Kyocera Document Solutions Inc.

Rina Kikugawa

Ryohei Tokunaga

Yuta Kitabayashi

Hiroki Kawasaki

Shunsaku Fujii

Akihiro Kondo

Takashi Eiki

Tei To

Yuto Masaoka

Tomohiro Watatani

Kotatsu Kawaguchi

In a fixing device, a heater heats an endless rotatable fixing belt. A retention member includes a groove for retaining a lubricant and retains the heater such that a surface on a front side comes into contact with an inner circumferential surface of the fixing belt via the lubricant. A pressure member is pressed against the heater while the fixing belt is interposed therebetween and forms, with the fixing belt, a pressure region for heating and pressurizing a paper sheet onto which a toner image has been transferred. A guide guides the paper sheet to the pressure region. The guide causes the paper sheet to come into contact with the fixing belt at a position more on a downstream side of a rotation direction of the fixing belt than the groove, to guide the paper sheet to the pressure region.

Fixing device for image forming apparatus with retention member having groove for retaining lubricant

A fixing device includes a fixing belt formed in a cylindrical shape, with a lubricant applied to an inner circumferential surface, and set such that a circumferential surface rotates in a circumferential direction, a heater retention member that retains the heater, inside of the fixing belt, and a pressure member that defines a nip region, through which a recording medium is transported in a nipped state, between the pressure member and a portion of the fixing belt heated from inside by the heater, and drives the fixing belt to rotate. The heater retention member includes a first opposing face extending in a rotation axis direction of the fixing belt, and opposed to the inner circumferential surface of the fixing belt. The first opposing face includes slits aligned in the rotation axis direction of the fixing belt, and a lubricant is applied in advance inside the slits.

Fixing device including heater retention member, having slits formed on face opposing inner circumferential surface of fixing belt, and image forming apparatus

A fixing device includes a first fixing member, a second fixing member, a pressing member, and a heating device. The first fixing member is in an ungrounded state and comes into contact with a toner image on a sheet. The second fixing member is arranged opposite the first fixing member. The pressing member presses the first fixing member against the second fixing member so as to form, at the contact portion between the first fixing member and the second fixing member, a nip portion through which the sheet passes. The heating device heats the first fixing member.

Fixing device and image forming apparatus provided therewith

A heater includes electrodes and heating element pieces. The electrodes energize the heating element pieces with electricity. The heating element pieces are connected to the electrodes and arranged through a gap portion in the heater in a main scanning direction. A ratio of a second surface area of the gap portion to a first surface area of the heating element pieces is 0&#x3c;(second surface area of the gap portion)/(first surface area of the heating element pieces)&#x2264;0.5.

Fixing device and image forming apparatus

A duration measuring section measures a plurality of times. A temperature measuring section measures a temperature of a heater at each of the times. A temperature information outputting section outputs heater temperature information. A temperature tendency computing section outputs temperature tendency information of the heater. A drive controller outputs linear velocity information for controlling the linear velocity of a pressure roller. A pressure roller drive section drives the pressure roller.

Image forming apparatus

A fixing belt heats and fixes a toner image. A pressure roller rotates the fixing belt while in contact with the fixing belt. A heater heats the fixing belt. A lubricating oil forms an oil film between the heater and an inner peripheral surface of the fixing belt. A pressure roller driver rotates the pressure roller so that the lubricating oil causes the fixing belt to be out of contact with the heater.

A fixing device includes a fixing belt, a pressure roller, a reserving portion, and a heater. The pressure roller is provided in contact with an outer peripheral surface of the fixing belt. The reserving portion is provided inside the fixing belt and configured to reserve a lubricant. The heater is provided between the reserving portion and the fixing belt in such a way as to be pressed against the fixing belt, wherein a moving path is formed in the heater such that the lubricant moves from the reserving portion toward the pressure roller in the moving path.

Growing community of inventors

Osaka, Japan

Rina Kikugawa