US 2010/0061748 A1 · Exposure Timing Determining Method and Image-Forming Apparatus

Abstract

A toner image on a photosensitive drum exposed with an LED light beam radiated from an LED section and developed by an image-forming unit is transferred by an image-forming apparatus to a printing paper when the printing paper, which is fed from a paper feed tray or a manual feed tray and which is transported by a transport mechanism by a feeder section, passes through a process section. A control unit of the image-forming apparatus determines an exposure timing at which the LED section starts the exposure, depending on a supply source of the printing paper sheet to be subjected to the transfer by the process section. Therefore, the error of the photosensitive member arrival time, which is caused by the change of the transport route, is absorbed, and the deviation of the transfer start position, which results from the error, is suppressed.

Claims11

Dependent claims

An exposure timing determining method for determining an exposure timing in an image-forming apparatus, the image-forming apparatus including an exposure section which forms an electrostatic latent image on a photosensitive member by exposing the photosensitive member at a predetermined exposure timing;

a plurality of supply sections from each of which a recording medium is supplied to the photosensitive member;
and a development and transfer mechanism in which a developing agent is electrostatically attracted to the electrostatic latent image formed by the exposure section, and which transfers the developing agent electrostatically attracted to the electrostatic latent image to the recording medium transported to the photosensitive member from each of the plurality of supply sections, the exposure timing determining method comprising:
detecting a supply section, among the plurality of supply sections, from which the recording medium is supplied;
and
determining the predetermined exposure timing depending on the detected supply section.

2 more elements

An image-forming apparatus which forms an image on a recording medium, comprising:

an exposure section which forms an electrostatic latent image on a photosensitive member by exposing the photosensitive member at a preset exposure timing;
a plurality of supply sections from each of which a recording medium is supplied to the photosensitive member;
a development and transfer mechanism which causes a developing agent to be electrostatically attracted to the electrostatic latent image formed by the exposure section, and which transfers the developing agent electrostatically attracted to the electrostatic latent image to the recording medium transported to the photosensitive member from each of the plurality of supply sections;
and
a timing-determining section which determines the exposure timing depending on a supply section, among the plurality of supply sections, from which the recording medium is supplied.

2 more elements

Dependencies are inferred from the claim text.

Exposure Timing Determining Method and Image-Forming Apparatus

Life of this patent

Exposure Timing Determining Method and Image-Forming Apparatus

Life of this patent

Abstract

Claims11