Ricoh Company, Ltd.

Other

Hitachi Koki Co., Ltd.

Hitachi, Ltd.

Hitachi Printing Solutions, Ltd.

Akitomo Kuwabara

Makoto Kobayashi

Isao Nakajima

Shigeru Obata

Sho Sawahata

Shuho Yokokawa

Tetsuya Ohba

Hidefumi Ohtsuka

Hirotaka Kobayashi

Hiroyuki Mabuchi

Kazutaka Sato

Kazuhiro Akatsu

Akihiko Yamazaki

Yuuji Ohmura

Kahei Nakamura

Hironori Numata

Hirofumi Ohkushi

Yasushi Kinoshita

Yutaka Nagasawa

Masaru Hoshina

Tetsuya Ooba

Arinobu Yoshiura

Yukio Otome

Yasushi Hashimoto

Tsukasa Onose

Yuuki Kikushima

Kenji Asuwa

Noriaki Takenaga

Takeshi Terakado

Hiromitsu Fukuda

Jun Ogino

Hidenori Iwanaga

Kohji Kuwana

Katsumi Ishizawa

Junichi Moribe

Yoji Hirose

Hiroshi Takaki

Takuto Kido

A heating apparatus, an image forming apparatus, and a liquid discharge apparatus. The heating apparatus includes a heating roller having a heat source inside, an end holder in which a portion of the heat source is disposed, the end holder holding an axial end of the heating roller rotatably, and an air supply device configured to supply air into the end holder in a direction intersecting with an axial direction of the heating roller. The heating apparatus includes a heating roller having a heat source inside, and an end holder in which a portion of the heat source is disposed, the end holder rotatably holding an axial end of the heating roller. In the heating apparatus, the end holder has an air inlet opening through which air is supplied into the end holder and an air outlet opening through which air is ejected outside from inside the end holder.

Heating apparatus, image forming apparatus, and liquid discharge apparatus

A liquid surface detector includes a tube through which a liquid passes; an electrode pin disposed on an inner wall of the tube; and a ground pin disposed on the inner wall of the tube. In the liquid surface detector, the electrode pin and the ground pin are disposed in different directions as viewed from an axial direction of the tube.

Liquid surface detector, liquid coating device, and liquid discharge apparatus

An application device includes a conveyer to convey a recording medium, an application roller to apply a treatment liquid to the recording medium, a pressure roller to sandwich the recording medium with the application roller to press the recording medium against the application roller, and a winding member to form a curved conveying path to have the recording medium curved along a conveying direction to wind the recording medium around the pressure roller. The pressure roller comes in contact with the application roller when applying the treatment liquid and separates from the application roller when not applying the treatment liquid. A predetermined positional relationship is maintained between the pressure roller and the winding member while the pressure roller moves close to the application roller to be in contact with the application roller, or the pressure roller moves away from the application roller to be separated from the application roller.

Application device and image forming system

There is provided a process liquid coating apparatus comprising: a recording medium conveyance unit configured to convey a recording medium; a coating roller configured to rotate in accordance with the conveyed recording medium to apply process liquid on a surface of the recording medium; a pressure roller configured to cause the coating roller to apply the process liquid on the surface of the recording medium by forming an abutment part for nipping and pressing the recording medium with the coating roller; and a winding member configured to form a bent conveyance path along which the recording medium is bent with respect to a conveyance direction so that the recording medium is wound around the surface of the pressure roller, wherein the winding member is disposed adjacent to the pressure roller.

Process liquid coating apparatus and image forming system

A treatment liquid coating apparatus includes a conveyance member to convey a recording medium; a coating roller, to apply treatment liquid on the recording medium, driven to rotate with the conveyance of the conveyance member; a pressure roller to press against the coating roller to hold the recording medium that is placed between the coating roller and the pressure roller; and a reciprocating mechanism to reciprocate the coating roller in a width direction of the recording medium during printing.

Coating apparatus and image forming system

A treatment liquid application device for use in an inkjet printer includes an application roller to apply a treatment liquid to a recording medium before an image is formed on the recording medium, a squeeze roller disposed below the application roller and to make a pressure-contact with the application roller, a treatment liquid supply unit to supply the treatment liquid to a nip part between the application roller and the squeeze roller, and a pressure roller disposed above the application roller and to cause the recording medium to make a pressure-contact with the application roller. When the application roller applies the treatment liquid to the recording medium, a position of the application roller is not restricted in approximate load directions of the squeeze roller and the pressure roller but is restricted in directions other than the approximate load directions.

