Browse Prior Art Database

End Cap for Photoconductor Drum

IP.com Disclosure Number: IPCOM000120238D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Chambers, DL: AUTHOR [+3]

Abstract

Disclosed is an end cap that can be permanently installed in a photoconductor drum. This end cap is specially designed to go through the manufacturing coating and curing process.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 86% of the total text.

End Cap for Photoconductor Drum

      Disclosed is an end cap that can be permanently installed
in a photoconductor drum.  This end cap is specially designed to go
through the manufacturing coating and curing process.

      The cap has five key features that allow it to be coated and
cured (see figure for details).

      A smooth transition from the end of the photoconductor core to
the end cap prevents an accumulation of coating fluid at this
interface.  A build up of coating fluid here will cause irregular
drying patterns and associated defects, especially on the charge
generation layer.

      An extended vertical side on the end cap allows adequate
surface area for coating fluids that do flow over the core/cap
interface to distribute uniformly into a smooth coating.

      A large radius on the outside diameter corner of the cap
prevents build-up and accumulation of coating fluid at this point.
This prevents a coating bead that will blister and form an irregular
pattern at the corner of the drum.

      A large flat surface on the bottom of the cap provides a means
of uniformly distributing the coating fluid that does flow to the
bottom of the cap.  This distribution area is adequately large and
horizontal so that it keeps the coating fluid in a thin, uniform
layer that will dry without causing blisters or thickness variations.

      A blind hole in the end cap bore provides for a gas trap that
builds up pressure as the drum is immersed...