Claims
- 1. A rolling filter apparatus having
- a filter chamber with an inlet for receiving liquid medium, an outlet for discharging filtered liquid medium, said filter chamber having opposite side walls defining between them a path for the liquid medium from said inlet to said outlet;
- a filter medium spanning across said filter chamber between said side walls and having opposite edge portions disposed adjacent the respective side walls, said filter medium comprising a carrier web and filter material, said carrier web extending continuously across the full width of the filter chamber between said side walls and having imperforate longitudinal marginal edge portions and a medial foraminous zone, said filter material covering said foraminous zone with its side edges overlying said marginal edge portions of the carrier web, and means to guide said medium in a predetermined path through said filter chamber;
- said filter chamber having an entrance end and an exit end for said filter medium, and flange means projecting inwardly of said chamber from said sidewalls, said flange means being disposed on said opposite side walls in alignment with said predetermined path to underlie the edge portions of said filter medium and occupy the space between said filter medium and said side walls;
- means to advance said filter medium longitudinally through said filter chamber from its entrance end to its exit end, said medium spanning between said flange means with the side edges of said filter medium overlying the free edges of said flange means; and
- means to assemble the filter material of said filter medium onto said carrier web adjacent said entrance end of the chamber and feed the assembled filter medium into the filter chamber with the edges overlying the upstream surface of the flange means in intimate engagement therewith, whereby liquid medium flowing through said filter chamber must pass through said filter material in its travel from said inlet to said outlet;
- said means to guide said filter medium including a first series of parallel turning rolls disposed at a first level across the liquid inlet of said chamber and a second series of parallel turning rolls disposed at a second level across the liquid outlet of said chamber, said turning rolls being positioned and arranged so that said predetermined path extends in upright zig-zag runs alternately between said turning rolls of the first and second series;
- said inlet and outlet of said filter chamber having means to control the rates of flow through said inlet and outlet to maintain a reservoir of the liquid in the filter chamber having a liquid level above the upper ends of said upright zig-zag runs to completely immerse said upright runs.
- 2. Apparatus according to claim 1 wherein said guide means includes a foraminous shelf extending between said flange means to underlie and support said carrier web across the full width between the side walls of said filter chamber.
- 3. Apparatus according to claim 2 wherein said shelf is made of metal and has support girders underlying said shelf and mounted on said side walls.
- 4. Apparatus according to claim 1, wherein said guide means includes an imperforate shelf section extending from said entrance end to the first roll of said first series and a second imperforate shelf section extending from the last roll of said first series to said exit end.
- 5. Apparatus according to claim 1 wherein said carrier web comprises foraminous non-metallic screening fabric disposed in an endless loop, said guide means having means to cycle said loop through said filter chamber in said predetermined path.
- 6. Apparatus according to claim 5 wherein said foraminous material is a woven PTFE/glass fabric screening impregnated with PTFE resins.
- 7. Apparatus according to claim 1 wherein said filter material comprises a web of fibrous glass material with micro-bits of a synthetic polymer material combined with said fibers together with a binding agent to produce a mat which is permeable to liquid flow.
- 8. Apparatus according to claim 7 wherein said filter material includes a second web comprising an intimate blend or cobeat of cellulose fibers and said micro-bits and particulate carbonaceous adsorbing agents.
- 9. Apparatus according to claim 1 wherein said guide means for said filter medium includes an entrance slot for the filter medium at the entrance end of the filter chamber and an exit slot for the filter medium at the exit end of said filter chamber, said entrance and exit slots having sealing means cooperable with the filter medium to close said slots when said filter medium is stationary in said chamber.
- 10. Apparatus according to claim 9 wherein said means to advance said filter medium longitudinally comprises a drive motor, and including means to inactivate said sealing means for said slots when said drive motor is activated, and to activate said sealing means for said slots when said drive motor is inactivated.
- 11. Apparatus according to claim 1 wherein said means to control the rates of liquid flow includes valves.
