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Ding Ya-Jun Patents |
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Inventor: Ya-Jun; Ding
Address: Shanghai, CN
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 5402210 |
Dynamic developer bias control for use in an electrostatographic printing machine |
March 28, 1995 |
| A method and apparatus for providing a novel dynamic developer bias control system adapted to determine an optimal developer bias during the processing of the lead edge of an input document. Loss of image density for images on the lead edge of a document is minimized by varying the d |
| 5400122 |
Non-linear selectively variable copy contrast adjustment device |
March 21, 1995 |
| An electrostatographic printing apparatus adapted to provide selectively variable copy contrast, including a movable control member and a system for providing non-linearly variable contrast control in response to selective displacement of the control member, the control member having |
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