus for maintaining the horizontality of the toner hopper when being elevated and lowered is provided.

Developer unit and a toner hopper for an image forming device

An image forming apparatus having a receiving unit for receiving a sheet on which a first image is formed. The receiving unit includes an inlet for receiving the sheet, a tray member for supporting the received sheet, an outlet through which the received sheet is re-fed, and an aligning device. The aligning device includes a pair of standing members positioned on the tray member in spaced relationship with each other a predetermined distance. The standing members extend upward to a level which is higher than the inlet. And at least one of the pair of standing members has a widened portion for guiding the sheet passing through the sheet inlet. The sheet is guided by the widened portion and aligned on the tray member by the pair of standing members and the sheet is re-fed out of the tray member to form a second image.

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Osaka, Japan

Yoshiaki Tabata