Kyocera Document Solutions Inc.

Masato Usui

Hiroki Sakane

Takeshi Watanabe

Kenichi Satake

Naoto Miyakoshi

Hiroatsu Tamai

Yasuhiro Michishita

Shunsuke Yamasaki

Shinobu Ohata

Yuzuru Yuasa

Yusuke Tamekuni

Yasuko Takaori

Hiroomi Nakatsuji

Jun Nakano

Naoko Kawashima

Masaaki Maruta

An ink-ejection-malfunction-nozzle detecting unit sets nozzle groups such that each nozzle group includes nozzles with a first interval, prints a first test pattern that includes first bands (including thin lines) corresponding to the nozzle groups, sets nozzle subgroups such that each nozzle subgroup includes nozzles with a second interval in each of the nozzle groups, prints a second test pattern that includes second bands (including thin blank lines) corresponding to the nozzle subgroups such that a correction process is performed for adjacent pixels of the thin blank lines, detects a first band including density defect in a scanned image of the first test pattern, detects a second band not including density defect in a scanned image of the second test pattern, correspondingly to the detected first band, and detects an ink ejection malfunction nozzle on the basis of the thin blank line in the detected second band.

Image forming apparatus

A recording head recovery system includes a recording head, a cleaning liquid tank for storing cleaning liquid, a cleaning liquid supplying path which connects together the cleaning liquid tank and the recording head, a liquid supply mechanism which is provided in the cleaning liquid supplying path, and a controller. The controller performs recording head recovery operation including cleaning liquid supplying operation for supplying the cleaning liquid from liquid supplying openings of the recording head, wiping operation for wiping an ink ejection face of the recording head while a wiper retains the cleaning liquid, and backflow operation for controlling the liquid supply mechanism to make the cleaning liquid in the cleaning liquid supplying path to flow from the cleaning liquid supplying openings to the cleaning liquid tank.

Recording head recovery system, ink-jet recording apparatus therewith, and recording head recovery method

An image processing apparatus includes a halftone processing unit and a multi-level gradation processing unit. The halftone processing unit is configured to perform a halftone process for a target image and generate a binary image corresponding to the target image. The multi-level gradation processing unit is configured to (a) set a target pixel as a dot pixel in the binary image, (b) determine whether a dot exists on plural first periphery pixels with a predetermined first distance from the target pixel and plural second periphery pixels with a predetermined second distance from the target pixel or not, (c) derive a gradation level of the target pixel among predetermined three or more gradation levels on the basis of a number of dots on the plural first periphery pixels and a number of dots on the plural second periphery pixels and thereby generate a multi-level gradation image.

Image processing apparatus and image forming apparatus

A cleaning device includes a cleaning unit, a movement mechanism, and a unit mounting portion. The cleaning unit includes a cleaning part having a contact surface brought into contact with a surface of a conveyance roller. The movement mechanism moves the cleaning unit between a cleaning position at which the cleaning part comes in contact with the conveyance roller, and a mounting and removing position at which the cleaning part is located below the conveyance roller in a separated manner and the cleaning unit is allowed to be mounted and removed on and from the apparatus body. The unit mounting portion houses the cleaning unit disposed at the mounting and removing position. The cleaning unit is configured such that the cleaning unit in a state of being housed in the unit mounting portion is mounted and removed, together with the processing unit, on and from the apparatus body.

Cleaning device and image forming apparatus

A cleaning device includes a separation and contact mechanism that separates a web from a conveyance roller and brings the web into contact with the conveyance roller, and a controller. The controller includes a conveyed sheet number determination unit and a separation and contact control unit. The conveyed sheet number determination unit monitors a conveyed sheet number of both-surface image forming sheets where image forming processing is applied to both a first surface and a second surface with respect to the sheets conveyed by the conveyance roller, and determines whether or not a cumulative value of the conveyed sheet number has reached a predetermined threshold value. The separation and contact control unit controls the separation and contact mechanism so as to allow the web to be pressed to the conveyance roller by a pressing roller when the cumulative value of the conveyed sheet number has reached the threshold value.

A cleaning device cleans a conveyance face of a conveyance member conveying a sheet. The cleaning device includes a delivery roller, a pressure roller, a fixed roller and a winding roller. The delivery roller supports a web roll that a belt shaped web is wound into a roll. The pressure roller brings the web delivered from the web roll into pressure-contact with the conveyance face. The fixed roller keeps an extending angle of the web passed from between the conveyance member and the pressure roller constant. The winding roller winds the used web passed the fixed roller into a roll.

A cleaning device cleans a surface of a sheet conveyance member that conveys a sheet in an image forming apparatus which executes image forming processing, using a liquid recording material. The cleaning device includes a cleaning member having a contact surface configured to be brought into contact with the surface of the sheet conveyance member. A contact angle of the contact surface with the recording material is smaller than a contact angle of the surface of the sheet conveyance member with the recording material.

