Filter fabrics

Details Filter fabrics Filter fabrics

B - Operations, Transporting

01

D

B01D 39/08 (2006.01) B01D 25/00 (2006.01) B01D 25/176 (2006.01) B29C 53/02 (2006.01)

Patent

CA 2081544

ABSTRACT IMPROVEMENTS TO FILTER FABRICS A method of forming a barrel neck connection between filter cloths (22, 23) for application to an apertured press plate is proposed, the method involving the steps of creating an aperture (13) in a flange-forming fabric having thermoplastic properties, heating the fabric in a region extending about the said aperture (13), and displacing the fabric in such region to form an outwardly extending tube (18) for telescoping engagement with a corresponding tube formed in a second flange-forming fabric arranged in opposed disposition with respect thereto. Displacement of the fabric is ordinarily effected by a plug (15) which is brought into contact with the fabric (11) and is moved into progressive engagement with a through hole (16) in a support (12) supporting the fabric (11) the plug (15) being heated and serving to heat the flange-forming material in the relevant region thereof. The flange-forming material may itself comprise a filter cloth. (Figs. lc and 3).

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