Oki Data Corporation

Oki Electric Industry Co., Ltd.

Hiroshi Rokugawa

Michiaki Haginoya

An image formation apparatus may include a voltage supply device configured to control a transfer voltage such that a first ratio of a first transfer voltage to a second transfer voltage, is greater than a second ratio of a third transfer voltage to a fourth transfer voltage, where the first transfer voltage is the transfer voltage for a first medium having a first thickness, a first resistance, and a first width, the second transfer voltage is for a second medium having the first thickness and the first resistance, and a second width larger than the first width, the third transfer voltage is for a third medium having a second thickness larger than the first thickness, a second resistance smaller than the first resistance, and the first width, and the fourth transfer voltage is for a fourth medium having the second thickness, the second resistance, and the second width.

Image formation apparatus, image formation method, and image formation program

An image forming apparatus includes a transfer unit having a conducive roller member formed with a conductive elastic body on an outer peripheral surface of a shaft of the conductive roller member for transferring, to a recording medium, development images formed on an image carrier based on a transfer voltage applied thereto, a voltage application unit for applying the transfer voltage to the transfer unit; a voltage control unit controlling the transfer voltage to be applied from the voltage application unit to the transfer unit, and a temperature measuring unit measuring shaft, temperature of the conductive roller member, wherein the voltage control unit controls the transfer voltage applied to the transfer unit based on the shaft temperature measured with the temperature measuring unit.

Image forming apparatus that uses temperature values to control transfer voltage applied to transfer unit of the apparatus

An image formation apparatus includes: image formation units each configured to form a developer image; an intermediate transfer body onto which the developer images formed by the respective image formation units are transferred; a secondary transfer member configured to transfer the developer images, which are transferred to the intermediate transfer body, onto a record medium using a voltage supplied to the secondary transfer member; and a voltage supply unit configured to supply a voltage to the secondary transfer member. Arrangement of the image formation units is changeable. Depending on the arrangement of the image formation units in a conveyance direction of the intermediate transfer body, the voltage supply unit changes a voltage to be supplied to the secondary transfer member.

Image formation apparatus that changes a voltage to secondary transfer units based on arrangement of image formation units

An image formation device comprises: a first image carrier for a first developer image; a second image carrier for a second developer image; an intermediate transfer body opposed to the first image carrier and the second image carrier; a first transfer unit to transfer the first developer image to the intermediate transfer body; a second transfer unit to transfer the second developer image onto the first developer image transferred onto the intermediate transfer body; a third transfer unit to transfer, to a recording medium, the first and second developer images transferred onto the intermediate transfer body; and a control unit to control a value of a voltage to be applied to each of the first and second transfer units, according to a type of the recording medium.

Image formation device

An image forming device has multiple image forming units that form developing agent images, an intermediate transfer member to which developing agent images are transferred from selected image forming units, and a transfer member for transferring the developing agent images from the intermediate transfer member to a recording medium, using a voltage supplied from a voltage supply unit. The voltage supply unit varies the voltage supplied to the transfer member, either before or after or both before and after the developing agent images are transferred from the intermediate transfer member to the recording medium, according to the number of selected image forming units or their disposition.

Growing community of inventors

Tokyo, Japan

Hiroshi Rokugawa