- Patent Title: Lead edge offset correction for intermediate transfer drum imaging
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Application No.: US17490450Application Date: 2021-09-30
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Publication No.: US11868058B2Publication Date: 2024-01-09
- Inventor: Patricia J. Donaldson , Jack T. Lestrange
- Applicant: Xerox Corporation
- Applicant Address: US CT Norwalk
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: US CT Norwalk
- Agency: Caesar Rivise, PC
- Main IPC: G03G15/01
- IPC: G03G15/01 ; G03G15/00 ; B41J2/005

Abstract:
An apparatus and method for compensating for variation of the image placement for each color station in an intermediate transfer drum system. A sensor detects the image placed by the previous station and triggers the imaging on the drum such that it properly registered to the previous image. However, the variation of the drum's radius results in runout which creates an error in the image placement, since the surface drum travel will be larger or smaller than expected. The method to correct for a lead edge offset for radial runout involves dividing the drum into regions and calculating an offset center of each region. As the drum transitions from region to region the offset value is updated to determine when to start imaging for proper placement on the sheet. The offset can be derived from the image runout to find the distance traveled from the transfer point or can be measured directly from color-to-color registration variation.
Public/Granted literature
- US20230288832A1 LEAD EDGE OFFSET CORRECTION FOR INTERMEDIATE TRANSFER DRUM IMAGING Public/Granted day:2023-09-14
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