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公开(公告)号：DE2861250D1
公开(公告)日：1981-12-10
申请号：DE2861250
申请日：1978-12-15
Applicant: IBM
Abstract: A xerographic copier includes a pre-clean corona (13) and a transfer corona (12). A developing station (14) employs carrier beads coated with tetrafluoroethylene, which material can film on to the drum. In order to reduce such filming, the pre-clean and transfer corona currents are adjusted to the same polarity and to levels, under a condition of operation of the machine in which no copy sheet is fed through the transfer station, which produce charge densities on the photoconductor element within 0.025 microcoulombs of each other.
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公开(公告)号：DE2960672D1
公开(公告)日：1981-11-19
申请号：DE2960672
申请日：1979-03-02
Applicant: IBM
Inventor： BERNARDELLI WILLIAM JAMES , BRANDON FRED YOUNG
IPC: G03G15/20
Abstract: A roll fuser for an electrostatic copier includes a pair of scraper blades (17 and 18) positioned in parallel along the backup roll to effect cleaning thereof. In order to increase the compliance of the blades, they include a plurality of slots (17b and 18b) extending from the scraping edge. The slots in the respective blades are offset to effect cleaning of the total area of the backup roll.
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