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US 5,904,846 AGranted
Filter cartridge having track etched membranes and methods of making same
AssigneeCorning Costar Corporation
InventorsJames G. Clements, William Stephen Macomber, Suzanne Surprenant
Life of this patent
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Abstract
A filter cartridge that includes a track etched membrane sealed therein in a leak-free manner, and a method for making the cartridge. The filter cartridge has a bubble point that is at least 50% of the bubble point of the track etched membrane. In one embodiment, the method includes disposing the track etched membrane below a heat source and orienting the membrane so that it melts back on itself, and then allowing the membrane to cool to form a leak-free seal.
Claims79
A filter cartridge including a pleated track etched membrane sealed therein in a leak-free manner, wherein the track etched membrane includes a plurality of pores and at least one shadow region that is free of pores.
A filter cartridge, comprising:
- a cartridge body;
- a polyester track etched membrane, disposed within the cartridge body that is arranged to form a filter element having an interior including at least one end;
- and
- at least one leak-free seal that closes the at least one end of the interior of the filter element,
- wherein the track etched membrane is encapsulated by the at least one leak-free seal;
- wherein the cartridge body includes a cage and at least one endcap, wherein the track etched membrane is disposed within the cage, and wherein the at least one leak-free seal is formed between the track etched membrane and the at least one endcap;
- wherein the track etched membrane is formed from a first material and the at least one endcap is formed from a second material, and wherein the at least one leak-free seal includes only the first and second materials.
4 more elements
A filter cartridge, comprising:
- a cartridge body;
- a polyester track etched membrane disposed within the cartridge body that is arranged to form a filter element having an interior including at least one end;
- and
- at least one leak-free seal that closes the at least one end of the interior of the filter element,
- wherein the track etched membrane is encapsulated by the at least one leak-free seal;
- wherein the cartridge body includes a cage and at least one endcap, wherein the track etched membrane is disposed within the cage, and wherein the at least one leak-free seal is formed between the track etched membrane and the at least one endcap;
- wherein the track etched membrane and the at least one endcap are formed from a single material, and wherein the at least one leak-free seal includes only the single material.
4 more elements
A filter cartridge, comprising:
- a cartridge body;
- a polyester track etched membrane, disposed within the cartridge body, that is arranged to form a filter element having an interior including at least one end;
- at least one leak-free seal that closes the at least one end of the interior of the filter element;
- and
- a strip of material extending from the at least one leak-free seal;
- wherein the track etched membrane is encapsulated by the at least one leak-free seal;
- wherein the cartridge body includes a cage and at least one endcap, wherein the track etched membrane is disposed within the cage, and wherein the at least one leak-free seal is formed between the track etched membrane and the at least one endcap.
4 more elements
A filter cartridge, comprising:
- a cartridge body:
- a polyester track etched membrane, disposed within the cartridge body, that is arranged to form a filter element having an interior including at least one end;
- and
- at least one leak-free seal that closes the at least one end of the interior of the filter element;
- wherein the track etched membrane is encapsulated by the at least one leak-free seal;
- and
- wherein the track etched membrane has a bubble point when tested separately from the filter cartridge, and wherein the filter cartridge has a bubble point that is at least 90% of the bubble point of the track etched membrane.
4 more elements
A filter cartridge, comprising:
- a cartridge body;
- a polyester track etched membrane, disposed within the cartridge body that is arranged to form a filter element having an interior including at least one end;
- and
- at least one leak-free seal that closes the at least one end of the interior of the filter element;
- wherein the track etched membrane is encapsulated by the at least one leak-free seal;
- and
- wherein the track etched membrane includes a plurality of asymmetrical pores.
4 more elements
A filter cartridge, comprising:
- a cartridge body;
- a polyester track etched membrane, disposed within the cartridge body, that is arranged to form a filter element having an interior including at least one end;
- and
- at least one leak-free seal that closes the at least one end of the interior of the filter element;
- wherein the track etched membrane is encapsulated by the at least one leak-free seal;
- and
- wherein the track etched membrane includes a plurality of pores, and at least one shadow region that is free of pores.
4 more elements
A filter cartridge, comprising:
- a cartridge body;
- a polyester track etched membrane disposed within the cartridge body, that is arranged to form a filter element having an interior including at least one end;
- at least one leak-free seal that closes the at least one end of the interior of the filter element;
- and
- at least one support layer arranged to support the track etched membrane;
- wherein the track etched membrane is encapsulated by the at least one leak-free seal.
3 more elements
A filter cartridge, comprising:
- a cartridge body;
- a track etched membrane, disposed within the cartridge body, that is arranged to form a filter element having an interior including at least one end;
- and
- at least one leak-free seal that encapsulates the filter element and seals the at least one end of the interior of the filter element in a leak-free manner;
- wherein the track etched membrane includes a plurality of pores and at least one shadow region that is free of pores the at least one shadow region extending from the at least one leak-free seal.
2 more elements
Dependencies are inferred from the claim text.