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LUBRICANTLESS DOCTOR BLADE FOR CLEANING ELECTROSTATOGRAPHIC IMAGING SURFACES

IP.com Disclosure Number: IPCOM000023442D
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-30
Document File: 2 page(s) / 270K

Publishing Venue

Xerox Disclosure Journal

Abstract

Present doctor blades use elastomers as the cleaning tip or for the complete cleaning blade in order to provide sufficient compliance between the blade edge and the imaging surface for removing the residual toner therefrom. In accordance with these prior blades, blade wear is reduced to a great extent when the blade tip rides on a toner or particulate additive seal, If the elastomeric blade edge makes direct contact with the imaging surface, massive wear and tuck unders tend to occur,

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XEROX DISCLOSURE JOURNAL

LUBRICANTLESS DOCTOR BLADE FOR
CLEANING ELECTROSTATOGRAPHIC
IMAGING SURFACES
Stephen Strella

Proposed Classification
U.S~ Cl. 355/15
mt. Cl. G03g 21/00

Present doctor blades use elastomers as the cleaning tip or
for the complete cleaning blade in order to provide sufficient
compliance between the blade edge and the imaging surface for
removing the residual toner therefrom. In accordance with
these prior blades, blade wear is reduced to a great extent
when the blade tip rides on a toner or particulate additive
seal, If the elastomeric blade edge makes direct contact with
the imaging surface, massive wear and tuck unders tend to
occur,

An alternative blade construction 1 is proposed which should
eliminate the need, for a particulate additive or toner seal.
A thin metal or plastic shim 2 provides the cleaning edge. The
shim 2 is made thin enough to be laterally compliant so as to
conform to the waviness of the imaging surface 3. Since the
shim 2 is made of plastic or metal which is relatively hard, it
would not be expected to wear out. The hardness of the metal or
plastic shim 2 could be chosen to actually wear the imaging
surface 3 at a slow rate in order to renew the surface.

The metal or plastic shim 2 is supported by an elastomeric
body 4 which provides the low beam modulus needed to control
and minimize loading forces at the blade edge and also to
provide ease of manual handling and setting of the blade,

3

Volume 2 Number 5 September/October 1977 107

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