Fuji Xerox Co., Ltd.

Toshihiko Mitsuhashi

Yusuke Kitagawa

Kazuya Yamanoi

Ryuichi Yamamoto

Atsushi Hiroi

Katsuya Saito

Masahiro Sato

Koichi Matsumoto

Takeshi Kawai

Hiromitsu Koizumi

Koji Miyake

Shigeo Ohno

Kanou Saitou

Akinori Ono

Toshio Masubuchi

Shoichi Morita

Tadashi Kiyama

Michiaki Takahashi

Satoru Hirosaki

Masahiro Satoh

Tomohiro Masumura

Noritake Ide

Hiroyuki Okawa

A heat-responsive switch includes a case member, a deformation member deformed from a shape concave to an inside of the case member to a convex shape in response to a temperature variation, a first electrode having a first contact, a second electrode having a second contact and bringing the second contact into contact with the first contact with the first contact impelled to the deformation member, a first pressing member pressing the first electrode to separate the first contact from the second contact by having an end pressed by the deformation of the deformation member into the convex shape, and a second pressing member pressing the deformation member to restore the deformation member to the concave shape and pressing the second electrode to keep the first contact and the second contact separated by having the end pressed to the deformation member from an outside of the case member.

Heat-responsive switch, fixing device, and image forming apparatus

A thermally-actuated switch includes a movable member that is provided between a second electrode and a displacement member so as to be movable in a first direction, is pushed at one end by the displacement member in a concave state to push the second electrode at the other end to bring a second contact into contact with a first contact, and is moved in the first direction by an urging force acting on the second electrode due to convex displacement of the displacement member, and a regulating member that regulates movement of the movable member in a second direction orthogonal to the first direction from a transmittable position where a pushing force from the displacement member is capable of being transmitted to the second electrode, and releases the regulation such that the movable member moved in the first direction by the urging force is removed from the transmittable position.

Thermally-actuated switch, fixing device, and image forming apparatus

Charger and image formation apparatus using the charger

A transfer device for transferring an image on an image carrier to a recording material the transfer device includes a transferring member adapted to nip and convey the recording material between the transferring member and the image carrier a guard resin layer having a surface microhardness not smaller than surface microhardness corresponding to polyimide, the guard resin layer provided on a surface of the transferring member and an adjustment resistance layer provided as a ground layer of the guard resin layer the adjustment resistance layer adapted to inhibit an accumulation of charge in the guard resin layer Or, the guard resin layer made of an epoxy resin is provided on the surface of the transferring member the adjustment resistance layer having a smooth interface with the guard resin layer the adjustment resistance layer adapted to inhibit accumulation of charge in the guard resin layer. Furthermore, a scraper for cleaning is provided on the surface of the transferring member so as to contact with the surface of the transferring member. An image-forming apparatus is constructed by using the transferring device.

Transfer device, image-forming apparatus using the same and method for producing transferring member

An image forming system wherein a predetermined monitor signal is applied to a transfer roll for estimating a resistance value of the transfer roll between one sheet of recording paper passing through the contact portion between a photosensitive drum and the transfer roll and the next sheet of recording paper being introduced into the contact portion and the transfer bias applied to the transfer roll is updated in response to the estimated resistance value. In the image forming system, if the time between one sheet of recording paper passing through the contact portion and the next sheet of recording paper being introduced into the contact portion is less than a predetermined time, updating of the transfer bias is inhibited, and further if updating of the transfer bias is inhibited successively a predetermined threshold value of the number of times or more, introduction of the next sheet of recording paper is delayed a predetermined time.

Image forming system and control method thereof

Growing community of inventors

Kanagawa, Japan

Toshihiko Mitsuhashi