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US 7,344,580 B2Granted
Filter unit
AssigneeAbsolent AB
InventorThomas Lindblom
Life of this patent
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Abstract
Converting machines give rise to polluted air which must be removed with the aid of fans and filters. The invention aims at removal of the polluted air in such a way that the servicing interval is greatly extended by the use of a filter unit having a number of part-filters arranged one after the other and formed of pleated fiber mats, the various mats having different filtering properties.
Claims18
A filter unit for filtering polluted air, said filter unit comprising
- a housing having an upper end and a lower end;
- said housing having an inlet located at said lower end and an outlet located at said upper end;
- a plurality of part-filter units located in said housing, wherein said part-filter units are arranged one above the other;
- wherein each of said part-filter units comprises a plurality of filter mats located parallel with each other and with the direction of flow of the polluted air;
- wherein the direction of flow of a volume of air in the housing is from said lower end to said upper end of said housing;
- wherein all of the volume of air entering the inlet is filtered by a first part-filter unit located at the lowermost part of the housing, and then successively by part-filter units located above the first part-filter unit;
- and wherein matter trapped by said part-filter units drops by gravitational force to said lower end of said housing.
4 more elements
Dependencies are inferred from the claim text.