Patent ID: 9522355
Filing Date: 2016-12-20
CPC Classification: B01D

Claim Text:
1. A pocket filter assembly for removing particles from an air or gas flow, comprising: a filter unit comprising a filter bag for removing particles from an air or gas flow, wherein said filter unit is arranged to receive at least one filter pocket, said filter bag comprising an opening portion and an end portion opposite said opening portion, said filter unit further comprising a frame arranged at at least a portion of a periphery of said opening portion, and a support structure arranged at at least a portion of a periphery of said end portion for stretching an area of said end portion, wherein said frame and said support structure act to stretch said filter bag into a substantially parallelepiped shape such that said filter unit, in a stretched state, is arranged to provide a free passage for said at least one filter pocket into and out of said filter bag, wherein said filter unit is arranged to fold between said frame and said support structure into a folded state, and wherein said pocket filter assembly further comprises a pre-filter unit comprising at least one filter pocket arranged for insertion into said filter unit, and a releasable connection between said pre-filter unit and said filter unit, the pre-filter unit including a filter material that is finer than a filter material of the filter unit.