Sharp Kabushiki Kaisha Corporation

Masaharu Kimura

Masahiko Fujita

Norichika Katsura

Hajime Horinaka

Yasuaki Fukada

Hiroshi Onda

Tadasu Taniguchi

Masatsugu Ohishi

Tetsuya Inui

Yoshiyuki Kobayashi

Yorishige Ishii

Hirotsugu Matoba

Masaya Asakawa

Susumu Hirata

Kohji Aoki

Shingo Abe

Kohji Tsurui

Hisashi Yoshimura

Shunichi Hayashiyama

Atsushi Ueda

Yasuhiro Takai

Norihiro Ochi

Hirotoshi Iemura

Hiroshi Kubota

Kazuya Koyama

Yoshiharu Yoneda

Noriaki Taguchi

Haruhisa Furumoto

Tatsuya Ogawa

Yuji Sawa

Yasunobu Ohkawa

Susumu Hashimoto

Kouichi Irihara

Fusao Iwagami

Shigeru Yoshida

Shinichiroh Hiraoka

Tsuyoshi Shibayama

Tadashi Noguchi

Rei Nakamura

A sheet feeding device includes a sheet feeding cassette, which is detachable with respect to a sheet feeding cassette mounting portion provided on an image forming device body. The sheet feeding cassette includes a storage portion that stores a paper sheet, a first regulator provided on a bottom portion of the storage portion that regulates the position of a paper sheet, and a movable placement plate that upwardly pushes a paper sheet stored in the storage portion. The movable placement plate includes a second regulator that regulates the position of a paper sheet having a different size to the size of a paper sheet that can be regulated by the first regulator.

Sheet feeding device and image forming device

A sheet discharge device of the present invention includes discharge rollers configured to transport a sheet in a predetermined transport direction and to discharge the sheet to a discharge tray, and an upper discharge tray disposed above the discharge tray with a space being interposed therebetween. A bottom face of the upper discharge tray that faces the discharge tray includes a guide rib extending in an oblique direction inclined relative to the transport direction.

Sheet discharge device and image forming apparatus including the same

An image forming apparatus () includes a discharge section (), a paper receiving tray (), a first detecting section (), a lever (), a second detecting section () and a decision section (). The first detecting section () is disposed in the discharge section (), and detects a paper jam. The second detecting section () detects a swinging state of the lever () from a first position at which the lever () is not in the process of receiving an action of the paper sheet to a second position. The decision section () judges an occurrence factor in a paper jam to be a user-induced factor when the second detecting section () detects a state in which the lever is at the first position in a state where the first detecting section () detects the paper jam. Also, the decision section () judges the occurrence factor in the paper jam to be an image forming apparatus-induced factor when the second detecting section () detects a state in which the lever is swung over the first position in the state where the first detecting section detects the paper jam.

Image forming apparatus that determines user-induced paper jam

A sheet conveying device () includes a plurality of first conveyance rollers () and a plurality of second conveyance rollers (). The sheet conveying device () includes stiffening rollers (). The stiffening rollers () are disposed coaxially with at least one conveyance rollers () among the first and second conveyance rollers () and (), and have diameters larger than diameters of the conveyance rollers (). The stiffening rollers () includes first stiffening rollers (), which apply conveying forces to a sheet (P), and second stiffening rollers (), which apply smaller conveying forces to the sheet (P) than the conveying forces to the sheet (P) in the first stiffening rollers ().

Sheet conveying device and image forming apparatus with the same

An image forming apparatus () at least includes a paper output tray (), an actuator () and a photo sensor (). The actuator () is supported in such a manner as to be swingable above a paper loading surface of the paper output tray (). The actuator () includes a fullness detection section () and a rear edge curling detection section (). The fullness detection section () is disposed at a tip portion of the actuator (), being configured so as to contact the uppermost paper on the paper output tray (). The rear edge curling detection section () is formed so as to extend from the fullness detection section () toward a direction that gets further away from the paper loading surface of the paper output tray () toward a direction generally parallel to the paper loading surface of the paper output tray () and opposite to a paper conveying direction.

