Patent ID: 8162250
Filing Date: 2012-04-24
Classification: B21C,B65H

Abstract:
1. A belt-type band sheet coiling tension applying apparatus in which a coiling tension is applied to a plurality of band sheets to be coiled by a band sheet coiling apparatus so that each of the band sheets is moved toward the band sheet coiling apparatus, comprising: at least two sets of endless belts disposed oppositely upper and lower, each set of endless belts including a plurality of endless belts laterally arranged side by side, so as to nip both sides of each of the band sheets, each of the endless belts being driven by a friction engagement between each of the endless belts and each of the band sheets so as independently and circularly move integrally with each of the band sheets, wherein each of the endless belts includes an outer surface layer to be touched with the respective band sheets and an inner surface layer to be pressed so as to apply the coiling tension to the respective band sheets, and the outer surface layer and the inner surface layer are composed by different materials; a plurality of closely notched slits are provided at predetermined intervals over the entire peripheral length of each of the endless belts over the entire width in a width direction to a longitudinal direction of each of the endless belts, on the outer surface layer of each of the endless belts, wherein each of the plurality of closely notched slits is formed to have at least a pair of inner sides that closely contact each other such that there is no gap therebetween when the endless belt is in a flat surface state.