Ricoh Company, Ltd.

Richoh Company, Ltd.

Hiroyuki Kiyoi

Kiyofumi Nagai

Hiroshi Saitoh

Masanori Hirano

Naoya Morohoshi

Kazuhiro Yuasa

Tohru Ohshima

Yozo Matsuura

Shiroh Kondoh

Shigetaka Sakakibara

Yoshiya Itoh

Masanori Yoshimura

Masahiro Kawabe

To provide an ink jet recording method including: performing image recording on a recording medium to obtain an ink adhesion quantity of 15 g/mor less of an ink containing at least a colorant, the recording medium having at least one coating layer on at least one surface of a substrate including cellulose pulp; and dry-to-touch drying the recorded image and bringing a heat source into direct contact with the recording medium for image fixing, wherein the recording medium is formed such that a transfer quantity of pure water into the recording medium in a contact interval of 100 ms that is measured with a dynamic scanning liquid absorptometer is 1 mL/mor more to 30 mL/mor less and a transfer quantity of pure water into the recording medium in a contact interval of 400 ms is 2 mL/mor more to 35 mL/mor less.

Ink, ink cartridge, ink jet recording apparatus, and ink jet recording method

In a fixing system used to an electrophotographic recording apparatus, when a fixing roller is heated to a temperature above a preset fixing temperature by a heater and then a thermistor senses that the surface temperature of the fixing roller falls below the fixing temperature, a heater controller energizes the heater for a predetermined driving time and then deenergizes of the heater for a predetermined heater interrupting time to thereby control the surface temperature of the fixing roller. The heater driving time and the heater interrupting time may be stored in a memory region in accordance with respective sizes of recording papers. The duty ratio of the heater may be changed when a predetermined number of images have been recorded or when the fixing system is continuously operated for longer than a predetermined time.

Method and apparatus for controlling a temperature of a fixing roller in

A xerographic image recording apparatus includes a photosensitive body moved along a circuitous path, an electric discharging unit for eliminating electric charges from the photosensitive body, a precharging unit for charging the photosensitive body electrically, an image writing unit for writing an image on the photosensitive body, an image developing unit for coating the photosensitive body by the toner to form a toner image on the photosensitive body, a recording sheet feeding unit for feeding a recording sheet along a sheet path, an image transfer unit for transferring the toner image onto a recording sheet, a cleaning unit for removing the toner remaining on the photosensitive body after the transfer of image on the recording sheet is completed, a toner supply tank for supplying the toner to the image developing unit, and a toner recovery tank for collecting the toner removed by the cleaning unit from the photosensitive body, wherein the toner supply tank and the toner recovery tank are assembled into a unitary body to form a detachable magazine.

Image recording apparatus having a toner supply tank and a toner

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Sagamihara, Japan

Hiroyuki Kiyoi