Electrostatic charging member and photoconductor device
First Claim
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1. A charging member for electrically charging an object by placing the member in contact with the object and applying voltage between them, the surface of the charging member in contact with the object having a microhardness of up to 65 degrees.
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Abstract
A charging device for electrically charging a photoconductor drum includes a charging member adapted to be placed in contact with the drum and an element for applying voltage between the charging member and the drum. The charging member has a microhardness of 1-65 degrees at its surface in contact with the drum or at least a surface layer of the charging member in contact with the drum is formed of a polyurethane which is prepared from liquid MDI as an isocyanate component and a polyol.
34 Citations
14 Claims
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1. A charging member for electrically charging an object by placing the member in contact with the object and applying voltage between them, the surface of the charging member in contact with the object having a microhardness of up to 65 degrees.
- 2. A charging member for electrically charging an object by placing the member in contact with the object and applying voltage between them, the surface of the charging member in contact with the object being formed of a polyurethane whose isocyanate component is liquid MDI.
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8. A charging device for electrically charging an object comprising a charging member adapted to be placed in contact with the object and means for applying voltage between said charging member and the object,
the surface of said charging member in contact with the object having a microhardness of up to 65 degrees.
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9. A charging device for electrically charging an object comprising a charging member adapted to be placed in contact with the object and means for applying voltage between said charging member and the object,
the surface of said charging member in contact with the object being formed of a polyurethane whose isocyanate component is liquid MDI.
Specification