ROLLER STRIP FILTER FOR PURIFYING AIR OR GASES

• US 3,695,008 A
• Filed: 01/15/1970
• Issued: 10/03/1972
• Est. Priority Date: 01/21/1969
• Status: Expired due to Term

• Current Assignee: Gerhard Neumann
• Original Assignee: Gerhard Neumann
• Inventors: Neumann, Gerhard
• Primary Examiner(s): Nozick, Bernard
• Application Number:
  US05/002,995
• Time in Patent Office: 992 Days
• Field of Search: 55/351-354,484,501
• US Class Current: 55/354
• CPC Class Codes: B01D 46/18 Particle separators, e.g. dust precipitators, using filtering belts

Abstract

A roller-strip filter for air or gas purification, which can be easily disassembled, consists of two units separable from each other. The first unit comprises a mounting framework, seals for the filter strip and support grids for backing the filter strip , guide rollers for the filter strip; the second unit comprises feed and wind-up rollers for moving the filter strip and a drive unit for rotating the wind-up roller, whereby the more delicate components can be mounted in the filter framework after fitting the framework to a wall portion or the like.

Claims

1. A roller-strip filter comprising:

a mounting framework fitting into a wall opening, said framework including a rectangular structure with a pair of vertical member and a pair of transverse horizontal members surrounding an air passage, said vertical members defining a pair of coplanar sealing surfaces on opposite sides of said air passage;

strip-guiding means on said structure including a pair of grids spanning said air passage with sufficient separation to form a path therebetween for a vertically movable filter strip advancing across said opening along said sealing surfaces;

a pair of uprights provided with fastening means removably attaching same to said vertical members outside said sealing surfaces;

a feed roller supplying said filter strip and having a first horizontal shaft journaled on said uprights adjacent one of said horizontal members;

a wind-up roller taking up said filter strip and having a second horizontal shaft journaled on said uprights adjacent the other of said horizontal members;

drive means for said second shaft on one of said uprights; and

a pair of pressure elements carried on said framework for holding the lateral edges of said filter strip tight against said sealing surfaces.

2. A filter as defined in claim 1 wherein said pressure bars are parts of a pair of angled profiles having other parts adjustably mounted on said vertical members, one of said grids comprising a set of vertical rods mounted on said horizontal members, the other of said grids comprising a set of rods carried on cross bars interconnecting said profiles.

3. A filter as defined in claim 2 wherein said vertical members are profiled bars of generally S-shaped profile with intermediate legs secured to said other parts and with webs spacedly overlain by said pressure bars.

4. A filter as defined in claim 3 wherein said webs are provided with spring-loaded clamping bolts engaging said pressure bars for selective adjustment of the spacing between said webs and said pressure bars.

5. A filter as defined in claim 3 wherein said profiled bars form channels open toward said uprights and provided with bridging formations engaging said uprights at the top and the bottom thereof.

6. A filter as defined in claim 5 wherein said uprights are bail-shaped members with bent-over top and bottom extremities terminating in transverse lugs secured to said bridging formations.

7. A filter as defined in claim 1 wherein said uprights are bail-shaped members with bent-over top and bottom extremities fastened to said vertical members, further comPrising cross braces interconnecting said uprights at corners formed by said bent-over extremities.

8. A filter as defined in claim 7 wherein said uprights are provided near said top extremities with lugs projecting away from said framework and forming rests for the ends of said first shaft.

9. A filter as defined in claim 8 wherein said lugs have upper edges provided with vertical notches constituting said rests.

10. A filter as defined in claim 8 wherein said lugs have vertical edges provided with downwardly slanting recesses constituting alternate rests adapted to receive the ends of said first shaft during insertion of a filter strip from said pay-off roller between said grids.

11. A filter as defined in claim 10 wherein said lugs are provided with generally L-shaped latches swingable into positions obstructing said notches and said recesses.

12. A filter as defined in claim 8, further comprising a hood for said pay-off roller pivotally mounted on said lugs.

13. A filter as defined in claim 12, further comprising tension springs anchored to said lugs and to said hood for urging same into a closed position.

14. A filter as defined in claim 7 wherein the other of said uprights is provided near its bottom extremity with a fixed, upwardly open bearing half for an end of said second shaft and with a complementary, vertically movable bearing half.

15. A filter as defined in claim 14, further comprising fastening means engageable with said complementary bearing half for fixing same in a shaft-retaining position.

16. A filter as defined in claim 15 wherein said complementary bearing half forms an end stop for said second shaft.

17. A filter as defined in claim 16 wherein said complementary bearing half has two depending legs spaced apart in the axial direction of said second shaft, said legs bracketing said upwardly open bearing half in said shaft-retaining position, one of said legs having a bottom recess giving clearance to said second shaft, the other of said legs being solid and constituting said end stop.

18. A filter as defined in claim 14 wherein said drive means comprises a motor-driven wheel coaxial with said second shaft, the latter being provided with a disk adjacent said wheel, said wheel and said disk having confronting surfaces provided with mating formations for positively coupling said second shaft to said wheel upon the remote end thereof engaging said end stop.

19. A filter as defined in claim 18 wherein said mating formations include a diametrical rib on one of said confronting surfaces and a complementary box-shaped diametrical projection on the other of said confronting surfaces.

20. A filter as defined in claim 18 wherein said wheel is provided with sprocket teeth engageable by a drive chain.

21. A filter as defined in claim 18, wherein the upright carrying said wheel is juxtaposed with a similar upright on an adjoining second framework, further comprising coupling means on said similar upright engageable with said wheel for entraining another wind-up roller on said second framework.

22. A filter as defined in claim 21 wherein said coupling means comprises a second disk having a stub shaft aligned with a stub shaft of said wheel, said stub shafts being releasably interconnected for joint rotation.

23. A filter as defined in claim 22 wherein said stub shafts are provided with polygonal ends confronting each other and with a complementary connecting sleeve engaging said polygonal ends.