GB2306897A - Filter with flowable, settable sealant - Google Patents
Filter with flowable, settable sealant Download PDFInfo
- Publication number
- GB2306897A GB2306897A GB9621980A GB9621980A GB2306897A GB 2306897 A GB2306897 A GB 2306897A GB 9621980 A GB9621980 A GB 9621980A GB 9621980 A GB9621980 A GB 9621980A GB 2306897 A GB2306897 A GB 2306897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- edge
- settable material
- housing
- filter member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000009969 flowable effect Effects 0.000 title 1
- 239000000565 sealant Substances 0.000 title 1
- 239000000463 material Substances 0.000 claims description 18
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000004945 silicone rubber Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 description 12
- 239000011148 porous material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/081—Manufacturing thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/012—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/18—Filters characterised by the openings or pores
- B01D2201/188—Multiple filtering elements having filtering areas of different size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/52—Filter identification means
Description
FILTERS
This invention relates to filters.
Depth filters, especially of the electrostatic type, rely on the depth of the filter material for their efficiency. Some filters have discs of different filter materials, such as with varying density, stacked one on top of another and sealed at their edge by clamping them between two halves of the housing. The problem with this is that clamping compresses the discs, thereby reducing their thickness in the region of their edge and reducing the efficiency of the filter in this region. Because the compressed area extends around the periphery of the discs, it can be a significant proportion of the filter are9 To compensate for this, and to produce the desired throughput, it is necessary to increase the size of the filter, making it heavier and more bulky.
It is an object of the present invention to provide an improved filter.
According to the present invention there is provided a filter comprising a housing and at least one porous, compressible filter member, the edge of the filter member being sealed around its outer edge in a settable material flowed into the filter member, and the settable material sealing and supporting the filter member in the housing without compression.
The filter may include a plurality of filter members arranged as a stack in series with one another, the edge of each filter member being sealed with one another around its outer edge in the settable material. The plurality of filter members may differ from one another in filtering properties. At least one filter member is preferably a depth filter. At least one filter member is preferably an electrostatic filter. The housing preferably has an annular recess, the settable material being located in and forming a seal with the recess. The settable material may be silicone rubber.
A depth filter in accordance with the present invention, will now be described, by way of example, with reference to the accompanying drawing, in which:
Figure 1 is a sectional side elevation view through the filter; and
Figure 2 is a transverse sectional view along the line II - II of Figure 1.
The depth filter comprises a housing 1 formed in two halves 2 and 3 of a rigid plastics material. The housing 1 is of a circular section and tapers at opposite ends to an inlet port 4 and a outlet port 5.
Where the two halves 2 and 3 abut one another, they are each provided with a respective annular recess 6 and 7 around their inner surface to provide a single annular recess.
The two halves 2 and 3 are joined together such as by welding or adhesive, or by means of cooperating screw threads.
Located within the annular recesses 6 and 7, between the two halves 2 and 3 of the housing 1, is a filter element 10. The element 10 includes a stack of four filter members or membranes 11 to 14 of a compressible, porous material. The material differs according to the substance being filtered and may be, for example, a woven fabric or paper material. The filter membranes 11 to 14 may differ one from the other in filtering properties, such as by pore size, so that the upstream membrane removes coarse particles, finer particles being removed by successive downstream membranes. The number of membranes also varies according to the application. The membranes 11 to 14 contact each other over their facing surfaces to provide support for one another.
The membranes are moulded around their edge into a peripheral, cylindrical collar 15 of silicone rubber. The exterior dimensions of the collar ensure that it is a close, sealing fit within the recesses 6 and 7 around the housing 1. The material of the collar 15 flows into the material of the membranes 11 to 14 during the moulding process so as to produce an effective seal and mechanical support around the edge of the membranes when set. Fluid flowing through the filter, between the inlet port 4 and outlet port 5 is confined to flow through each filter membrane 11 to 14 without the risk of any leakage around the edge. The entire surface of the membranes 11 to 14 is equally efficient right up to the inner edge of the collar 15, in contrast with previous depth filter where the membranes are retained at their edge by clamping and compressing.
