Browse Prior Art Database

Mesa Ceramic Roller

IP.com Disclosure Number: IPCOM000113239D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Sawa, T: AUTHOR [+2]

Abstract

The disclosure is aimed at changing the shape of the tip of the ceramic abrasive grain which is coated on the surface of the paper feed roller to that of a mesa so that a paper feed roller exhibits a high coefficient of friction while maintaining transcription prevention ability and semipermanent paper feed force, both characteristics of ceramic rollers.

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Mesa Ceramic Roller

      The disclosure is aimed at changing the shape of the tip of the
ceramic abrasive grain which is coated on the surface of the paper
feed roller to that of a mesa so that a paper feed roller exhibits a
high coefficient of friction while maintaining transcription
prevention ability and semipermanent paper feed force, both
characteristics of ceramic rollers.

      After fixing ceramic abrasive grain -- which has the
characteristics of being uniform and very fine in roughness -- by
bonding onto the perimeters of the feed roller, dressing is applied
onto the tip of the ceramic abrasive grain thus changing the shape of
the tip to that of a mesa; by doing so, the surface of the area
touching the paper is increased and the depth by which each grain
sinks into the paper is decreased, thereby increasing the feed force,
decreasing the occurrences of paper dust during paper feed, and
making it difficult to damage the paper.  This feed roller is shown
in the Figure.

      When changing the tip of the ceramic abrasive grain to that of
a mesa, since the perimeters of the roller is dressed, it is possible
to finish the perimeter of the paper feed roller with high accuracy
thereby allowing paper documents to be fed through with high
accuracy.  Ceramic grains may include 1) Silicon carbide; 2) Alumina;
3) Artificial diamond; etc.  For this paper feed roller, Silicon
carbide was used when taking into considering material hardness and
low price.

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