Patent US2898627A successfully refreshed from Google Patents.
Patent EP0177167A1 successfully refreshed from Google Patents.
EP0177167A1
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Porous tubes
Assignee: Shirley Institute
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Filing: 1985-08-28
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Granted: —
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Expires: 2005-08-28
Abstract
Abstract Porous tubes are made from thermally bonded non- woven. Such tubes can be made seamless and suitable for lining with a semi-permeable membrane for reverse osmosis filtration. Fleece or card webs (32) can be wrapped around a mandrel (35) and compacted as by rolling and/or needling and thermobonded on the mandrel which may be tapered to ease removal.
Inventors
- 👤 Kenneth Lewthwaite Floyd
- 👤 Josef Katona
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:48
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; A; A61; A61F; A61F13/00; A61F13/15; A61F13/20; A61F13/26; A61F2/00; A61F2/02; A61F2/04; A61F2/06; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/163; B01D69/00; B01D69/10; B01D69/107; B01D69/1071; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/583; B29C53/587; D04H1/44; D04H1/46; D04H1/48; D04H1/485; D04H1/542; D04H1/544; D04H1/55; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/0478; B01D2239/06; B01D2239/065; B01D2239/0659; B01D2239/0668; B01D2239/069; B01D2239/0695; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1291
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
29 words
A porous tube comprising a wall material of thermally bondea non-woven fibres, the thermal bonding agent being part ot the web or fleece from which the tube is maae.
Claim 2
Dependent Claim
29 words
A porous tube comprising a wall material of thermally bondea non-woven fibres, the thermal bonding agent being part ot the web or fleece from which the tube is maae.
Claim 3
Dependent Claim
8 words
A tube accoraing to claim 1, being seamless.
Claim 4
Dependent Claim
18 words
A tube accoraing to claim 1 or claim 2, having an internal diameter between 0.5 ana 5 cm.
Claim 5
Dependent Claim
19 words
A tube accoraing to any one of claims 1 to 3, having a length of up to 4 metres.
Claim 6
Dependent Claim
16 words
A tube according to any one of claims 1 to 4, linea with a semi-permeable membrane.
Claim 7
Independent Claim
59 words
A method of making a porous tube comprising forming a tubular fibre mass, including a melt component and a structure component, around a mandrel, and compacting the fibre mass and heating and cooling it to cause said melt component to melt and reset to form bonds between structure component fibres, and removing the resultant thermobonded tube from the mandrel.
Claim 8
Independent Claim
59 words
A method of making a porous tube comprising forming a tubular fibre mass, including a melt component and a structure component, around a mandrel, and compacting the fibre mass and heating and cooling it to cause said melt component to melt and reset to form bonds between structure component fibres, and removing the resultant thermobonded tube from the mandrel.
Claim 9
Dependent Claim
35 words
A methoa of making a porous tube according to claim 6 in which the melt component is one or more of polyethylene, polypropylene or other polyolefine or polyamiae ana the structure component is polyester fibre.
Claim 10
Dependent Claim
18 words
A methoa accoraing to claim 6 or claim 7, in which the tube is formed without a seam.
Claim 11
Dependent Claim
31 words
A methoa according to claim 8, in which a fibrous web or fleece is wrapped, at approximately tube length, several times about the mandrel, to form a single length of tube.
Claim 12
Dependent Claim
26 words
A method according to claim 9, in which the fibrous web or fleece is wrapped with a helix angle to form a tube with tapered ends.
Claim 13
Dependent Claim
27 words
ll. A methoa according to any one of claims 7 to 10, in which the mandrel is slightly tapered to facilitate removal of the finished tube therefrom.
Claim 14
Independent Claim
32 words
A method according to any one of claims 9 to 11, in which the wrapped web or fleece is compacted by an arrangement of rotary rollers extending the length of the mandrel.
Claim 15
Dependent Claim
16 words
A methoa accoraing to claim 12, in which the roller arrangement is locatea in an oven.
Claim 16
Dependent Claim
12 words
A method according to claim 13 in which the rollers are heated.
Claim 17
Dependent Claim
50 words
A methoa according to any one of claims 6 to 9, in which the tube is formea continuously by wrapping a fibre web or fleece continously on one ena of a mandrel ana moving the wrappea fleece along the mandrel whilst compacting it and heating it to form the bonding.
Claim 18
Dependent Claim
25 words
A methoa accoraing to claim 15, in which the manarel is taperea ana the tube is continuously moved towaras the narrow ena of the mandrel.
Claim 19
Independent Claim
24 words
A method according to any one of claims 7 to 16, in which the tubular fibre mass is needle punched while on the mandrel.
Claim 20
Dependent Claim
47 words
A method according to claim 17, in which the mandrel has holes into which needles can pass and there is a guide member adjacent the mandrel with aligned apertures, ana needle oscillating means drive the needles through the fibre mass between the guide member and the mandrel.
Claim 21
Dependent Claim
20 words
A methoa accoraing to claim 18, saia guide means being cylinarically aisposea about the manarel and the needles oscillating raaially.
Claim 22
Dependent Claim
23 words
A methoa accoraing to any one of claims 7 to 19, in which the web or fleece is supplies from a carding process.
Claim 23
Independent Claim
34 words
A method according to any one of claims 7 to 20, in which the web or fleece has portions of different materials whereby different parts of the tube will be of such different materials.
Claim 24
Dependent Claim
45 words
A method according to claim 21, in which a first-wrappea part of the web is of a first material and a second-wrapped part of a second material whereby the inside of the tube is of the first material and the outside of the secono material.
Claim 25
Dependent Claim
20 words
A methoa accoraing to claim 22 wherein said first and second materials are polyolefine or polyamide and a polyester respectively.
Claim 26
Dependent Claim
43 words
Apparatus for making a porous tube comprising a mandrel on which a web or fleece of fibre can be wrapped to form a tubular fibre mass, compacting means for compacting said mass while on said mandrel ana heating means for thermobonaing saia mass.
Claim 27
Dependent Claim
43 words
Apparatus for making a porous tube comprising a mandrel on which a web or fleece of fibre can be wrapped to form a tubular fibre mass, compacting means for compacting said mass while on said mandrel ana heating means for thermobonaing saia mass.
Claim 28
Dependent Claim
18 words
Apparatus according to claim 24, said mandrel being tapered for ease of removal of said thermobonded fibre mass.
Claim 29
Dependent Claim
34 words
Apparatus accoraing to claim 24 or claim 25, said compacting means comprising an arrangement of roller parallel to ana surrounding said mandrel in which the mandrel with its wrappea fibre mass can be rolled.
Claim 30
Dependent Claim
17 words
Apparatus according to any one of claims 24 to 26, said compacting means comprising a needling arrangement.
Claim 31
Dependent Claim
19 words
Apparatus according to any one of claims 24 to 27, said heating means comprising an oven housing said mandrel.
Claim 32
Dependent Claim
24 words
A tube made by any of the above means coated with a semi-permeable or porous membrane for use in reverse osmosis, ultrafiltration or microfiltration.
Claim 33
Dependent Claim
24 words
A tube made by any of the above means coated with a semi-permeable or porous membrane for use in reverse osmosis, ultrafiltration or microfiltration.
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