Image forming apparatus
AssigneesHitachi, Ltd., Hitachi Printing Solutions, Ltd.
InventorsKenji Asuwa, Kazutaka Sato, Shigeru Obata, Yasushi Kinoshita, Akitomo Kuwabara, Tetsuya Ooba
Life of this patent
Estimating the term…
Abstract
An image forming apparatus is provided in which a misregistration of an image forming-position due to a tension, acting on a continuous recording medium, and a fluctuation thereof, is corrected with a low-cost construction to provide an image of high quality. A pair of recording medium speed detection devices are provided upstream and downstream of an image forming section, respectively, and a misregistration correction amount is calculated from a detected recording medium feed speed so as to correct the image forming position.
Claims4
An image forming apparatus comprising:
- a plurality of image forming units each including latent image-forming means for forming a latent image on an image-carrying member, developing means for causing a toner to adhere to said latent image, and transfer means for transferring said toner onto a continuous recording medium;
- and
- recording medium feed means for feeding said recording medium;
- wherein toner images, formed respectively by said plurality of image forming units, are transferred to said recording medium so as to form an image;
- and
- wherein a pair of recording medium feed speed detection means are provided upstream and downstream of an image transfer region, respectively, and there is provided image-forming position correction amount-outputting means for correcting a misregistration of an image recording position in the feed direction at said image transfer region in accordance with the speed detected by at least one of said pair of said recording medium feed speed detection means.
Dependencies are inferred from the claim text.