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:
Jan. 11, 1994
Filed:
Feb. 18, 1992
Satoru Yoneda, Machida, JP;
Toshikazu Kawaguchi, Toyokawa, JP;
Abstract
An image forming apparatus having a rotatable image carrier, a first exposing device for forming an electrostatic latent image by irradiating an optical beam according to image data to the image carrier, a second exposing device to from another electrostatic latent image by irradiating an optical beam according to image data to the image carrier in a different irradiating position on the image carrier by the first exposing device, a developing device for developing the electrostatic latent images formed by the first exposing device and second exposing device, and a device for transferring the developed electrostatic images all together on the surface of a recording medium, has a device to form a first and a second pattern latent image on the image carrier by concurrently operating the first and the second exposing device while the image carrier is on the rotation at the first speed, a pattern detecting device for detecting the first and the second pattern latent image, a measuring device for measuring a time interval between the detection of the second pattern latent image and the detection of the first pattern latent image, and a controlling device for controlling an operation of exposing responding to image data of the first and the second exposing device on the basis of the time measured by the measuring device while the image carrier is on the rotation at the second speed.