ROS assisted toner patch generation for use in tri-level imaging
AssigneeXerox Corporation
InventorsMark A. Scheuer, Daniel W. MacDonald
Life of this patent
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Abstract
Toner patch generation for use in tri-level imaging is effected using a laser ROS. Two toner patches are formed using a single toner patch generator of the type commonly used in the prior art. The patch generator, used by itself serves to form one toner patch latent image and together with the ROS exposure device of the imaging apparatus is used to form the other toner patch latent image.
Claims32
In a method of creating tri-level images on a charge retentive surface, the steps including:
- uniformly charging said charge retentive surface;
- using a test patch generator, forming a first test patch on said charge retentive surface;
- using an image exposure structure utilized for forming tri-level images and said test patch generator, forming a second test patch on said charge retentive surface.
Apparatus for creating tri-level images on a charge retentive surface, said apparatus comprising:
- means for uniformly charging said charge retentive surface;
- a test patch generator for forming a first test patch on said charge retentive surface;
- and
- exposure structure for forming tri-level images;
- said test patch generator and said exposure structure cooperating to form a second test patch area.
Apparatus according to claim 28 wherein said test patch generator comprises means for discharging a predetermined section of one of said areas to a voltage level intermediate a first image voltage level and a background voltage level
Apparatus according to claim 26 wherein said image exposure structure comprises a laser ROS.
Dependencies are inferred from the claim text.