|
(11) | EP 0 519 710 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||||||
| (54) | Image forming apparatus having image forming condition controller responsive to test pattern image |
| (57) An image forming apparatus includes an image bearing member movable along an endless
path; an electrostatic latent image forming device for forming an electrostatic latent
image on an image bearing member; a developing device for developing the latent image
with toner into a toner image; a transfer device for transferring the toner image
from the image bearing member onto a transfer material, wherein the latent image forming
device, the developing device and the transfer device are disposed in the order named
with respect to a direction of movement of the image bearing member during image formation;
a detection pattern image forming device for forming a predetermined pattern image
on the image bearing member; a detection pattern detecting sensor, disposed downstream
of the transfer means with respect to the movement direction of the image bearing
member and disposed faced to the image bearing member, for detecting a state of the
detection pattern; and controller for controlling an image forming condition of the
image forming apparatus in accordance with a detection by the sensor. |