Sharp Kabushiki Kaisha Corporation

Tomohiko Fujii

Susumu Murakami

Yoshie Iwakura

Takashi Hori

Kuniaki Nakano

Hideaki Kadowaki

Hiroshi Tachiki

Hideshi Izumi

Minoru Tomiyori

Kohichi Yamauchi

As a projection extending member is arranged adjacently to a projection, a sensor Sproduces an 'ON' state output when an eccentric cam starts turning even in non-printing mode. The time from when the eccentric cam starts turning until sensor Schanges its output from 'ON' to &#x201c;OFF&#x201d; becomes longer when a new intermediate transfer belt unit is used than when a used intermediate transfer belt unit is used. The length of this time is measured so as to detect whether the intermediate transfer belt unit is brand-new or old.

Transfer device including detecting mechanism for detecting replacement belt unit and image forming apparatus using the same

An ozone exhaust system in an image forming apparatus having a multiple number of process printing units, includes: exhaust ducts for exhausting ozone arising in the process printing units. In the ozone exhaust system, the exhaust ducts are mainly constituted of process printing unit's side exhaust ducts provided respectively along multiple charger cases and a main exhaust duct to which the process printing unit's side exhaust ducts are connected, and the process printing unit's side exhaust ducts are constructed so that the air current that flows into the charger cases and the air current that flows from the process printing unit's side exhaust ducts into the main exhaust duct are directed in the same direction.

Ozone exhaust system for image forming apparatus

In an image forming apparatus that uses a charging unit to charge a photosensitive drum, forms an electrostatic latent image by carrying out image exposure according to image information, and transfers to a paper the electrostatic latent image by developing the electrostatic latent image into a visible image using a developer so that the image information is presented, an exhaust ductfor exhausting air that contains ozone produced within a drum unit, which includes a photosensitive drumand a charging unit, and a ductfor taking in air, which draws in fresh air, are provided within the drum unitso that ventilation of the drum unitcan be carried out with excellent efficiency.

Image forming apparatus having charging unit with separate intake and exhaust ducts

A color image forming apparatus includes: process printing units each having a photoreceptor drum; a transfer belt to which toner images are transferred; a transfer roller for transferring, as a whole, the toner images on the transfer belt to recording paper; a cleaning unit for collecting the remaining developers that have been left over on the photoreceptor drums and the transfer belt, is constructed such that a positioning sub-frame which is set with a developer collecting container for storing the collected developers and positions the process printing units relative to the housing, on one side of the apparatus body is removably attached to the housing.

Waste developer collecting container for color image forming apparatus

An image forming apparatus is constituted so as to be equipped with transfer apparatus(es) having transfer roller(s) electrostatically transferring development image(s) from photosensitive drum(s) to transfer medium/media, and so as to be provided with transfer medium guide unit disposed downstream in transfer medium transport path(s) from location(s) at which photosensitive drum(s) oppose transfer roller(s), and such that transfer medium guide location(s) of transfer medium guide means is/are variable.

Growing community of inventors

Yamatokooriyama, Japan

Tomohiko Fujii