US 5,995,802 A · Image forming apparatus

Abstract

An image forming apparatus which forms toner images of different colors by at least one image forming device with a rotatably driven image bearing member, and forms a picture by transferring the different colored toner images formed by the image forming device onto an image transfer medium supported on a rotatably driven endless bearing member, or directly onto the endless bearing member, the image forming apparatus wherein a latent image writing position on the image bearing member being angularly spaced by approximately 180.degree. from an image transfer position including: a pattern detecting mechanism for detecting a color misregistration detecting pattern formed on the endless bearing member; and a drive control mechanism for individually controlling rotation speeds of rotary members, such as the image bearing member and the endless bearing member, so as to suppress a periodical rotation variation by using detecting information of a vibration component on the periodical rotation variation, which is obtained from detecting signals derived from the pattern detecting mechanism.

Claims21

Dependent claims

An image forming apparatus which forms a monocolor toner image by an image forming means with a rotatably driven image bearing means, and forms a picture by transferring the monocolor toner image formed by said image forming means onto an image transfer medium transported by a roll pair, an image transfer medium carried on an endless bearing means, or directly onto said endless bearing means,

said image forming apparatus wherein a latent image writing position on said image bearing means being angularly spaced by approximately 180.degree. from an image transfer position comprising:
pattern detecting means for detecting an image misregistration detecting pattern formed on said image transfer medium or said endless bearing means;
and
drive control means for individually controlling a rotation speed of said rotary means, such as said image bearing means or said endless bearing means, so as to suppress a periodical rotation variation of said rotary means by using detecting information of a vibration component on the periodical rotation variation, which is obtained from detecting signals derived from said pattern detecting means.

1 more element

An image forming apparatus which forms toner images of different colors by at least one image forming means with a rotatably driven image bearing means, and forms a picture by transferring the different colored toner images formed by said image forming means onto an image transfer medium supported on a rotatably driven endless bearing means, or directly onto said endless bearing means,

said image forming apparatus wherein a latent image writing position on said image bearing means being angularly spaced by approximately 180.degree. from an image transfer position comprising:
pattern detecting means for detecting a color misregistration detecting pattern formed on said endless bearing means;
and
drive control means for individually controlling rotation speeds of rotary means, such as said image bearing means and said endless bearing means, so as to suppress a periodical rotation variation by using detecting information of a vibration component of the periodical rotation variation, which is obtained from detecting signals derived from said pattern detecting means.

1 more element

Dependencies are inferred from the claim text.

Image forming apparatus

Life of this patent

Image forming apparatus

Life of this patent

Abstract

Claims21