- 12. Apparatus for a rolling filter comprising
- a filter chamber with an inlet for receiving liquid medium, an outlet for discharging filtered liquid medium, said filter chamber having opposite side walls defining between them a path for the liquid medium from said inlet to said outlet;
- filter material support means spanning across said filter chamber between said side walls and having opposite edge portions disposed adjacent the respective side walls to guide filter material in a predetermined path through said filter chamber, said filter material support means comprising a carrier web extending continuously across the full width of the filter chamber between said side walls and having imperforate longitudinal marginal edge portions and a medial foraminous zone;
- guide means supporting said carrier web comprising a first series of parallel turning rolls disposed at one level in the chamber across the liquid inlet of said chamber and a second series of parallel turning rolls disposed at a second level in the chamber across the liquid outlet of said chamber, said turning rolls being positioned and arranged for guiding said web in said predetermined path, said path having upright runs extending zig-zag alternately between the first and second levels of said turning rolls of the first and second series respectively, said filter chamber inlet and outlet having flow control means to maintain a reservoir for the liquid medium in the chamber with a liquid level above the upper ends of the upright runs;
- flange means projecting inwardly of said chamber from said sidewalls, said flange means being disposed on said opposite side walls in alignment with said predetermined path to underlie the edge portions of said filter material support means and occupy the space between said support means and said side walls;
- said apparatus having an entrance end and an exit end and means to advance said filter material support means longitudinally through said filter chamber from its entrance end to its exit end, said filter material support means spanning between said flange means with the side edges of said filter material support means overlying the free edges of said flange means; and
- means to assemble filter material onto said carrier web adjacent said entrance end of the chamber so that the filter material on said carrier web is positioned to cover said foraminous zone with its side edges at least partially overlying said marginal edge portions, and means to feed the carrier web into the filter chamber with the edges of the carrier web overlying the upstream surface of the flange means in intimate engagement therewith.
- 13. Apparatus according to claim 12 wherein said means to assemble filter material comprises a roll stand having means to support a plurality of supply rolls of filter material positioned so that filter material from each supply roll may be positioned on said carrier web.
- 14. Apparatus according to claim 13 including a first roll having a first mat of non-woven glass fibers with micro-bits of an expanded polymer and a binder, and a second roll having a second mat of non-woven cellulosic fibers with micro-bits of an expanded polymer and at least one particulate carbonaceous absorbent, said first and second rolls being carried by said means to support a plurality of supply rolls positioned so that filter material from both of said first and second rolls may be positioned in overlying relationship on said carrier web.
- 15. Apparatus according to claim 14 wherein said roll stand is positioned and arranged to assemble said first mat to said carrier web on top of said second mat, whereby said second mat is sandwiched between said first mat and said web.
- 16. A rolling filter apparatus having
- a filter chamber with an inlet for receiving liquid medium, an outlet for discharging filtered liquid medium, said filter chamber having side walls defining between them a path for the liquid medium from said inlet to said outlet;
- a filter medium spanning across said filter chamber between said side walls and having opposite edge portions disposed adjacent the respective side walls, said filter medium comprising a carrier web and filter material, said carrier web extending continuously across the full width of the filter chamber between said side walls and having imperforate longitudinal marginal edge portions and a medial foraminous zone, said filter material covering said foraminous zone with its side edges overlying said marginal edge portions of the carrier web;
- means to guide said medium in a predetermined path through said filter chamber;
- said filter chamber having an entrance end and an exit end for said filter medium, and flange means projecting inwardly of said chamber from said sidewalls, said flange means being disposed on said opposite side walls in alignment with said predetermined path to underlie the edge portions of said filter medium and occupy the space between said filter medium and said side walls;
- means cooperating with said guide means to advance said filter medium longitudinally through said filter chamber from its entrance end to its exit end, said medium spanning between said flange means with the side edges of said filter medium overlying the free edges of said flange means;
- means to assemble the filter material of said filter medium onto said carrier web adjacent said entrance end of the chamber and feed the assembled filter medium into the filter chamber with the edges overlying the upstream surface of the flange means in intimate engagement therewith, whereby liquid medium flowing through said filter chamber must pass through said filter material in its travel from said inlet to said outlet; and
- said means to guide said filter medium including a first series of parallel turning rolls disposed across the liquid inlet of said chamber and a second series of parallel turning rolls disposed across the liquid outlet of said chamber, said turning rolls being positioned and arranged so that said predetermined path extends in zig-zag runs alternately between said turning rolls of the first and second series, means to disassemble said filter material from said carrier web beyond said exit end, whereby said filter material and carrier web follow said path together through said filter chamber.
- 17. Apparatus according to claim 16 wherein said means to assemble the filter material onto the carrier web comprises a supply roll of a first filter material, and a supply roll of a second filter material, said rolls being positioned and arranged to overlay the second filter material on top of the first filter material on the carrier web.
RELATED APPLICATION
The present application is a continuation-in-part of abandoned U.S. patent application Ser. No. 482,618 which was filed Apr. 6, 1983 as a continuation-in-part of my earlier U.S. patent application Ser. No. 306,694 filed Sept. 29, 1981 entitled "Filter Apparatus" now U.S. Pat. No. 4,394,146.
US Referenced Citations (31)
Foreign Referenced Citations (2)
Number |
Date |
Country |
17712 |
May 1972 |
JPX |
20058 |
Jun 1972 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Mitsubishi Air Cleaner (undated, but translation dated Apr. 10, 1981). |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
482618 |
Apr 1983 |
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Parent |
306694 |
Sep 1981 |
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