Ricoh Company, Ltd.

Other

Kohji Kamiya

Takayuki Yoshii

Minoru Matsuo

Tsuneaki Kondoh

Norihiko Aze

Kyoichi Ashikawa

Nozomu Takahata

Hidenori Machida

Michitaka Higaki

Hiroshi Yoshinaga

Masanao Ehara

Motokazu Hasegawa

Eiji Sawamura

Satoshi Tohkai

Atsushi Ishibe

Kazuo Uchida

Makoto Murata

A method and a device for coating a hollow cylindrical member. The method includes radially coating an entire inner surface of the hollow cylindrical member with a first coating material discharged by a first slit nozzle and simultaneously circularly coating an entire outer surface of the hollow cylindrical member with a second coating material discharged in an axial direction of the hollow cylindrical member by a second slit nozzle located opposite the first slit nozzle with the hollow cylindrical member therebetween. The first slit nozzle and the second slit nozzle discharge the first coating material and the second coating material, respectively, to a same height of the hollow cylindrical member relative to the inner surface and the outer surface thereof.

Method and device for coating hollow cylindrical member

An image forming apparatus includes a fixing unit for fixing a toner image on a recording medium. In at least one embodiment, the fixing unit includes a fixing member configured to heat and melt a toner. Further, in at least one embodiment, the fixing member has a surface contacting the toner image and includes a wettability not greater than 38 mN/m.

Fixing unit having a resin surface and image forming apparatus using the same

A fixing device including a heating roller; a fixing roller facing the heating roller; a fixing belt wound between the heating roller and the fixing roller, and including, a cylindrical substrate, and an elastic layer provided on or above the substrate except at end parts of the substrate; a pressure roller configured to press the fixing roller through the fixing belt; and a separation part configured to separate media from the fixing belt.

Fixing device including separation part for separating medium from fixing belt

A fixing apparatus including at least one transfer and fixing member which is placed in contact with an image carrier and a recording medium and configured to transfer and fix an image on the image carrier to the recording medium, at least detection mechanism configured to detect a jam generated on the recording medium, a separation mechanism configured to contact the transfer and fixing member with and separate from the transfer and fixing member from the image carrier or recording medium, the separation mechanism being configured to separate the transfer and fixing member from the image carrier or recording medium when the jam on the recording medium is detected by the detection mechanism.

Fixing apparatus, fixing member used in the fixing apparatus, and image forming apparatus having the fixing apparatus

In a method for evaluating a fixing member to fix a toner having a surface layer, a hardness test is carried out by applying a pressure deformation from the surface side of the fixing member, and when a deformation of the surface layer by the pressure deformation is within an elastic range, the fixing member is regarded as a standard product.

Method for evaluating fixing member and fixing belt and thermal fixing roller

A fixing device configured to fix a toner image onto a recording medium includes a coil for generating a magnetic flux and a heat generation member for generating heat by the magnetic flux; the heat generation member includes a hollow cylinder shape, the coil has a loop-shaped coil disposed in a loop shape to sandwich inner and outer circumference planes of the heat generation member of the hollow cylinder shape, the loop-shaped coil is divided into an inside coil portion, which is positioned in the inner circumference plane side of the heat generation member, and an outside coil portion which is positioned in the outer circumference plane side of the heat generation member, and a terminal portion for connecting both of the coil portions is provided between the inside coil portion and the outside coil portion.

Fixing device and image forming apparatus

A method for evaluating a fixing belt includes forming a fixing belt which includes a substrate, an elastic layer laminated on the substrate, and a mold releasing layer laminated on the elastic layer. A universal hardness test for the fixing belt is performed. The fixing belt is judged as an acceptable product if a creep value Cis included within a range of 0.40&#x2266;C&#x2266;3.50 (%) when the universal hardness test is performed for the fixing belt and when the creep value C, which is measured from the side of the mold releasing layer, is defined by the following formula:-)/&#xd7;100 (%)where his a pushed depth when a test load reaches a predetermined value which is kept for a predetermined period of time, and his a pushed depth when a predetermined period of time is elapsed after the test load is removed.

Fixing belt and method for evaluating it

A fixing member includes a base member and an outermost layer located overlying the base member and having different fluororesins to fix a toner onto a sheet.

Flexible and durable fixing members and apparatus, and image forming apparatus

Disclosed are a fixing belt and a method for evaluating it in which an occurrence of crumple can be prevented by means of accurate evaluation whether a surface of the fixing belt has a appropriate flexibility or not. In this method for evaluating, a universal hardness test is achieved for the fixing belt in which an elastic layer and a mold releasing layer are laminated on a substrate, the fixing belt is judged as an acceptable product if a creep value Cis included within a range of 0.40&#x2266;C&#x2266;3.50(%) when a creep value Cwhich is measured from the mold releasing layer side is defined by a formula below.=()/&#xd7;100(%)where his a pushed depth (mm) when a test load reaches a predetermined value which is kept for a predetermined period of time, and

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Yokohama, Japan

Kohji Kamiya