Ricoh Company, Ltd.

Tohoku Ricoh Co., Ltd.

Atsushi Ashikagaya

Satoshi Takahashi

Mituru Takahashi

Yasunobu Kidoura

Junichi Sasaki

Hironori Ohshima

Takayuki Onodera

Masaru Ohdaira

Yoshihito Ebina

Takanori Sakurai

Masashi Ohi

Yuuto Akiba

Yoshihiko Satoh

Shigeaki Gotoh

An internal cover that covers a unit inside an image forming apparatus is provided. The internal cover includes: a cover portion openable and closable by rotation on a rotation shaft; a hinge portion that forms the rotation shaft of the cover portion, where the rotation shaft is inclined with respect to a vertical direction of the image forming apparatus to allow the cover portion to be opened diagonally upward; and a hand-cranked fixing screw that maintains the cover portion in a closed state. The cover portion is opened diagonally upward as the hand-cranked fixing screw is released, and the cover portion is fixable in an opened state at a predetermined position.

Internal cover and image forming apparatus

A fixing device includes a body and a cover. The body includes a roller and a positioning projection projecting from the body. The cover is supported on one end side in an axial direction of the roller and has a slot in which the positioning projection is inserted. The cover is configured to pivot on the positioning projection inserted in the slot, from a closed position to a retreated position from the body.

Fixing device and image forming apparatus incorporating same

A fixing device includes a fixing rotator, a hollow pressure rotator, a heater, a holder, and a bearing. The pressure rotator is configured to contact the fixing rotator. The heater is disposed inside the pressure rotator. The holder is configured to hold the pressure rotator and the heater. The bearing is configured to rotatably support the pressure rotator. The holder includes a curved face contact portion having a curved face conforming to an outer circumferential surface of the bearing to contact the bearing. The bearing includes a flange. The flange is configured to divide the bearing into an inboard area and an outboard area in an axial direction of the pressure rotator. The inboard area and the outboard area are asymmetrical.

A stencil printing apparatus for wrapping a master around an outer circumferential surface of a plate cylinder to perform printing, the stencil printing apparatus being capable of preventing the occurrence of abnormal images or afterimage phenomenon which causes confidential information leakage, without increasing cost or causing any problems. This stencil printing apparatus has time measuring means for measuring a leaving time during which the apparatus is left stand, and when a plate discharge command is output before the leaving time exceeds a first predetermined time while the master is wrapped around the outer circumferential surface, the stencil printing apparatus is shifted to a standby state after the master is discharged from the outer circumferential surface.

Stencil printing apparatus

Disclosed is a duplex printer which is capable of performing simplex printing without wasting a master and providing a print output with a satisfactory image quality at the time of duplex printing, and which is capable of suppressing an increase in installation space while effecting adjustment on the print image position in the sheet conveyance direction. The duplex printer includes a printing section, a sheet feeding section, a sheet discharging section, an auxiliary tray, refeeding means for refeeding a sheet having an image printed on its front side, and a path selector that steers the sheet to one of the auxiliary tray and the sheet discharging section. In a duplex printing mode, a master having first and second perforated images formed thereon side by side is wound around a print drum, thereby performing duplex printing. The position of each print image with respect to the sheet in the sheet conveyance direction is adjusted by changing the timing with which the sheet is fed from the sheet feeding section to the printing section, and the timing with which the sheet is refed from the refeeding means to the printing section.

Stencil printer with a duplex printing capability

A stencil printer or similar printer and an ink viscosity sensing device therefor are disclosed. The viscosity of ink which is the root cause of the degradation of image equality ascribable to, e.g., temperature and down time is directly sensed. The viscosity is combined with other information including a set print speed and the kind of the ink in order to effect delicate print pressure control matching the actual conditions of the printer. Stable image quality with a minimum of fluctuation is achievable against the varying environment and without resorting to complicated control pattern tables or a number of sensors.

Growing community of inventors

Miyagi, Japan

Atsushi Ashikagaya