Paper output device and image forming apparatus

According to an embodiment of the present invention, a sheet detection apparatus that detects a sheet includes an actuator unit that is rotatable around a rotational axis so as to adopt any of a protruding position in which the actuator unit protrudes into a detection area for detecting the sheet and a retracted position in which the actuator unit is retracted from the detection area, and an operation unit that is capable of switching between a retracted state in which the actuator unit is set to the retracted position and a protruding state in which the actuator unit is set to the protruding position. An image forming apparatus according to an embodiment of the present invention includes the sheet detection apparatus, and the sheet detection apparatus is provided in a main body of the image forming apparatus.

Sheet detection apparatus and image forming apparatus

In a paper feeder, an air hole that allows air to pass through is formed on a paper transport belt, a fan for breathing and exhausting air and an exhaust duct having an opening for exhausting air. Air is exhausted from the fan through the exhaust duct, the fan and an air intake duct for breathing air are connected to each other, and air is breathed from the air hole through the air intake duct towards the fan. This paper feeder includes: an air state detection unit for detecting at least one of an air pressure and an air flow rate in the air intake duct; an opening and closing unit provided to the air intake duct for opening and closing the opening; and a control unit for opening and closing the opening based on a result of detection by the air state detection unit.

Paper feeder and image forming apparatus including the same

A sheet transport apparatus includes a sheet transport portion that transports a sheet in a first transport direction and a second transport direction, a bending member that bends without breaking the sheet by corrugating the sheet in an orthogonal direction, and a restriction member that restricts, in a perpendicular direction, a corrugation in the sheet bent by the bending member. The restriction member is provided on an upstream side in the first transport direction of the bending member.

Sheet transport apparatus and image forming apparatus including the same

A sheet sorter includes a sheet discharge tray, a sheet conveyance unit, and a sheet pressing guide. The sheet conveyance unit is configured to convey sheets in a conveyance direction and configured to be shifted in a shift direction along a sheet plane and in a shift direction that intersects the conveyance direction, so as to sort the sheets loaded onto the sheet discharge tray from the sheet conveyance unit. The sheet pressing guide is configured to contact and press the sheets, configured to move together with the sheet conveyance unit in conjunction with the sheet conveyance unit moving in the shift direction, and configured to contact a topmost sheet among the sheets loaded on the sheet discharge tray only at a downstream edge of the topmost sheet in the conveyance direction.

Sheet sorter and image forming apparatus

In the present glossy paper, an opposite surface of a glossed and smooth image formation surface is rough-surfaced. Therefore, the glossy paper do not adhere together even under the high-temperature and high-humidity environment. In fact, the present invention provides glossy paper which can advantageously achieve a continuous paper feeding in the image forming apparatus regardless of the use environment conditions.

Glossy paper

A transport path switching unit is provided between transport rollers and pre-registration rollers, and control is performed to switch between a main transport path and an extended transport path of the transport path switching unit such that either the main transport path or the extended transport path is interposed as the part of the paper transport path between the transport rollers and the pre-registration rollers to vary a total length of the paper transport path.

Paper transport path of image forming apparatus

A paper feeding deviceprovided in an image forming apparatusA according to one embodiment of the present invention is provided with a loading memberin which sheets P can be stacked and a central bending sectionconfigured to upwardly raise a sheet transport direction X central area Pof the sheet P for sheets P stacked in the loading member

Paper feeding device and image forming apparatus with curl correction

In a fixing device, a heat roller and a fixing gear for rotating the heat roller are arranged concentrically, and coupled to each other by inserting a key formed in the fixing gear into a keyway formed in the heat roller. The keyway is designed such that the key is allowed to move along a direction in which the heat roller is rotated. For example, the keyway is formed by notching a free end of a one-side rotary shaft of the heat roller so as to extend along the direction in which the heat roller is rotated.

Fixing device and image forming apparatus

Growing community of inventors

Osaka, Japan

Masaharu Kimura