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EP0083789A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Corrugated filter element with external spiral tape support

Assignee: Pall Corp
•
Filing: 1982-12-24
•
Granted: —
•
Expires: 2002-12-24
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Abstract

Abstract A corrugated cylindrical filter element is provided having an external spiral tape support comprising a corrugated filter sheet material in the form of a cylinder having an end cap at each end of the cylinder sealingly bonded to the filter sheet material at that end, the corrugations of the filter sheet material having a tendency to become distorted and displaced with respect to each other under the conditions to which the material is subjected in use, and a relatively narrow strip of continuous high-modulus fiber-reinforced synthetic plastic tape spirally wound around the cylinder, spanning the corrugations and extending between each end and bonded to the end cap and to the tips of the corrugations in a manner to prevent distortion and displacement thereof.

Inventors

  • 👤 David B. Pall

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 05:11
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/04; B01D2201/0407

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 119 words
A corrugated cylindrical filter element comprising a corrugated filter sheet material in the form of a cylinder and having an end cap at each end of the cylinder sealingly bonded to the filter sheet material at that end, the corrugations of the filter sheet material having a tendency to become distorted and displaced with respect to each other under the conditions to which the material is subjected in use; and a relatively narrow strip of continuous high modulus fiber-reinforced tape of synthetic plastic material spirally wound around the cylinder, spanning the corrugations and extending between each end and bonded to the end cap and to the tips of the corrugations in a manner to prevent distortion and displacement thereof.
Claim 2
Dependent Claim 119 words
A corrugated cylindrical filter element comprising a corrugated filter sheet material in the form of a cylinder and having an end cap at each end of the cylinder sealingly bonded to the filter sheet material at that end, the corrugations of the filter sheet material having a tendency to become distorted and displaced with respect to each other under the conditions to which the material is subjected in use; and a relatively narrow strip of continuous high modulus fiber-reinforced tape of synthetic plastic material spirally wound around the cylinder, spanning the corrugations and extending between each end and bonded to the end cap and to the tips of the corrugations in a manner to prevent distortion and displacement thereof.
Claim 3
Dependent Claim 17 words
A filter element in accordance with claim 1, in which the tape is made of thermoplastic material.
Claim 4
Dependent Claim 17 words
A filter element in accordance with claim 1, in which the tape is made of polypropylene. :
Claim 5
Dependent Claim 32 words
A filter element in accordance with claim 1, in which the tape is from about 0. 1 to about 0. 4 mm thick and from about 3 to about 8 mm wide.
Claim 6
Dependent Claim 18 words
A filter element in accordance with claim 1, in which the tape is a pressure sensitive adhesive tape.
Claim 7
Dependent Claim 31 words
A filter element in accordance with claim 1, in which the tape spirals terminate in a circumferential wrap at each end of the filter cylinder within the end cap-to-cylinder bonding area.
Claim 8
Dependent Claim 25 words
A filter element in accordance with claim 6, in which the end cap has a peripheral flange and the circumferential wrap is within the flange.

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