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Paper feed roller

a paper feed roller and paper feed technology, applied in the field of paper feed rollers, can solve the problems of paper powder accumulation, paper feed roller deterioration, paper feed roller failure, etc., and achieve the effect of preventing deterioration of friction coefficient, excellent paper feeding, and excellent paper feeding

Inactive Publication Date: 2014-03-27
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution effectively suppresses frictional coefficient deterioration and prevents conveyance failures, ensuring excellent paper feeding for a longer period without wear and tear issues.

Problems solved by technology

However, paper powder produced from paper easily adheres to the outer peripheral surface of the paper feed roller, and when the paper feed roller is repeatedly brought into contact with paper, paper powder is accumulated on the outer peripheral surface and deteriorates the frictional coefficient of the paper feed roller with respect to paper, and may cause a conveyance failure comparatively early.
In particular, when paper with a high ash content is used, the paper powder is easily produced, so that paper powder accumulation and a paper conveyance failure are easily caused.
However, based on the inventor's examination, conventional combined uses of rubber could not form a paper feed roller which hardly caused a paper conveyance failure when it was repeatedly brought into contact with paper.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

configuration example 1

of Rubber Composition

[0022]A rubber composition to be used as a material of the paper feed roller of the present invention uses, as rubber components, a combination of three kinds of EPDM, IR, and BR, and the mass ratio R1 of the three kinds of rubber components expressed by the following equation (1)′:

R1=MEPDM / (MIR+MBR)  (1)′

(in the equation, MEPDM represents the parts by mass of EPDM, MIR represents the parts by mass of IR, and MBR represents the parts by mass of BR) is set to be not less than 25 / 75 and not more than 75 / 25.

[0023]Accordingly, a paper feed roller which hardly causes deterioration in the frictional coefficient due to paper powder accumulation when the paper feed roller is repeatedly brought into contact with paper and an accompanying conveyance failure, and can keep excellent paper feeding for a longer period can be provided.

[0024]In the present invention, the mass ratio R1 of the three kinds of rubber components is limited to the above-described range for the follow...

configuration example 2

of Rubber Composition

[0057]The rubber composition to be used as a material of the paper feed roller of the present invention uses, as rubber components, three kinds of rubber components of EPDM, IR, and SBR in combination, and the mass ratio R1 of the three kinds of rubber components expressed by the following equation (1)″:

R1=MEPDM / (MIR+MSBR)  (1)″

(in the equation, MEPDM represents the parts by mass of EPDM, MIR represents the parts by mass of IR, and MSBR represents the parts by mass of SBR)

is set to be not less than 25 / 75 and not more than 75 / 25.

[0058]Accordingly, a paper feed roller which hardly causes deterioration in the frictional coefficient due to paper powder accumulation when it is repeatedly brought into contact with paper and hardly causes an accompanying conveyance failure, and can keep excellent paper feeding for a longer period, can be provided.

[0059]In the present invention, the mass ratio R1 of the three kinds of rubber components is limited to the above range for ...

example 1

[0097]60 parts by mass of oil-extended EPDM (Esprene 670F made by Sumitomo Chemical Co., Ltd. (rubber component:extender oil=100:100 (mass ratio) described above) (30 parts by mass of EPDM as a rubber component), 50 parts by mass of IR (Nipol IR2200 made by ZEON CORPORATION described above), and 20 parts by mass of BR (JSR BRO1 made by JSR Corporation described above) as rubber components, 3 parts by mass of dicumylperoxide (PERCUMYL (registered trademark) D made by NOF CORPORATION) as a peroxide cross-linking agent, 5 parts by mass of carbon black (HAF, trade name: SEAST 3 made by Tokai Carbon Co., Ltd.) as a stiffener / filler, and 20 parts by mass of paraffin oil (Diana (registered trademark) process oil PW-380 made by Idemitsu Kosan Co., Ltd.) were kneaded to prepare a rubber composition.

[0098]Then, the rubber composition was extrusion-molded into a cylindrical shape, and then press-vulcanized for 30 minutes at 160° C. to form a cylindrical material (cot) with an inner diameter of...

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Abstract

To provide a paper feed roller which hardly causes deterioration in the frictional coefficient due to paper powder accumulation and an accompanying paper conveyance failure, and can keep excellent paper feeding for a longer period.A paper feed roller 1 including a roller main body 2 made of a rubber composition which contains EPDM, IR, and BR or SBR as rubber components, where the mass ratio R1 of the three kinds of rubber components expressed by the following equation (1):R1=MEPDM / (MIR+Mx)  (1)(in the equation, MEPDM represents the parts by mass of EPDM, MIR represents the parts by mass of IR, and Mx represents the parts by mass of BR or SBR)is not less than 25 / 75 and not more than 75 / 25.

Description

CROSS REFERENCE[0001]The present application is a 37 C.F.R. §1.53 (b) divisional of, and claims priority to, U.S. application Ser. No. 12 / 955,647, filed Nov. 29, 2010. Priority is also claimed to Japanese Application No. 2009-273653 filed on Dec. 1, 2009 and Japanese Application No. 2009-273654 filed on Dec. 1, 2009. The entire contents of each of these applications is hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a paper feed roller to be used for paper feeding in static copying machines and various printers, etc.BACKGROUND ART[0003]For example, in paper feed mechanisms of electro-static copying machines, laser printers, plain paper facsimile machines, ink-jet printers, and automatic teller machines (ATM), etc., various paper feed rollers are installed. The paper feed roller rotates while being in contact with paper (including a plastic film, etc., the same applies to the following description) to convey the paper by friction. For example, f...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65H27/00
CPCB65H27/00C08K5/14C08L23/16G03G2215/00683B65H2401/111C08K5/01C08L9/00C08L7/00C08L9/06C08L2666/02C08L2666/08
Inventor ITO, YASUCHIKANISHIMORI, HIROKAZU
Owner SUMITOMO RUBBER IND LTD