| 摘要 |
PURPOSE:To double the tensile strength of a filter cloth and to improve remarkably the strength shortage of the connection part and fitting part of the filter cloth by making a tension to be applied respectively on the folded upper and lower filter cloth at the folding end of the filter cloth. CONSTITUTION:In case of a filter cloth 2 being pulled as per the arrow mark (a), a linear body 1 is pulled as well in the same direction at the connection part. In this case, a rupture force is acted on the upper and lower parts of the filter cloth 2 where the linear body 1 is inserted into. The rupture of the filter cloth 2 is prevented because of the core wire 3 thereof to support the linear body 1 when the rupture is progressed to the part of the core wire 3 even if the filter cloth 2 is ruptured by the linear body 1. Namely, due to the core wire 3 coming into contact with the filter cloth 2 by its whole face in longitudinal direction its face corresponding to the tensile is widened and sufficiently resistant to the tension. The connection release of the connection part can be performed simply by the pulling and insertion of the core wires 3, 3'. |
