Loading patent…
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorTatsuya Funakoshi
Estimating the term…
When power is turned on in an apparatus, respective units and devices in the apparatus such as a heat roller of a fixing device are initialized and a scanning position control is performed by which positional errors in a main scanning direction and in a sub-scanning direction of a plurality of light beams are converged to respective predetermined values or less, and the apparatus is brought into a standby state. In this standby state, a control between sheets is performed every several seconds, for example. The control between sheets means a control of changing a beam position, for example, in the sub-scanning direction by a minimum amount of adjustment, if necessary. In this manner, the beam position in the sub-scanning direction is always controlled at an optimum position and when a copy start button is pressed down, a copying operation can be immediately started.
A method of controlling an light beam scanning position in a multi-beam image forming apparatus in which a photosensitive drum is simultaneously scanned with and exposed to a plurality of light beams to form an electrostatic latent image on the photosensitive drum, the method comprising the steps of:
A method of controlling an light beam scanning position in a multi-beam image forming apparatus in which a photosensitive drum is simultaneously scanned with and exposed to a plurality of light beams to form an electrostatic latent image on the photosensitive drum, the method comprising the steps of:
A multi-beam image forming apparatus in which a photosensitive drum is simultaneously scanned with and exposed to a plurality of light beams to form an electrostatic latent image on the photosensitive drum, the apparatus comprising:
Dependencies are inferred from the claim text.