Patent ID: 7448610
Filing Date: 2008-11-11
Classification: B65H

Abstract:
1. A paper-feeding roller comprising a core and an annular elastic member mounted on a peripheral surface of said core, wherein said annular elastic member has a three-layer construction composed of a non-foamed inner layer having a JIS-A hardness of 1 to 10 degrees and a thickness of 2 to 10 mm; a non-foamed intermediate layer having a JIS-A hardness of 30 to 80 degrees and a thickness of 0.05 to 0.2 mm; and a non-foamed outer layer having a JIS-A hardness of 25 to 60 degrees and a thickness of 1 to 3 mm; said inner layer being made of rubber composition containing not less than 25 to 70 parts by weight of a carbon black and 150 to 300 parts by weight of a paraffin oil for 100 parts by weight of an ethylene-propylene-diene rubber (EPDM rubber); and said outer layer being made of rubber composition containing not less than 25 to 70 parts by weight of a mineral inorganic filler and not more than 300 parts by weight of a paraffin oil for 100 parts by weight of a EPDM rubber.