Carrier web transfer device and method for electrophotographic printing press
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United States of America Patent
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-
Dec 31, 1991
Grant Date -
N/A
app pub date -
Dec 28, 1989
filing date -
Dec 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A transfer mechanism and method are provided for utilization in a high speed electrophotographic printing process of the type wherein the electrophotoconductive cylinder on which the image is formed travels at a peripheral speed of at least 100 ft./min. Transfer of the image is made to a continuous web of paper or the like travelling synchronously with the cylinder surface speed. A transfer corona focuses a narrow band of ions proximate the cylinder-web interface to attract at least 95% of the solids, toner particles from the cylinder to the travelling web. The charge on the transfer corona exceeds the charge on the image portions of the rotating cylinder by at least about 5,000 volts.
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