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METHOD FOR REDUCING OZONE CONCENTRATION IN XEROGRAPHIC COPYING MACHINE

IP.com Disclosure Number: IPCOM000022802D
Original Publication Date: 1976-Feb-29
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 225K

Publishing Venue

Xerox Disclosure Journal

Abstract

Ozone generated by corona devices in xerographic copying machines is typically blown out of the machine by a blower. Typically, ozone decomposing filters located at the exhaust portion of the machine are used for ozone control, However, this type of ozone control system requires the use of high capacity blowers which are noisy and expensive. In addition, these blowers are large and, therefore, present a space pro- blem.

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XEROX DISCLOSURE JOURNAL

METHOD FOR REDUCING OZONE Proposed Classification
CONCENTRATION IN XEROGRAPHIC U.S. Cl. 96/ll9R
COPYING MACHINE Int. Cl, G03c
R. R. Thettu
D. Bierworth

Ozone generated by corona devices in xerographic copying
machines is typically blown out of the machine by a blower.
Typically, ozone decomposing filters located at the exhaust
portion of the machine are used for ozone control, However,
this type of ozone control system requires the use of high
capacity blowers which are noisy and expensive. In addition,
these blowers are large and, therefore, present a space pro-
blem.

These problems can be avoided by using a catalytic-type
material such as Hopcalite, which decomposes ozone into
oxygen by doing the following: (1) Coat the inner walls of
the vacuum transport's manifold with an ozone decomposing
material such as Hopcalite. (2) Coat the exhaust blower's
rotor walls with the ozone decomposing Hopcalite material.
(3) Install a rotating blade-type free-wheeling member in
the vacuum transport with an ozone-decomposing Hopcalite
coating.

Hopcalite is a catalytic-type material which decomposes
ozone into oxygen and which will not get exhausted in the
process. Therefore, by coating the walls of the vacuum
manifold and rotor of the blower with Hopcalite, there is a
substantial reduction in ozone. The vacuum transport walls
are kept turbulent by a Hopcalite-coated freely-rotating
blade, This keeps the walls clean and effective in ozone
decomposition. The Hopcalite is coated o...