Treatment liquid application device and image forming system

A transfer apparatus capable of suitably measuring the amount of electric charges transferred from a transfer member to a transfer body and performing a transfer process without degrading the image quality by supplying an amount of electric charges suitable for any type of transfer body onto which an toner image is to be transferred. The transfer apparatus in an image forming apparatus employing an electrophotographic method includes the transfer member electrically charging the transfer body; a charging unit for electrically charging a surface of the transfer member; and voltage sensors for measuring the voltage at each of an upstream area and a downstream area on the transfer member with respect to a transfer nip section of the transfer member.

Methods and apparatus for transferring a toner image via electrophotographics

An image forming apparatus has a photoconductive drum or belt supporting a toner image, a transfer member transferring the toner image onto a recording medium, a transportation device transporting the recording medium to between the photoconductor and the transfer member, a charger charging a surface of the transfer member to the anti-polarity of the electric charge of the toner image, a rotation drive unit rotating the transfer member to the same direction of the recording medium transportation, a contacting/removing unit that contacts the transfer member to the image supported member for printing and removes the transfer member from the image supported member when not printing, and a drive force transferring/blocking unit that transfers the drive force from the rotation drive unit to the transfer member before print starting-up and blocking the drive force during printing.

Image forming apparatus and tandem image forming apparatus

An image forming apparatus having a transfer assist mechanism is disclosed. The transfer assist mechanism includes a first blade holder having a first blade, second blade holders having corresponding second blades, and a first slide engaging member and a second slide engaging member which engage the first and second blade holders. When the first slide engaging member and the second slide engaging member are moved corresponding to the width of a continuous recording medium, the first blade holder and some of the second blade holders are selected corresponding to the width of the continuous recording medium, and the first blade and some of the second blades corresponding to the selected some of the second blade holders press the continuous recording medium.

Image forming apparatus

A web printer has a buffer for adjusting the traveling position of the web under its slack status, a tension assigning unit for assigning fixed tension to the web delivered from the buffer, a device for detecting the traveling position of the web delivered from the tension assigning unit, a sew correction unit for adjusting the skew of the web according to the output from the detection device, and an image forming unit that forms images on the web.

Web printers

When initially routing a continuous web along a path, the web walks across the width of the path, and uneven tension occurs causing the web to break in some cases when printing tension is applied thereto. Further, uneven web tension is produced on the right and left of the web by excessive walk control resulting from an excessive deviation of the web from the target position of a walk controller, with the result that the web is crumpled and broken. These problems are solved by maintaining a web tension that is lower than the printing tension until the web position converges on the target position of the walk controller after loading of the web, thereby reducing the amount of correction by the walk controller and the amount of web lost in the preparatory phase before printing, with the result that excellent image quality free from crumple or breakdown is ensured.

A printer has a web handling unit that includes a web conditioning device for providing fixed control of the moisture within the web being fed, a skew correction device for adjusting the traveling position of the web which has passed through the web conditioning device, and a tension assigning device for assigning fixed tension to the web. The printer also includes an image forming device that forms an image on the web transported from the web handling unit.

Printers and printing method

An image forming apparatus is provided in which a misregistration of an image forming-position due to a tension, acting on a continuous recording medium, and a fluctuation thereof, is corrected with a low-cost construction to provide an image of high quality. A pair of recording medium speed detection devices are provided upstream and downstream of an image forming section, respectively, and a misregistration correction amount is calculated from a detected recording medium feed speed so as to correct the image forming position.

An image recording apparatus for recording a two-color image on both surfaces of a continuous recording medium includes a toner image recording portion which has a toner carrier and transfers a toner image formed on a surface of the toner carrier onto the recording medium, a tractor for feeding the recording medium on which the toner image is transferred, and a both side fixing machine for receiving the recording medium fed by the tractor to fix the toner image transferred on the recording medium. In this image recording apparatus, guide rollers come into contact with non-printing portions on both side ends of the recording medium to apply tension to the recording medium by a spring and thereby gives a predetermined slack to the recording medium to absorb a difference in speed resulted between the tractor and the both side fixing machine.

Image recording apparatus

There is provided an image recording apparatus which does not cause a print shift or a color drift caused by vibration and a widthwise shift due to speed variation in a conveying direction of a continuous sheet such as rolled paper or folded paper, in which a variation in speed is prevented by rollers which wind and clamp the sheet on and between an upper and a lower roller which are driven by the conveying force of the sheet, so as to prevent occurrence of vibration in the conveying direction, and a guide roller having pins adapted to be engaged in sprocket holes of the sheet are provided between the set-up positions of the tractors.

Growing community of inventors

Ibaraki, Japan

Akitomo Kuwabara