Filter apparatus
First Claim
1. A roll type filter apparatus having a filter chamber with an inlet for receiving gaseous medium, an outlet for discharging filtered gaseous medium, said filter chamber having opposite side walls defining between them a path for the gaseous 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 support grid and a filter mat substantially co-extensive with said support grid, and means to guide said medium in a predetermined path through said filter chamber with one surface facing upstream toward said inlet and the opposite surface facing downstream toward said outlet, said support grid being on the downstream side of said filter mat;
- 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 on the downstream or outlet side of said filter medium and occupy the space between said filter medium and said side walls, and having a series of apertures disposed in longitudinally-spaced relation along the length of said flange means;
means to advance said filter medium longitudinally through said filter chamber 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 mat of said filter medium onto said support grid and feed the assembled filter medium into the filter chamber with the opposite edge portions overlying the upstream surface of the respective flange means including the series of apertures, said apertures operable to provide fluid communication between the filter chamber outlet and the upstream surface of said flange means in the area where said medium is in overlying relation therewith to effect intimate engagement therebetween, whereby gaseous medium flowing through said filter chamber must pass through said filter medium in its travel from said inlet to said outlet.
1 Assignment
0 Petitions
Accused Products
Abstract
Filtration apparatus in which the filter medium is in the form of a mat assembled with a support grid which is caused to traverse through a filter chamber in a zig zag path. The mat and support grid extend between the side walls of the filter chamber and are advanced by turning rolls disposed at upper and lower levels. The support grid for the filter mat extends between sealing flanges projecting from the side walls of the filter chamber and auxiliary support for the support grid may be provided by employing a foraminous shelf extending between the flanges. The filter medium is disposed so that its edges overlie the sealing flanges, thereby preventing flow of gaseous medium around the edges of the filter mat. Sealing engagement between the sealing flanges and the filter mat is assured by the inclusion of a series of apertures spaced along the length of the flanges. The undersurface of the filter mat faces the downstream side of the filter housing so that the reduced pressure downstream of the filter mat is applied to the undersurface of the filter mat and effects firm engagement with the flanges.
35 Citations
10 Claims
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1. A roll type filter apparatus having a filter chamber with an inlet for receiving gaseous medium, an outlet for discharging filtered gaseous medium, said filter chamber having opposite side walls defining between them a path for the gaseous 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 support grid and a filter mat substantially co-extensive with said support grid, and means to guide said medium in a predetermined path through said filter chamber with one surface facing upstream toward said inlet and the opposite surface facing downstream toward said outlet, said support grid being on the downstream side of said filter mat;
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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 on the downstream or outlet side of said filter medium and occupy the space between said filter medium and said side walls, and having a series of apertures disposed in longitudinally-spaced relation along the length of said flange means; means to advance said filter medium longitudinally through said filter chamber 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 mat of said filter medium onto said support grid and feed the assembled filter medium into the filter chamber with the opposite edge portions overlying the upstream surface of the respective flange means including the series of apertures, said apertures operable to provide fluid communication between the filter chamber outlet and the upstream surface of said flange means in the area where said medium is in overlying relation therewith to effect intimate engagement therebetween, whereby gaseous medium flowing through said filter chamber must pass through said filter medium in its travel from said inlet to said outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification