Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums
Reexamination Certificate
2005-07-12
2005-07-12
Savage, Matthew O. (Department: 1723)
Liquid purification or separation
Filter
Supported, shaped or superimposed formed mediums
C210S489000, C210S497010, C210S498000, C210S499000, C209S395000
Reexamination Certificate
active
06915910
ABSTRACT:
A pulp screen cylinder that includes screen media releasably engaged with a frame at spaced locations opposing movement of the media away from the frame during screening. A preferred frame includes a plurality of spaced engaging structures that releasably engage screen media. A preferred frame includes an arrangement of flow windows that are triangular or rhomboid. A preferred method includes producing a frame cylinder by centrifugal casting and machining flow windows using a jet cutting process. A preferred screen media has a plurality of spaced apart engaging structures that each releasably engages the frame at spaced apart locations. A preferred screen media is of wedgewire construction having engaging structure carried by a plurality of spaced wire retaining clips. A preferred clip has vee-shaped rounded slots and an arm thicker than an end wall. A preferred engaging structure includes a projection that has a lip or hook for releasable interlocking engagement.
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Cromell Tim J.
Lutz Mark S.
Boyle Fredrickson Newholm Stein & Gratz S.C.
J&L Fiber Services, Inc.
Savage Matthew O.
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