Patent US2827862A successfully refreshed from Google Patents.
Patent EP0044042A2 successfully refreshed from Google Patents.
EP0044042A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Filter cartridge with castellated support and process of making the same
Assignee: Pall Corp
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Filing: 1981-07-09
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Granted: —
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Expires: 2001-07-09
Abstract
Abstract A filter cartridge is provided comprising, in combination: (1) a filter sheet material formed in a tube open at at least one end; (2) a support such as an internal core or external sheath disposed in supporting relation to and substantially coextensive with the tube and supporting the filter sheet material of the tube; (3) the support having one end at the open end of the tube formed in a castellated configuration in which at least some of the castellations define grooves therebetween, preferably having reentrant sides; and (4) at least one end cap attached to and extending across the open end of the tube of filter sheet material, and having embedded therein at least the castellated end of the support, with end cap material extending into and substantially filling the grooves, thereby fixedly attaching the end cap to the support in a leak-tight seal.
Inventors
- 👤 David B. Pall
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 03:24
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/19; B01D29/21; B01D2201/00; B01D2201/04; B01D2201/0415
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
A filter cartridge comprising, in combination: (1) a filter sheet material formed in a tube open at at least one end; (2) a support such as an internal core or external sheath disposed in supporting relation to and substantially coextensive with the tube and supporting the filter sheet material of the tube; (3) the support having one end at the open end of the tube formed in a castellated configuration in which at least some of the castellations define grooves therebetween; and (4) at least one end cap attached to and extending across the open end of the tube of filter sheet material, and having embedded therein at least the castellated end of the support, with end cap material extending into and substantially filling the grooves, thereby fixedly attaching the end cap to the support in a leak-tight seal.
Claim 2
Dependent Claim
139 words
A filter cartridge comprising, in combination: (1) a filter sheet material formed in a tube open at at least one end; (2) a support such as an internal core or external sheath disposed in supporting relation to and substantially coextensive with the tube and supporting the filter sheet material of the tube; (3) the support having one end at the open end of the tube formed in a castellated configuration in which at least some of the castellations define grooves therebetween; and (4) at least one end cap attached to and extending across the open end of the tube of filter sheet material, and having embedded therein at least the castellated end of the support, with end cap material extending into and substantially filling the grooves, thereby fixedly attaching the end cap to the support in a leak-tight seal.
Claim 3
Dependent Claim
27 words
A filter cartridge in accordance with claim 1 in which the end portion of the tube of filter sheet material is also embedded in the end cap.
Claim 4
Dependent Claim
15 words
A filter cartridge in accordance with claim 1 in which the grooves have reentrant sides.
Claim 5
Dependent Claim
34 words
A filter cartridge in accordance with claim 1 including the step of grinding the edges of the filter sheet and support so that they are substantially flush prior to applying the end cap thereto.
Claim 6
Dependent Claim
28 words
A filter cartridge in accordance with claim 1 wherein the support is an internal support core whose edges are substantially flush with the edges of the filter material.
Claim 7
Dependent Claim
17 words
A filter cartridge in accordance with claim 1 wherein the filter sheet material is a thermoplastic resin.
Claim 8
Dependent Claim
35 words
A filter cartridge in accordance with claim 1 wherein the filter sheet material includes an internal support core and the filter material, internal support core and end cap are made of the same thermoplastic material.
Claim 9
Dependent Claim
106 words
A process for applying an end cap to filter sheet material formed in a tube open at at least one end and supported by a support that is substantially coextensive with the tube, and which comprises: (1) forming at least one end of the support in a castellated configuration in which at least some of the castellations define grooves the rebetween; (2) embedding the castellations of the support into one face of the end cap with end cap material extending into and substantially filling the grooves; and (3) hardening the end cap material, thereby fixedly attaching the end cap to the support in a leak-tight seal.
Claim 10
Dependent Claim
106 words
A process for applying an end cap to filter sheet material formed in a tube open at at least one end and supported by a support that is substantially coextensive with the tube, and which comprises: (1) forming at least one end of the support in a castellated configuration in which at least some of the castellations define grooves the rebetween; (2) embedding the castellations of the support into one face of the end cap with end cap material extending into and substantially filling the grooves; and (3) hardening the end cap material, thereby fixedly attaching the end cap to the support in a leak-tight seal.
Claim 11
Dependent Claim
120 words
9 . A process in accordance with claim 8 in which the end cap is preformed, and which comprises heating an inside face of the end cap to a temperature sufficient to fuse from about 10 to about 90% of the thickness of the end cap into a liquid of a viscosity capable of penetrating into the grooves of castellations of the support, while cooling the outside face of the end cap to a temperature below its softening point, to maintain the remainder of the end cap in a. solid state, embedding all of the castellated edges of the support into the end cap material so that the material extends into the grooves; and then hardening the end cap material.
Claim 12
Dependent Claim
14 words
A process in accordance with claim 9 in which the grooves have reentrant sides.
Claim 13
Dependent Claim
33 words
A process in accordance with claim 8 including the step of grinding the edges of the filter sheet and support so that they are. substantially flush prior to applying the end cap thereto.
Claim 14
Dependent Claim
27 words
A process in accordance with claim 8 wherein the support is an internal support core whose edges are substantially flush with the edges of the filter material.
Claim 15
Dependent Claim
34 words
A process in accordance with claim 8 wherein the filter sheet material includes an internal support core and the filter material, internal support core and end cap are made of the same thermoplastic material.
Claim 16
Dependent Claim
82 words
A process in accordance with any one of claims 8 - 13 in which the end cap is formed in situ, and which comprises heating end cap material to a temperature sufficient to fuse the material into a liquid of a viscosity capable of penetrating into the grooves of castellations of the support, embedding all of the castellated edges of the support into the end cap material so that the material extends into the grooves; and then hardening the end cap material.
References Cited (Backward Citations)
No citation records indexed.
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