Browse Prior Art Database

SHOE WEAR INDICATOR

IP.com Disclosure Number: IPCOM000023400D
Original Publication Date: 1977-Aug-31
Included in the Prior Art Database: 2004-Mar-30
Document File: 2 page(s) / 160K

Publishing Venue

Xerox Disclosure Journal

Abstract

In copying machines employing a magnetic brush development system, drum-to-roll spacing is maintained by the use of plas-tic shoes, Disclosed in the figure is a modification to the plastic shoes that will provide an indication to an observer of excessive wear. The modification comprises a hole molded in the shoe leaving a thin wall at the bottom of the shoe. A drop of high melting temperature red wax is poured into the hole. When the wall at the bottom of the shoe wears away the red wax will become visible which indicates to an observer that the shoe needs to be replaced.

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XEROX DISCLOSURE JOURNAL

SHOE WEAR INDICATOR
ProposedAn Bar-on Classification

U.S. Cl. 116/114Q
mt. Cl. GOld 13/00

In copying machines employing a magnetic brush development
system, drum-to-roll spacing is maintained by the use of plas-
tic shoes, Disclosed in the figure is a modification to the
plastic shoes that will provide an indication to an observer
of excessive wear. The modification comprises a hole molded
in the shoe leaving a thin wall at the bottom of the shoe. A
drop of high melting temperature red wax is poured into the
hole. When the wall at the bottom of the shoe wears away the
red wax will become visible which indicates to an observer
that the shoe needs to be replaced.

Volume 2 Number 4 July/August 1977 27

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Page 2 of 2

                 XEROX DISCLOSURE JOURNAL
28 Volume 2 Number 4 July/August 1977

[This page contains 1 picture or other non-text object]