SPONGE ROLL AND METHOD OF MANUFACTURING THE SAME

Title:

SPONGE ROLL AND METHOD OF MANUFACTURING THE SAME

Document Type and Number:

WIPO Patent Application WO/1999/034123

Kind Code:

A1

Abstract:

A sponge roll, such as a toner supply roll, a transfer roll, a cleaning roll, a developing roll and a charged roll which are used for a copier and a printer which utilize an electrophotographic system. The sponge roll has a shaft member, and an elastic sponge layer, at least a part of an outer circumferential surface of the shaft member being formed as a rough surface having a ten-point average roughness (Rz) of 5-300 $g(m)m, the elastic sponge layer being integrally molded with the shaft member on the outer circumference of the shaft member without interposing a layer of a bonding agent therebetween. Merely forming a specific rough surface on the shaft member and molding the shaft member and elastic sponge layer together enable a large adhesive strength to be obtained therebetween, so that the sponge roll can sufficiently deliver a higher operating speed and a higher durability required by an electrophotographic copier, the sponge roll requiring no layer of a bonding agent between the shaft member and elastic sponge layer, unlike a conventional sponge roll, whereby it becomes possible to prevent oozed-out bonding agent which causes contamination, and render troublesome steps, such as a bonding agent application step and a bonding agent drying step unnecessary, i.e., simplify the sponge roll manufacturing steps.

Inventors:

KONDO MITSUYOSHI (JP)
SHIRAKI KEITA (JP)

Application Number:

PCT/JP1998/005847

Publication Date:

July 08, 1999

Filing Date:

December 24, 1998

Export Citation:

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Assignee:

TOKAI RUBBER IND LTD (JP)
KONDO MITSUYOSHI (JP)
SHIRAKI KEITA (JP)

International Classes:

B29C44/02; B29C70/72; F16C13/00; G03G15/08; G03G15/16; G03G21/00; (IPC1-7): F16C13/00; B29D31/00; G03G15/08; G03G15/16

Foreign References:

JPH0592533U	1993-12-17
JPH0571436U	1993-09-28
JPH08179619A	1996-07-12
JPH06312848A	1994-11-08
JPS6382710A	1988-04-13

Other References: