Fujitsu Corporation

Fuji Xerox Co., Ltd.

Katsuya Shimatsu

Kenji Fuke

Katsumi Sugimoto

Tomoaki Tanaka

Eiji Suzuki

Yasuhiro Wakabayashi

Yoshihiro Tonomoto

Kiyoshi Chinzei

Naoto Hirao

Keiko Tonai

Yasuharu Takeuchi

Hiroaki Yoshida

Toshimasa Toyama

Hitoshi Yoshii

Makoto Maki

Kunihiko Sato

Shinichi Yaoi

Tsuneo Mizuno

Masaaki Ohyama

Shigenobu Utaka

Tsutomu Kawai

Hiroaki Naito

Teturou Nakashima

Jun Shimizu

Kazumi Kawabata

Katsumi Tateno

Yoshimi Takizawa

Shozo Tonai

An image recording apparatus includes: a transfer roller that transfers an image formed on a photoconductor drum onto continuous paper pressed against the photoconductor drum; and guide rollers that regulate the position of the continuous paper with respect to the photoconductor drum.

Image recording apparatus

Disclosed herein is a continuous medium printing apparatus for performing printing on both sides of a continuous medium. The continuous medium printing apparatus comprises: a conveyance system; a printing section; a feed-force adjustment section disposed on a downstream side of the conveying path from the printing section; and a feed-force control section. The conveyance system has a pair of conveyor rollers disposed on a downstream side of the conveying path from the printing section so that they are opposite to each other with the continuous medium therebetween, feed force being applied to the continuous medium by rotating the pair of conveyor rollers with said continuous medium clamped therebetween. The feed-force adjustment section varies said feed force by adjusting pressure of said pair of conveyor rollers with respect to the continuous medium. With this arrangement, the behavior of the continuous medium in the printing section is stabilized, and consequently, print trouble near the perforations in the continuous medium can be prevented.

Continuous medium printing apparatus

The invention provides a continuous medium printing apparatus which can exert a transporting force to act upon a continuous medium without additional provision of a new tractor mechanism or some other transport mechanism. In the continuous medium printing apparatus, upon automatic loading of a continuous medium, a control section controls a charging operation of a charging section so that a leading end portion of the continuous medium may be electrostatically attracted to an image forming drum. The image forming drum to which the continuous medium is attracted is rotated in a printing transporting direction to exert a transporting force to act upon the continuous medium to transport the continuous medium in the printing transporting direction. The present invention is applicable to an apparatus which prints on a continuous medium such as continuous recording paper (continuous paper), for example, by electrophotography.

The invention provides a developing apparatus which prevents transportation of aggregated toner powder to an image carrier and thereby assures a high print quality by taking a countermeasure to disperse aggregated toner powder when development of an image carrier with developer which includes toner powder and magnetic powder is performed. The developing apparatus includes a developing roller, a developer control member, and an aggregated toner dispersion member disposed in an opposing relationship to the transport magnetic pole of the fixed magnet on the upstream side with respect to the position of the developer control member and having a contact face in the form of a flat face with which the developer held on the outer circumferential face of the developing roller may be contacted under pressure in order to disperse aggregated toner powder in the developer held on the outer circumferential face of the developing roller. The aggregated toner dispersion member is disposed such that the contact face is spaced by a predetermined distance from the outer circumferential face of the developing roller and an angle defined between the tangential direction to the outer circumferential face of the developing roller at the position of the transport magnetic pole of the fixed magnet and the contact face is within a predetermined angle range.

Having aggregated toner dispersion member developing apparatus

A developing apparatus develops a latent image formed on a latent image carrying body with a developer. The developing apparatus includes a developing unit having a means for supplying the developer to the latent image carrying body to develop the latent image on the latent image carrying body and a developer housing for accommodating the developer. A developer storage box stores the developer which is to be supplied to the developing unit. The developer storage box is detachably mounted on the developing unit and has a volume substantially the same as a volume of the developer which can be accommodated in the developer case of the developing unit. The developer in developer storage box is supplied to the developing unit.

Image forming apparatus utilizing a two-component developing apparatus with automatic toner replenishment and developer replacement

The invention provides a double-sided printing apparatus which includes a first image forming process unit, a second image forming process unit, a first fixing station, a second fixing station and a transport system all disposed in a first housing. The transport system includes a transport direction changing element which contacts with one of surfaces of a medium to change the transporting direction of the medium so that the medium is sent out to the second fixing station. While the medium is transported in a substantially vertical direction in the single double-sided printing apparatus, the height of the transport path of the medium is suppressed so as not to become very high, thereby miniaturizing the apparatus. Further, intense light leaking from the fixing stations is intercepted so that deterioration of photosensitive drums of the image forming process units is prevented and a drop of the surface potentials of the photosensitive drums is prevented to extend the life of each photosensitive drum and prevent deterioration of the printing quality.

Double-sided printing apparatus

A fixing unit is provided with a fixing heat roller, a first reel supplying a cleaning member which cleans a surface of the fixing heat roller, a second reel taking up the cleaning member from the first reel, and a unidirectional clutch mechanism intermittently driving the second reel in a direction to take up the cleaning member using rotation of the fixing heat roller.

Fixing unit with undirectional clutch mechanism and image forming

An image forming apparatus including a plurality of developing units each having a developer storage portion for accommodating a developer; a plurality of feeding devices for discharging used developers from the respective developing units; and a single collecting device for collecting the used developers discharged by the respective feeding device.

Toner recovery device

An electrostatic recording system using a dielectric belt for conducting electrification of a sheet of paper and a transfer belt so that the sheet of paper is not wound and caught by a photoconductor drum, and a transfer voltage can be lowered so as to smoothly separate the sheet of paper from a transfer belt. The electrostatic recording system applies a voltage to only the dielectric belt at a stage before the sheet of paper 3 is attracted to the dielectric belt 10 and applies voltage to the sheet of paper 3 conveyed to the dielectric belt, and to the dielectric belt 10 while the sheet of paper and the belt are mutually superposed.

Electrostatic recording system using dielectric belt in which

Multicolor electrostatic recording apparatus and electrostatic latent

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Kawasaki, Japan

Katsuya Shimatsu