| 摘要 |
A self contained filter assembly for cleaning air and gas which is light-weight, inexpensive and easily disposable. The filter assembly includes a housing having walls formed of corrugated cardboard. A paper filter element in the form of a paper web is positioned in the housing and is folded in an accordian-like manner to form a plurality of web portions. The web portions form pockets which alternately open in the direction of flow of the air or gas being cleaned. Spacer elements positioned in the web pockets are fastened to the side walls of the housing to reinforce the housing and to counteract outwardly and inwardly lateral forces acting on the housing walls. The spacer elements also are shaped to resist bending along their lengths and to absorb tensile and compression forces occurring in the direction of flow of the air through the housing. |
