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US 4,882,056 AGranted
Fluid filter element with an overlapped wrap
AssigneePall Corporation
InventorsPeter J. Degen, Colin F. Harwood
Life of this patent
Estimating the term…
Abstract
A fluid treatment element comprises a wrap spirally wound in successive overlapping windings about the external surface of a cartridge. The wrap has a portion contiguous to a portion of the external surface of the cartridge. A first adhesive is disposed between the external surface of the cartridge and the contiguous portion of the wrap. A second adhesive is disposed between overlapping windings of the wrap. An end cap is disposed over an end of the cartridge and is secured to the end of the cartridge and an end portion of the wrap. The fluid treatment element is applicable to various fields, including, for example, filtration, water demineralization, and gas treatment.
Claims21
A fluid treatment element comprising:
- a permeable cartridge comprising a substantially rigid fluid permeable tubular core and disposed thereon a cylindrical, nonwoven mass of polymeric microfibers substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement of the fibers, said cartridge having an external surface and an end;
- a permeable wrap spirally wound about and completely covering the external surface of the cartridge and having inner and outer surfaces, first and second edge portions, and an end portion, the second edge portion of the wrap overlapping the outer surface of the wrap and the inner surface of the wrap having a section contiguous to the external surface of the cartridge;
- first means for positively fastening the external surface of the cartridge to the contiguous section of the inner surface of the wrap;
- second means for positively fastening the outer surface of the wrap and the overlapping second edge portion of the wrap;
- and
- an end cap disposed at the end of the cartridge and including means for securing the end of the cartridge and the end portion of the wrap to the end cap.
3 more elements
A fluid treatment element comprising:
- a permeable cartridge comprising a substantially rigid fluid permeable tubular core and disposed thereon a cylindrical, nonwoven mass of polymeric microfibers substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement of the fibers, said cartridge having an external surface and an end;
- a permeable wrap having successive overlapping windings spirally wound about and completely covering the external surface of the cartridge;
- an end cap disposed at an end of the cartridge and including means for securing the end of the cartridge and the wrap to the end cap;
- and
- and means for positively fastening each individual winding both to the cartridge and to a previous lapped winding without substantially impairing the permeability of the wrap.
2 more elements
A fluid treatment element comprising:
- a permeable cartridge comprising a substantially rigid fluid permeable tubular core and disposed thereon a cylindrical, nonwoven mass of polymeric microfibers substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement of the fibers, said cartridge having an external surface and an end;
- a permeable wrap spirally wound about and completely covering the external surface of the cartridge and having inner and outer surfaces, first and second edge portions, and an end portion, the second edge portion of the wrap overlapping the outer surface of the wrap and the inner surface of the wrap having a section contiguous to the external surface of the cartridge;
- means for positively fastening the external surface of the cartridge to the contiguous section of the inner surface of the wrap;
- and
- an end cap disposed at the end of the cartridge and including means for securing the end of the cartridge and the end portion of the wrap to the end cap.
2 more elements
A fluid treatment element comprising:
- a permeable cartridge comprising a substantially rigid fluid permeable tubular core and disposed thereon a cylindrical, nonwoven mass of polymeric microfibers substantially free of fiber-to-fiber bonding and secured to each other by mechanical entanglement of the fibers, said cartridge having an external surface and an end;
- a permeable wrap spirally wound about and completely covering the external surface of the cartridge and having inner and outer surfaces, first and second edge portions, and an end portion, the second edge portion of the wrap overlapping the outer surface of the wrap and the inner surface of the wrap having a section contiguous to the external surface of the cartridge;
- means for positively fastening the outer surface of the wrap to the overlapping second edge portion of the wrap;
- and
- an end cap disposed at the end of the cartridge and including means for securing the end of the cartridge and the end portion of the wrap to the end cap.
2 more elements
Dependencies are inferred from the claim text.