Fuji Xerox Co., Ltd.

Fujitsu Corporation

Masato Matsuduki

Osamu Shimizu

Takashi Saeki

Yuichi Inoue

Norio Hokari

Hirotake Sasaki

Toshinobu Hamazaki

Shinji Kawashima

Masahiko Sekimoto

Satoshi Hasebe

Teruki Kishimoto

Shigeo Ishida

Yasunori Toda

A rotation-information detecting device including: a rotatable rotary member having plural detection target portions arranged at predetermined intervals over an entire circumference of the rotary member; two detectors that are fixedly arranged at two positions of the rotary member in a rotating direction, and can detect the detection target portions; and a computation unit that computes rotation information of the rotary member based on detection information, wherein the two detectors are arranged along the circumferential direction of the rotary member at an interval of an angle of &#x3c0;/N, and wherein the computation unit includes an offset calculating section that offsets an eccentric error of the rotary member based on outputs of the two detectors at a current time point and n outputs at time points back from the current time point by phases of (n&#x3c0;)/N, to calculate a true rotational error.

Rotation-information detecting device, rotation control device, and image forming apparatus

A cleaning apparatus includes a contact unit that includes a container in which an opening is formed, the container accommodating cleaning liquid that cleans a forming surface of an ejection unit, the forming surface on which an ejection opening is formed, the ejection opening from which a liquid droplet is ejected; and an ultrasonic vibrator that is provided at the container and vibrates the cleaning liquid accommodated in the container, wherein the contact unit brings the cleaning liquid into contact with the forming surface in a state where the opening of the container faces the forming surface.

Cleaning apparatus and liquid droplet ejection apparatus

A drying device includes: a drying unit including: a heating space having a heating unit; a drying space that has a conveyance path of a recording medium and in which the recording medium is dried by radiation heat produced by the heating unit; and a partition member that separates the heating space and the drying space from each other in such a manner that gas can move between the heating space and the drying space; a first supply unit that supplies gas to the drying unit in a direction that is opposite to a conveying direction of the recording medium; and a second supply unit that supplies gas to the drying unit in a direction from the heating unit to the partition member.

Drying device and image forming apparatus

An image-forming device includes: a tension applying unit that applies tension to a recording medium; an image carrier that holds a toner image; a transfer unit that transfers the toner image held by the image carrier to the recording medium while tension is applied to the recording medium; a fixing unit that fixes the toner image transferred to the recording medium; and a retreat unit that causes the recording medium to move away from the fixing unit while tension is not applied to the recording medium, wherein rotation of the image carrier is suspended after the toner image is transferred from the image carrier to the recording medium, and after the suspension of rotation of the image carrier, application of tension to the recording medium is suspended, and the recording medium is caused to move away from the fixing unit by the retreat unit.

Image-forming device with a retreat unit and image-forming method employing a retreat unit

The present invention provides an image forming apparatus including: a drive roller; an image forming unit; a fixing unit; a sub drive roller provided at the downstream side of the fixing unit, nipping and conveying a continuous-form-paper, on which the toner image is fixed, to the downstream side, a rotational speed of the sub drive roller being changable; a buffer unit provided between the fixing unit and the sub drive roller, being able to increase or decrease a buffer amount of the continuous-form-paper according to expansion or contraction of the continuous-form-paper in the fixing unit; a detection section that detects the buffer amount of the buffer unit; and a control section that controls the rotational speed of the sub drive roller based on the detection result of the detection section such that the buffer amount of the buffer unit is kept substantially constant.

Image forming apparatus

A printing apparatus having a mechanism for transporting continuous paper includes: a frictionally transporting section for frictionally transporting the continuous paper; a paper braking section provided on an upstream side of the frictionally transporting section; a paper-position restricting section constituted by a pair of rollers arranged between the frictionally transporting section and the paper braking section obliquely at a predetermined angle &#x3b8; with respect to a paper transporting direction; a buffer device provided between the paper-position restricting section and the frictionally transporting section to absorb slack of the paper; and a printing section disposed on a downstream side of the frictionally transporting section.

Continuous paper transporting mechanism and printing apparatus having the same

In an image forming apparatus that forms a toner image on a continuous medium, the tension force applied to the continuous medium by the image forming drum is controlled within a proper range. The apparatus comprises a toner image forming unit forms a toner image on a rotating image forming drum, a transfer unit that transfers, to the continuous medium, the toner image on the image forming drum by a transfer current, and a control unit that monitors the tension force applied to the continuous medium by the image forming drum and controls the transfer current at the transfer area, based on the results of this monitoring. Alternatively, the apparatus increases the minimum printing ratio by adding additional data to the print data.

Growing community of inventors

Kanagawa, Japan

Masato Matsuduki