A cleaning device includes a cleaning unit and a movement mechanism. The cleaning unit includes: a cleaning part that has a contact surface extending along an axial direction of the conveyance roller and cleans the surface of the conveyance roller by bringing the contact surface into contact with the surface of the conveyance roller from below, and a cleaning housing that supports the cleaning part. The movement mechanism moves the cleaning unit between a cleaning position and a mounting and removing position below the cleaning position. The movement mechanism allows the cleaning part to be brought into contact with the conveyance roller at the cleaning position, allows the cleaning part to be disposed below the conveyance roller in a separated manner at the mounting and removing position and allows the cleaning unit to be mounted on or to be removed from an apparatus body.

Cleaning device and image forming apparatus provided with the cleaning device

A cleaning device includes a cleaning unit and a unit moving mechanism. The cleaning unit brings a web into contact with a conveyance member rotating around an axis and removes foreign matter adhered to the conveyance member. The unit moving mechanism displaces the cleaning unit to a cleaning position where the web is brought into contact with the conveyance member and to a separation position where the web is separated away from the conveyance member. When the unit moving mechanism displaces the cleaning unit from the cleaning position to the separation position, the cleaning unit is displaced in a counter direction opposite to a rotational direction of the conveyance member on a contact face between the conveyance member and the web.

A cleaning device includes a separation and contact mechanism and a controller. The controller includes a separation and contact control unit, a conveyance roller rotation control unit, and a take-up control unit. The separation and contact control unit controls the separation and contact mechanism so as to allow the web to be pressed to the conveyance roller when the conveyance roller is in a non-conveyable state. The conveyance roller rotation control unit rotates the conveyance roller at a cleaning rotational speed lower than a conveyance-time rotational speed of the conveyance roller in a conveyance state. The take-up control unit allows the take-up roller to perform a take-up operation of taking up the web corresponding to a rotation of a take-up roller plural times at a predetermined time interval within a cleaning time in a state where the conveyance roller is being rotated at the cleaning rotational speed.

A cleaning device includes a cleaning unit which removes foreign matter adhered on a conveyance face of a conveyance member conveying a sheet, by using a belt shaped web; and a unit moving mechanism which displaces the cleaning unit to a cleaning position where the cleaning unit comes into contact with the conveyance face and to a separation position separated away from the cleaning position. The cleaning unit includes a delivery roller delivering the web, a pressure roller bringing the web pressure-contact with the conveyance face and a winding roller winding the web passed the conveyance face. The cleaning unit is tilted such that a cleaning face of the web between the pressure roller and the winding roller faces upward as the cleaning unit is displaced from the cleaning position to the separation position.

A cleaning device cleans a surface of a sheet conveyance member which conveys a sheet in an image forming apparatus that executes image forming processing using a recording material, the surface carrying a solid substance that originates from the recording material and that adheres to the surface. The cleaning device includes a cleaning member including a contact surface configured to come in contact with the surface of the sheet conveyance member. The contact surface is an irregular surface rougher than the surface of the sheet conveyance member. At cleaning of the surface, the cleaning member makes a relative movement to the surface of the sheet conveyance member. The irregular surface is an irregular surface configured to take away the solid substance adhering to the surface of the sheet conveyance member when the cleaning member makes the relative movement.

A cleaning device includes a cleaning unit, a movement mechanism, and a positioning portion. The cleaning unit includes a cleaning part that has a contact surface extending along an axial direction of a conveyance roller and cleans the conveyance roller, and a cleaning housing that supports the cleaning part. The movement mechanism moves the cleaning unit between a cleaning position and a mounting and removing position. The movement mechanism allows the cleaning part to be brought into contact with the conveyance roller at the cleaning position, allows the cleaning part to be disposed below the conveyance roller in a separated manner at the mounting and removing position and allows the cleaning unit to be mounted on or removed from the apparatus body. The positioning portion restricts a relative position between the cleaning part and the conveyance roller by being brought into contact with the cleaning unit.

The cleaning device includes a cleaning unit. The cleaning unit includes a cleaning part having a contact surface brought into contact with a surface of a conveyance roller to clean the surface of the conveyance roller, and a housing that supports the cleaning part. The cleaning part includes a web of a strip shape, the web forming the contact surface that comes in contact with the conveyance roller, a pressing roller that presses the web against the conveyance roller, a feed-out roller that feeds out the web so as to cause a part of the web that comes in contact with the conveyance roller to shift, and a take-up roller that takes up the web. The housing has an opening that receives foreign matter dropping from the vicinity of a nip portion formed between the pressing roller and the conveyance roller.

Cleaning device and image forming apparatus including the same

A cleaning device includes a controller configured to control cleaning of a conveyance roller by a web. The controller includes a separation and contact control unit, a conveyance roller rotation control unit, and a take-up control unit. The separation and contact control unit is configured to control a separation and contact mechanism so as to allow the web to be pressed to the conveyance roller when the conveyance roller is in a non-conveyable state. The conveyance roller rotation control unit rotates the conveyance roller in a state where the web is pressed to the conveyance roller. The take-up control unit is configured to allow the take-up roller to perform a take-up operation of taking up the web by rotatably driving the take-up roller plural times at a predetermined time interval within a cleaning time set in advance in a state where the conveyance roller is being rotated.

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Osaka, Japan

Masato Usui