Canon Kabushiki Kaisha

Takuma Tadomi

Junichi Moteki

Akiyoshi Shinagawa

Ikuo Nakamoto

Toru Katsumi

Tatsuo Yasui

Takahiro Ohnishi

Shigeaki Takada

Daigo Matsuura

Masayuki Tamaki

Yasuharu Chiyoda

Masahiro Tsujibayashi

Tatsuhito Watanabe

Kohei Aoki

An image forming apparatus includes a fixing belt, a pressure rotary body, a nip forming member, a detection unit, and a control unit configured to control a sheet interval to be a first sheet interval and a second sheet interval, wherein the control unit is configured to, in a case where time taken for a center position of the fixing belt to move, in the width direction, from a first position to a second position is equal to or less than a threshold, control the sheet interval to be the first sheet interval, and wherein the control unit is configured to, in a case where the time taken for the center position of the fixing belt to move, from the first position to the second position is more than the threshold, control the sheet interval to be the second sheet interval.

Image forming apparatus

A fixing unit includes an endless belt, a heating unit configured to heat the belt, a pressure rotary member configured to form a fixing nip portion that nips and conveys a recording material with the belt, a pad configured to press the belt toward the pressure rotary member, a sliding sheet provided on the pad and configured to slide against the belt, a plate-like member configured to fix the sliding sheet to the pad, the sliding sheet being fixed in a manner sandwiched between the plate-like member and the pad, and fixing tools configured to fix the plate-like member at a plurality of positions along a longitudinal direction of the plate-like member. A width of the sliding sheet is wider than a width of the fixing nip portion and narrower than a width of the plate-like member in the longitudinal direction.

Fixing unit

A contact member comes into contact with a back surface of a recording material between a nip portion and a transfer portion in a conveyance direction of the recording material. The contact member is capable of being located at a first position, a second position, and a third position. A detection unit detects a position of the contact member so that the detection unit can detect the first position, the second position, and the third position. The contact member reaches the third position by being biased by the recording material from the second position.

Fixing unit having a sliding sheet with a width in a longitudinal direction smaller than the width of first and second contact members

A fixing device includes an endless belt; a driving rotatable member cooperative with the endless belt to form a nip for fixing a toner image on a recording material and for driving the endless belt; an urging member provided inside the endless belt to urge the endless belt toward the driving rotatable member; and a rubbing rotatable member for rubbing an outer surface of the endless belt.

Fixing device with roughening rubbing member for endless fixing belt

Fixing unit having a pad to press a belt on a supporting member and a sliding sheet fixed to the supporting member

An image forming apparatus includes a control portion configured to output, in a test mode, a recording member which has passed through a fixing nip portion in a case of a first temperature difference in which a center part temperature of a first rotary member is higher than an end part temperature of the first rotary member and a recording member which has passed through the fixing nip portion in a case of a second temperature difference in which the center part temperature is lower than the end part temperature by one operation of starting test mode to the input portion.

Image forming apparatus having a testing mode in which a temperature difference between a center part and an end part of a fixing unit rotary member is changed

An image forming apparatus includes an image forming device, a fixing device including a first rotary member of which a surface layer containing a fluororesin is brought into contact with a sheet surface having an unfixed toner image formed by the image forming device, and a controller. In a case that image formation processing for continuously forming a toner image on a plurality of predetermined sheets is executed, the controller can control conveyance of a sheet so that a portion of the surface layer of the first rotary member which is brought into contact with a trailing edge of a preceding sheet is brought into contact with a margin area on a leading edge side on a next sheet.

Image forming apparatus which controls period between trailing edge of preceding sheet and leading edge of next sheet

An image heating apparatus includes first and second rollers forming a nip therebetween to heat a toner image on a sheet; a rubbing roller for rubbing an outer surface of said first roller; a moving mechanism for moving said rubbing roller between a contact position for contacting with said first roller and a spacing position spaced from said first roller; a measuring portion for measuring time elapsed from start of a rubbing process; a controller for discriminating, upon receipt of image heating instructions during the rubbing process execution, whether to continue the rubbing process or to interrupt the rubbing process and execute the image heating process, on the basis of the time measured by said measuring portion.

Growing community of inventors

Toride, Japan

Takuma Tadomi