Ricoh Company, Ltd.

Shunsuke Hamahashi

Toshikane Nishii

Yoshitaka Sekiguchi

Makoto Matsushita

Masayuki Hayashi

Kohta Sakaya

An image forming apparatus includes a storage unit configured to store a recording medium; a conveyance unit configured to convey the recording medium from the storage unit; an image formation unit configured to perform an image formation for forming an image to be transferred onto the recording medium conveyed from the storage unit; and a detection unit configured to detect a start of the image formation. Upon the detection unit detecting the start of the image formation, the conveyance unit moves the recording medium by a predetermined distance from the storage unit.

Image forming apparatus and image forming method including pre-feeding of a recording medium

An image forming apparatus enables a high-quality double-side printing of a transfer medium by one-pass method using a simple structure. A latent image is formed and developed on an image carrier (drum) in a process cartridge. A resultant toner image is transferred by a first transfer unit (roller) onto either an upper surface of the transfer medium or a first intermediate transfer body (roller) in a first transfer area. The toner image on the first intermediate transfer body is transferred onto a back surface of the transfer medium in a fourth transfer area via a second intermediate transfer body (belt) and a third intermediate transfer body (roller). The fourth transfer area is located downstream of the first transfer area along a transport path of the transfer medium.

Double-sided one pass image forming apparatus

An image forming apparatus, forming a color image by successively superposing color images, formed on image carriers of corresponding image forming parts arranged along a rotational direction of an endless moving member, onto the endless moving member or a recording medium conveyed thereby, includes a first part causing a color registration pattern to be created on the endless moving member or the recording medium; a second part obtaining a color registration pattern signal by detecting the color registration pattern; a third part changing image formation timing in the image forming parts based on the color registration pattern signal; and a fourth part causing the endless moving member to rotate in forward and reverse directions after the creation of the color registration pattern. The second part obtains the color registration pattern signal by detecting the color registration pattern during each of the forward and reverse rotations of the endless moving member.

Image forming apparatus

An image forming apparatus includes a latent image forming part configured to form a latent image on an image carrier; a developing part configured to form a toner image by developing the latent image on the image carrier; a first transferring part configured to transfer the toner image on the image carrier to a surface of a transferring medium or a first intermediate transferring part; a second transferring part configured to transfer the toner image on the first intermediate transferring part onto a second intermediate transferring part; a third transferring part configured to transfer the toner image on the second intermediate transferring part onto a third intermediate transferring part; and a fourth transferring part configured to transfer the toner image on the third intermediate transferring part onto a rear surface of the transferring medium.

Image forming apparatus including storage device storing maximum length of transferring medium

An image formation apparatus configured to switch between an inter-leaf operation and a non-inter-leaf operation is provided for double-sided printing.

Image formation method and an image formation apparatus

A register roller conveys a recording sheet to a transfer position. A sheet feed roller conveys the recording sheet toward the register roller. A conveyance control unit controls rotation-start timings of the register roller and the sheet feed roller in such a manner that a rotation-start timing of the sheet feed roller is prior to a rotation-start timing of the register roller at a time of starting a registering process to convey the recording sheet to the transfer position at a right timing with the image formed on the image carrier.

Image forming apparatus, sheet-conveyance control method, and sheet-conveyance control program

An image forming apparatus includes a sheet mounting part for mounting plural sheets thereon, a sheet feeding part having a sheet feeding roller for feeding one of the plural sheets mounted on the sheet mounting part to a sheet conveying path by rotating the sheet feeding roller, a sheet detecting part for detecting the sheet fed by the sheet feeding part on the sheet conveying path, and a control part for controlling the rotation of the sheet feeding roller. The sheet feeding roller repeats an operation of rotating and stopping in a predetermined interval in accordance with the control of the control part during a period which begins when starting the feeding of the sheet and ends when detecting the sheet on the sheet conveying path.

Image forming apparatus and image forming method, and program

In an image forming method, an intermediate transfer body made of an endless flexible member is rotated, and an image is formed on a surface of a transfer member by undergoing a secondary transfer of a developer image onto a second transfer position from the intermediate transfer body to the transfer member, the developer image undergoing a primary transfer onto a first transfer position from an image carrier to a surface of the intermediate transfer body.

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Osaka, Japan

Shunsuke Hamahashi