The edge seal produced by the silicone rubber, or other settable material, could be used with a single filter member such as of foam. The edge seal reduces the risk of bacteria migrating between the housing and the edge of the filter member, which can otherwise be a problem, especially where the edge is cut and has irregular pore or cell sizes.
The filter could be used to filter gases or liquids.
Claims (9)
1. A filter comprising a housing and at least one porous, compressible filter member,
wherein the edge of the filter member is sealed around its outer edge in a settable
material flowed into the filter member, and wherein the settable material seals and
supports the filter member in the housing without compression.
2. A filter according to Claim 1, including a plurality of filter members arranged as a
stack in series with one another, and wherein the edge of each filter member is sealed
with one another around its outer edge in the settable material.
3. A filter according to Claim 2, wherein the plurality of filter members differ from one
another in filtering properties.
4. A filter according to any one of the preceding claims, wherein at least one filter
member is a depth filter.
5. A filter according to any one of the preceding claims, wherein at least one filter
member is an electrostatic filter.
6. A filter according to any one of the preceding claims, wherein the housing has an
annular recess, and wherein the settable material is located in and forms a seal with
said recess.
7. A filter according to anyone of the preceding claims, wherein the settable material is
silicone rubber.
8. A filter substantially as hereinbefore described with reference to the accompanying
drawings.
9. Any novel feature or combination of features as hereinbefore described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9621980A GB2306897B (en) | 1995-11-09 | 1996-10-22 | Filters |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9522999.3A GB9522999D0 (en) | 1995-11-09 | 1995-11-09 | Filters |
| GB9621980A GB2306897B (en) | 1995-11-09 | 1996-10-22 | Filters |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9621980D0 GB9621980D0 (en) | 1996-12-18 |
| GB2306897A true GB2306897A (en) | 1997-05-14 |
| GB2306897B GB2306897B (en) | 1999-11-03 |
Family
ID=26308082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9621980A Expired - Fee Related GB2306897B (en) | 1995-11-09 | 1996-10-22 | Filters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2306897B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986420A (en) * | 2017-03-01 | 2017-07-28 | 同济大学 | A kind of metal film terminal cross-flow filtration dual-purpose cup tank arrangement |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954625A (en) * | 1974-09-27 | 1976-05-04 | Plastisonics Company, Inc. | Filter and method of forming same |
| US4414172A (en) * | 1982-05-21 | 1983-11-08 | Filtertek, Inc. | Process and apparatus for sealing a plurality of filter elements |
| GB2223423A (en) * | 1988-09-22 | 1990-04-11 | Canada Minister Defence | Compression seal canister |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4113627A (en) * | 1976-01-28 | 1978-09-12 | Filtertek, Inc. | Process for making hermetically sealed filter units and filters made thereby |
| US4283289A (en) * | 1979-08-22 | 1981-08-11 | Baxter Travenol Laboratories, Inc. | Blood filter for leukocytes |
-
1996
- 1996-10-22 GB GB9621980A patent/GB2306897B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954625A (en) * | 1974-09-27 | 1976-05-04 | Plastisonics Company, Inc. | Filter and method of forming same |
| US4414172A (en) * | 1982-05-21 | 1983-11-08 | Filtertek, Inc. | Process and apparatus for sealing a plurality of filter elements |
| GB2223423A (en) * | 1988-09-22 | 1990-04-11 | Canada Minister Defence | Compression seal canister |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986420A (en) * | 2017-03-01 | 2017-07-28 | 同济大学 | A kind of metal film terminal cross-flow filtration dual-purpose cup tank arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9621980D0 (en) | 1996-12-18 |
| GB2306897B (en) | 1999-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20021022 |