Sharp Kabushiki Kaisha Corporation

Masato Kuze

Toshiki Takiguchi

Hiroyuki Murai

Hirokazu Yamauchi

Yuji Kumagai

Kazuhiro Matsuyama

Kohji Wakamoto

Cleaning performance of a cleaning pad for cleaning a charging wire is maintained so that the charging voltage of an image carrier by a charging wire is stabilized. A charging wire cleaning apparatus is provided with a cleaning pad for cleaning a charging wire which charges an image carrier, a slider which is a supporting body for supporting the cleaning pad, and a screw shaft which is a moving mechanism for reciprocating the slider in parallel to the charging wire. When the slider is at a predetermined position of the reciprocation range, the cleaning pad and the charging wire are separated, and the cleaning pad is adapted to be shifted with respect to the charging wire in this state.

Charging wire cleaning apparatus

In an image forming method, an electrostatic latent image formed on a surface of a photoreceptor is developed into a developer image with a developer, and a printing paper transported on a transfer belt is brought into contact with the surface of the photoreceptor so as to transfer the developer image onto the printing paper. The printing paper is transported in a proper transport direction, in which a projection generated in one direction on the printing paper as a result of cutting the printing paper in a printing paper manufacturing process does not face a surface of the transfer belt at a leading edge of the printing paper being transported on the transfer belt. In this way, even in the presence of the projection generated when the printing paper is cut, the printing paper naturally strips off from the surface of the photoreceptor, thereby preventing toner contamination caused by a striping claw in contact with the leading edge of the printing paper.

Image forming method and image forming apparatus

An image forming apparatus including: a cylindrical photoconductor; a laser scanning section for forming an electrostatic latent image on a peripheral surface of the photoconductor; an image development section for developing the electrostatic latent image by using a toner; a toner storage section for storing the toner to be supplied; and a transfer section for transferring the visualized image with use of the toner onto a printing sheet, wherein the image development section is disposed upstream of a rotation direction of the photoconductor from the transfer section, the toner storage section is disposed above the image development section while having a predetermined distance from the image development section so as to form a space therebetween for releasing heat, and the laser scanning section emits the scanning beam obliquely upwardly with respect to a horizontal direction so that the emitted scanning beam passes through the space and exposes the peripheral surface.

Image forming apparatus

In an image forming apparatus, an electrostatic latent image formed on a surface of a photoreceptor is developed into a toner image. A printing paper transported on a transport belt is brought into contact with the surface of the photoreceptor and an electric field is applied to the printing paper from a rear surface of the transport belt by a transfer roller to transfer the toner image onto the printing paper. The transfer roller applies different levels of electric field to the printing paper, so that a predetermined transfer electric field is applied to a region other than a leading edge of the printing paper being transported. An electric field weaker than the predetermined transfer electric field is applied to the leading edge. Even in the presence of a projection generated when the printing paper is cut, the printing paper naturally strips off from the surface of the photoreceptor.

Image forming apparatus, image forming method, and transfer device

A charging device includes a long electrode, a cleaning member, a timing device, a drive source, a load measuring device, and a control device. The drive source moves the cleaning member in the outward direction for a first time period after the outward passage time and then reverses the cleaning member in the homeward position. The load measuring device measures driving load imposed on the drive source while the cleaning member is being moved. The control device controls motion of the drive source to turn the cleaning member from the outward direction to the homeward direction at a predetermined objective point near the second end, based on sum of driving loads imposed on the drive source while the cleaning member is being moved from the first point to a second point located along the outward direction.

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Yamatokoriyama, Japan

Masato Kuze