| 摘要 |
A filter bag (18) is slipped over the mounting frame which comprises a rigid brace consisting of a rectangular frame (10) extending on three sides of the brace, a support flange (16) on the periphery of an elongate passage (9) provided in a base plate (4), and an outlet vent (20) for the filtered air. The vent is made up of an open flat conduit extending the support flange and integrally attached to the lateral sides of the frame. The walls of the bag (18) are separated from one another by a set of unblocking springs (23) fitted between the side (13) of the frame (10) at the opposite end to the base plate and a hooking member situated in the neighbourhood of the outlet vent. The hooking member consists of tabs (26) whose ends are pierced with a hole, the said tabs being cut from the lower edges of the plates forming the vent (20) and folded back towards the middle of the opening of the said vent. <IMAGE>
|
