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Disclosed is a device and process for coating a seamless photoconductor drum, such as those used in a laser printer.
English (United States)
This text was extracted from a PDF file.
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Coating of Photoconductor Drum using a Hydraulic Ring Head
Disclosed is a device and process for coating a seamless photoconductor
drum, such as those used in a laser printer.
The process uses a ring-shaped coating head. A drum core is passed
through the ring coating head with an annular gap of known thickness. Ink under
pressure is supplied to the gap. Hydraulic pressure exerted by the ink centers
the drum. The thin coating is formed when the drum core moves out of the
sleeve. The gap thickness, ink viscosity and the speed of motion determine the
desired thickness. Sequential processes with on-line drying can be used for
coating a multi-layered photoconductor drum.