Ricoh Company, Ltd.

Satoshi Tohkai

Yuusuke Furuichi

Daisuke Inoue

Yukimichi Someya

Hiroyuki Shimada

Yumiko Hayashi

Tsuneaki Kondoh

Norihiko Aze

Takayuki Yoshii

Michitaka Higaki

Kohji Kamiya

Hidenori Machida

Atsushi Takai

Machida Hidenori

A belt device includes a secured member, a belt, a pressure rotator, and lubricant. The belt has an endless shape and slides on a slide surface of the secured member. The belt has an inner portion having an elastic power of 55% or more and a sliding surface sliding on the slide surface of the secured member. The sliding surface has a surface roughness smaller than a surface roughness of the slide surface of the secured member. The pressure rotator presses the secured member via the belt to form a nip between the belt and the pressure rotator. The lubricant is interposed between the sliding surface of the belt and the slide surface of the secured member.

Belt device, fixing device, and image forming apparatus

A belt device includes a belt, a secured member, a pressure rotator, and lubricant. The belt is rotatable and has an endless shape. The belt includes an inner portion having an inner circumferential surface. The inner portion has an elastic power of 55% or more. The inner circumferential surface of the belt slides on the secured member. The pressure rotator includes a porous elastic body and presses the secured member via the belt to form a nip between the belt and the pressure rotator. The lubricant is interposed between the inner circumferential surface of the belt and the secured member.

A pressing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form and includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator is to slide. The slide surface has a smaller surface roughness than a surface roughness of the sliding surface. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant between the rotator and the secured member has a consistency of 275 or less.

Pressing device and image forming apparatus incorporating same

A fixing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form. The rotator includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is disposed inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator is to slide. The slide surface has a smaller surface roughness in a sliding direction of the rotator than a surface roughness of the sliding surface in the sliding direction of the rotator. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant is provided between the rotator and the secured member.

Fixing device and image forming apparatus incorporating same

A fixing device includes a rotator, a secured member, a pressure rotator, and lubricant. The rotator has flexibility and a sleeve form. The rotator includes an inner portion having a sliding surface. The inner portion has an elastic power of 55% or more. The secured member is disposed inside a loop of the rotator and has a slide surface on which the sliding surface of the rotator slides. The slide surface has a larger hardness than a hardness of the sliding surface of the rotator. The pressure rotator presses the rotator against the secured member and forms a nip between the rotator and the pressure rotator. The lubricant is provided between the rotator and the secured member.

Pressing device, fixing device, and image forming apparatus incorporating fixing device

A fixing belt for a fixing device of an image forming apparatus includes a base layer including a heat-resistant resin and a mesh member embedded in the heat-resistant resin and including a metal member, in which the mesh member includes an opening. The heat-resistant resin fills in the opening. A thickness of the thinnest portion of the mesh member is 40% or more of the thickness of the base layer. A fixing device includes a heating member; a pressure member; and the fixing belt as described above. Further, an image forming apparatus includes an image forming section and the fixing device including the above described fixing belt.

Fixing belt, fixing device, and image forming apparatus

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

A coating film forming apparatus, which applies a paint to an outer circumferential face of an object to be coated to form a coating film, the coating film forming apparatus, includes: a retention section which retains the coated object in a state in which the outer circumferential face is exposed and in which an axial core of the coated object is in parallel with a vertical direction; an applying nozzle formed in an annular shape, arranged to oppose the outer circumferential face and to have an interval therebetween, and coaxially arranged with the coated object retained by the retention section, the applying nozzle having a first slit, which discharges the paint to an inner circumferential face formed throughout a whole circumference thereof; a movement section, which relatively moves the retention section and the applying nozzle along the axial core; a paint supply section which supplies the paint to the applying nozzle; and a gaseous body discharger which discharges a gaseous body toward the paint discharged in a conic shape from the first slit, evenly throughout a whole circumference in a circumferential direction of the discharged paint, to change a discharging direction of the paint.

Coating film forming apparatus, electrophotographic fixing member formed by coating film apparatus, and image forming apparatus having electrophotographic fixing member

An image fixing apparatus stably maintains high efficiency in heat generation and reduces loss of electric power consumption for fixing an image, which includes a coil member to generate a magnetic flux, a heat member to generate heat with the magnetic flux, and a support member to support the coil member so that the coil member faces a front and a back side of the heat member, wherein the support member includes a heat dissipation part that releases heat generated in the coil member.

Growing community of inventors

Kanagawa, Japan

Satoshi Tohkai