Wrap member having openings

Details Wrap member having openings Wrap member having openings

1991-07-22

1993-10-12

Drodge, Joseph W.

Liquid purification or separation

Plural distinct separators

Filters

55487, 55521, 210487, 210489, 2104931, 2104935, 2104934, B01D 2956

Patent

active

052522075

ABSTRACT:
A filter includes a pleated filter element having longitudinally extending pleats and a wrap member wrapped around the filter element. The wrap member is joined to the peaks of the pleats and has openings for increasing the dirt capacity of the filter. The filter element may be a composite of a filter layer, upstream and downstream support and drainage layers, a cushioning layer between the upstream support and drainage layer and the filter layer, and polymeric beads on the downstream side of the downstream support and drainage layer. An extruded polymeric mesh may comprise one or both of the upstream and downstream support and drainage layers.

REFERENCES:
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A series of drawings of "substrate media" with the description P14 (Reemay 2016) media @10.900 Slit Width With Hotmelt (Henkel 6300) Beads Hotmelt Bead Dia. .014 (Ref.) Hotmelt Bead Spacing .300 Centers, dated Jul. 14, 1987 and May 21, 1987.
A letter from Dr. Staffan Linnersten explaining the circumstances of the sales and the nature of the product which was not immediately apparent from the drawings listed above, dated Jun. 12, 1989.

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