The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1999
Filed:
Nov. 06, 1997
Katsuyuki Ito, Tokyo, JP;
Toshiro Murano, Tokyo, JP;
Oki Data Corporation, Tokyo, JP;
Abstract
An electrophotographic image forming apparatus has a photosensitive drum; a charging device for charging a surface of the photosensitive drum; an LED array for projecting a light beam on the surface of the photosensitive drum, thereby forming irradiated spots constituting an electrostatic latent image. The irradiated spots are formed on intersections of a grid which is composed of a plurality of first lines extending in a main-scanning direction and arranged at equal first intervals and a plurality of second lines extending in a sub-scanning direction and arranged at equal second intervals. The apparatus also has a developing device for attaching a toner particle extending to each of the irradiated spots, a transfer device for transferring the toner particle to a transfer material, and a fixing device for fixing the toner particle on the transfer material. A diameter of the toner particle is determined in such a way that a diameter of a fixed toner particle is equal to approximately a length of a diagonal line of the grid. Further, the diameter of the toner particle in the developing device is in a range of 0.7 times to 1.0 times as long as the first interval and/or the second interval.