Pleated filter and a method for making the same

Details Pleated filter and a method for making the same Pleated filter and a method for making the same

B - Operations, Transporting

01

D

93/75, 183/94

B01D 27/06 (2006.01) B01D 29/11 (2006.01) B01D 46/24 (2006.01) B01D 46/52 (2006.01)

Patent

CA 2215992

The present invention relates to a filter including a filter element having a succession of inner connected pleats. The pleats have successive pleat tips which define an outer boundary of the filter element. Covering the entire outer boundary of the filter element is a permeable generally inelastic sheet which extends across successive pleat tips. The sheet is adhesively affixed to the pleat tips for maintaining spacing of the pleats. The sheet comprises a plurality of randomly arranged plastic filaments which are bonded to each other junction between the filaments and define a plurality of randomly spaced and shaped openings for allowing substantially unrestricted flow of a fluid through the sheet.

Filtre comportant un élément de filtre constitué d'une succession de plis intérieurs jointifs. Ces plis comportent des extrémités de plis qui définissent une limite extérieure de l'élément de filtre. La totalité de la limite extérieure de l'élément de filtre est recouverte par une feuille perméable de façon générale inélastique s'étendant le long des extrémités de plis successives. Cette feuille est fixée de façon adhésive aux extrémités de plis, et maintient l'espacement de ceux-ci. La feuille est constituée d'une pluralité de filaments de plastiques disposés de façon aléatoire et liés entre eux au niveau de points de jonction entre les filaments et définissant une pluralité d'ouvertures à l'espacement et à la forme aléatoires, ce qui permet l'écoulement sensiblement libre d'un fluide à travers la feuille.

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