Pleated filter and method and apparatus for fabricating same

Details Pleated filter and method and apparatus for fabricating same Pleated filter and method and apparatus for fabricating same

B - Operations, Transporting

01

D

93/75, 183/94

B01D 27/06 (2006.01) B01D 29/11 (2006.01) B01D 39/16 (2006.01) B01D 46/52 (2006.01) B31D 5/00 (2006.01) B31F 1/20 (2006.01)

Patent

CA 1239880

ABSTRACT OF THE DISCLOSURE A filter for separating constituent components of fluids includes a plural-layer sheet-like member which is multiply pleated to provide layers of the same or different porosity or to provide structural support layers for pleating a soft or membrane-like filter layer. The multiple layers may be pre-joined or delivered from individual locations to a pneumatic conveyor passage of predetermined cross-section through which the adjacent layers are conveyed by a conveyor gas. The layers are crimped to form pleats by withdrawing the material at a lower linear speed than that at which it is supplied to the passage. Pleating is facilitated by venting the conveyor gas at a passage section of enlarged cross-section. The pleating material is subjected to a hot gas, such as steam, and then cooled by a cooling gas to effect bonding of the layers in the pleated state.

472110

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