Filter cartridge
First Claim
1. A filter cartridge for separating particles from fluid flowing inwardly through the cartridge, wherein the improvement consists essentially of:
- an inner tubular perforated core member;
a pre-formed needle punched mat of non-woven unbonded fibrous filtering material having a width substantially equal to the length of said core member and wrapped in a continuous spiral layer around only said core member and itself, to form a roll of said mat; and
a strand wound in a criss-cross open weave pattern around only the outer periphery of said roll and itself to form an open mesh network containing said roll.
2 Assignments
0 Petitions
Accused Products
Abstract
A filter cartridge or element for separating particles from fluid flowing inwardly through the cartridge, and a process for making the same, such cartridge having a central perforated inner tubular core member with a pre-formed mat of non-woven fibrous filter material having a width substantially equal to the length of the core member and wrapped around only the core member and itself in a continuous spiral layer to form a roll of the mat. The roll mat of filter material is contained or confined by an open mesh material such as that formed by a substantially single layer of a strand of roving wound in an open criss-cross or open diamond weave pattern around only the outer periphery of the material of the rolled mat and itself so as to maintain a permanent dimensional and structural stability or integrity during subsequent handling and use.
42 Citations
8 Claims
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1. A filter cartridge for separating particles from fluid flowing inwardly through the cartridge, wherein the improvement consists essentially of:
- an inner tubular perforated core member;
a pre-formed needle punched mat of non-woven unbonded fibrous filtering material having a width substantially equal to the length of said core member and wrapped in a continuous spiral layer around only said core member and itself, to form a roll of said mat; and
a strand wound in a criss-cross open weave pattern around only the outer periphery of said roll and itself to form an open mesh network containing said roll. - View Dependent Claims (3)
- an inner tubular perforated core member;
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2. A filter cartridge for separating particles from fluid flowing inwardly through the cartridge, wherein the improvement consists essentially of:
- an inner tubular perforated core member;
a pre-formed needle punched mat of non-woven fibrous filtering material having a width substantially equal to the length of said core member and wrapped in a continuous spiral layer around only said core member and itself, to form a roll of said mat; and
a strand wound in a criss-cross open weave pattern around only the outer periphery of said roll and itself to form an open mesh network containing said roll;
said cartridge, following formation thereof, being impregnated with resin to make the fibers of said roll more rigid without appreciably affecting the permeability of said cartridge. - View Dependent Claims (4)
- an inner tubular perforated core member;
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5. A process for making a filter cartridge for separating particles from fluid flowing inwardly through the cartridge wherein the improvement consists essentially of the steps of:
- mounting a tubular perforated core member on a mandrel;
rotating the core member and mandrel together;
wrapping a pre-formed needle punched mat of non-woven unbonded fibrous filtering material having a width substantially equal to the length of said core member in a continuous spiral layer around only said core member and itself, to form a roll of said mat; and
winding a strand in a criss-cross open weave pattern around only the outer periphery of said roll and itself, to form an open mesh network containing said roll. - View Dependent Claims (6, 7, 8)
- mounting a tubular perforated core member on a mandrel;
Specification