IMAGE FORMING APPARATUS

摘要

To accomplish precise correction of the position of the toner image formed by the image forming station, in the device using the two-component developer.;An electrostatic latent image for forming a color misregistration correction pattern 9 for color misregistration correcting includes a first latent image pattern 301 and a second latent image pattern 302 at the position downstream of the first latent image pattern 301 with respect to the moving direction of the electrostatic latent image. The toner image resulting from the development of the first latent image pattern has a width, measured in the image moving direction, which is larger than that of the toner image resulting from the development of a latent image pattern alone which is the same as the first latent image pattern, or the toner image resulting from the development of the first latent image pattern has an image density in downstream end portion with respect to the moving direction, which density is higher than that of the toner image resulting from the development of the latent image pattern alone which is the same as the first latent image pattern.

主权项

1. An image forming apparatus comprising:
a plurality of image forming stations configured to form respective toner images; said image forming station each including a rotatable image bearing member, a latent image forming device configured to form an electrostatic latent image on said image bearing member, and a developing device configured to develop the electrostatic latent image formed on said image bearing member, said developing device including a developer carrying member configured to carry a developer comprising toner and a carrier and movable in the same direction at a position where said developer carrying member is opposed to said image bearing member; a toner sensor configured to detect a toner image for registration correction of images formed by said image forming stations: a controller capable of executing a operation in a mode for correcting a writing position of the images formed by said image forming stations on the basis of a result of detection of the toner images for the registration correction by said toner sensor, wherein in the operation in the mode, said controller effects the control such that in forming a first latent image pattern which is a latent image for the toner image for the registration correction, a second latent image pattern is formed at least in an upstream side of the first latent image pattern except for the downstream side thereof with respect to a moving direction of the image, and said controller controls a formation position of the second latent image pattern such that the toner image resulting from the development of the first latent image pattern has a width, measured in the image moving direction, which is larger than that of the toner image resulting from the development of a latent image pattern alone which is the same as the first latent image pattern, or the toner image resulting from the development of the first latent image pattern has an image density in downstream end portion with respect to the moving direction, which density is higher than that of the toner image resulting from the development of the latent image pattern alone which is the same as the first latent image pattern.