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A WEAR LIFE ENHANCED CLEANING BLADE DESIGN

IP.com Disclosure Number: IPCOM000027065D
Original Publication Date: 1995-Feb-28
Included in the Prior Art Database: 2004-Apr-07
Document File: 4 page(s) / 185K

Publishing Venue

Xerox Disclosure Journal

Abstract

The physical and geometrical changes observed in a blade, due to wear, is believed to be one of the drivers that causes the blade to lose it's cleaning efficiency. This poor service life can lead to frequent blade replacements. One approach to increasing cleaning blade life is to improve the blade wear rate.

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XEROX DISCLOSURE JOURNAL

A WEAR LIFE ENHANCED CLEANING BLADE DESIGN U.S. C1.355/299 Robert C. Yu
Richard L. Post

Proposed Classification

Int. C1. G03g 21/00

The physical and geometrical changes observed in a blade, due to wear, is believed to be one of the drivers that causes the blade to lose it's cleaning efficiency. This poor service life can lead to frequent blade replacements. One approach to increasing cleaning blade life is to improve the blade wear rate.

In the present invention, it is disclosed that using organichorganic filler blending for polyurethane cleaning blade wear life enhancements can eliminate frequent blade replacement. Experimentally it has been shown that a five percent weight loading of 50 organic / 50 inorganic filler blend, a 4 times polyurethane wear resistant improvement was achieved. Similarly, filler blend incorporation in the polyurethane significantly reduce the blade / SMTL (Small Molecule Transport Layer) contact friction by up to a factor of approximately 2 times. It should be emphasized that the lubricating effect of the organic particles in the blade is expected to produce an added benefit of reducing the photoreceptor belt's wear as well.

The mechanical properties of the polyurethane cleaning blade of the present invention are given as follows:

Shore A hardness Modulus

Mooney Rivlin Constants:

- - -

% Break Elongation -

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A WEAR LIFE ENHANCED CLEANING BLADE DESIGN(Cont'd)

The micro-crystalline is a finely divided Quartz particle having inherent wear resisting properties whereas, the organic filler particles have intrinsic lubricating characteristic capable of reducing the surface contact friction generated by blade / toner / photoreceptor mechanical interaction. The combination effect through blending these two types of particles (i.e. inorganic and organic) provides a highly effective wear resistant enhancement for cleaning blade incorporation. It is important to point out that the lubricating result of the organic particles in the blend will reduce the surface contact friction between the cleaning blade and the photoreceptor surface, therefore, it is expected to produce an added benefit of minimizing the photoreceptor belts wear as well.

Table I suggests that filler particulate blends in a polyurethane cleaning blade can substantially reduce it's frictional interaction against the AMAT photoreceptor belt during machine functions. When evaluated for wear against glass skid plates, filler reinforce polyurethane samples gave outstanding wear resistance compared to the control sample coun...