Fuji Xerox Co., Ltd.

Tomokazu Kurita

Shigeru Tanaka

Yukihiro Ichiki

Junichi Ozawa

Satoshi Honobe

Taro Mitsui

Mitsuhiro Matsumoto

Koji Nishimura

Hiroki Ando

Toshiyuki Matsui

Kanji Watanabe

Shigeo Ohno

Junichiro Sameshima

Ryota Kubo

Kazuaki Iikura

Hideki Moriya

Masao Ohmori

Shinya Makiura

Yasutaka Matsumoto

Tomohiro Ono

Takashi Kanagawa

Toshie Nakamoto

An image forming device includes an image holding member and a charging unit. In a case in which an AC current, while being increased, is supplied to the charging unit in a state in which a DC voltage value and an AC voltage value applied to the charging unit are maintained, or a case in which a DC voltage, while being increased, is supplied to the charging unit in a state in which the AC voltage value applied to the charging unit is maintained, a current detection unit detects DC current values. An inflection point derivation unit derives an inflection point of a correlation line representing an correlation between the detected DC current values and the supply amounts. An execution unit executes pre-specified processing when a characteristic value of the derived inflection point reaches a pre-specified value.

Image forming device, computer readable medium and photoreceptor deterioration condition estimation method

A waste developer collecting device comprising: a collecting container; a collecting opening; a conveying unit; a filter; a partition wall; and an air inlet.

Waste developer collecting device and image forming apparatus

An image forming apparatus includes a photosensitive member, a charging device, a developing device, a thickness detecting unit and a parameter setting unit. A photosensitive layer is formed on a surface of the photosensitive member. The charging device charges the photosensitive member. The developing device forms a toner image on the surface of the photosensitive member. The thickness detecting unit detects a thickness of the photosensitive layer on a basis of a value of a current supplied to the charging device. When the thickness detecting unit detects the thickness of the photosensitive layer, the parameter setting unit sets at least one of a charge parameter for the charging device and a development parameter to be different from that used in forming an image on a recording medium by transferring a toner image formed on the surface of the photosensitive member onto the recording medium.

Image forming apparatus with thickness detecting unit

There is provided an image forming apparatus including: an image carrier carrying an image; a charging roll charging the image carrier; a cleaning member configured to be brought into contact with the charging roll for cleaning the charging roll; a first holding portion detachably provided in an apparatus main body for holding the image carrier; and a second holding portion provided within the apparatus main body independently from the first holding portion, for holding the cleaning member.

Detachable holding portions in an image forming apparatus

A collected developer conveying device includes: a conveying passage through which collected developer is conveyed; a conveying member that is disposed in the conveying passage, and conveys the developer in the conveying passage by rotation thereof; a developer carrying body that holds developer on a surface thereof, and that is relatable; and a ventilation passage through which air passes from a developing container including the developer carrying body, wherein the conveying passage includes an air flow region formed in a part thereof upper than a rotational center of the conveying member in a gravitational direction, in a side of the conveying passage in which the conveying member rotates from an upper part of the conveying passage to a lower part thereof in the gravitational direction.

Collected developer conveying device and image forming apparatus which vents a developing container

Image forming apparatus with thickness detecting unit and parameter setting unit

An image forming apparatus includes: an image holder; an exposure member that has an exposure portion exposing the image holder; a first positioning unit that determines a distance in a first direction, which is a direction of an optical axis of the exposure member, between the exposure member and the image holder; and a second positioning unit that determines a position of the exposure member with respect to the image holder in a second direction being a direction of an axis line of the image holder, and a position of the exposure member with respect to the image holder in a third direction being perpendicular to both the first direction and the second direction, and that determines the distance between the exposure member and the image holder at a position substantially closer to the exposure member than the position of the first positioning unit.

Image forming apparatus, exposure apparatus, image holder, image forming method, and exposing method

A cleaning device includes a cleaning roll and an intervening member. The cleaning roll contacts the surface of a charge roll that charges a photoconductor, rotates, and cleans the surface of the charge roll. The intervening member is intervened between the charge roll and the cleaning roll and causes the charge roll and the cleaning roll to separate from each other. The intervening member may be spacers that are intervened at both end portions of the charge roll and the cleaning roll and form a gap between the charge roll and the cleaning roll. The intervening member may also be a lubricant.

Cleaning device and image forming apparatus

An image-forming apparatus includes: an image carrier; a latent image-forming unit for forming a latent image on the image carrier; a cleaning unit including a residue removal member a residue transport member; a residue collecting unit having an receiving port adapted to be able to connect to and be away from the ejecting port and to receive the residue ejected from the ejection port; a shield member capable of shifting between an ejection position and a shield position; and an approach and separation mechanism that moves the latent image-forming unit between an approach position where the latent image-forming unit approaches the image carrier and a separate position where the latent image-forming unit is separated from the image carrier, the approach and separation mechanism allowing the latent image-forming unit to move to the separation position as the shield member shifts to the shield position.

Image-forming apparatus having an approach and separation mechanism

Image forming apparatus

Growing community of inventors

Kanagawa, Japan

Tomokazu Kurita