| 摘要 |
A filter consisting of a conventional filter medium mounted between retaining layers of a porous fabric cut to fit the shape of the opening in the mechanism in which it is to be mounted. A tab extends from one edge of the filter. Around the outer periphery of one of the retaining layers is a layer of adhesive which is, in turn, covered by a protective layer of paper, cardboard or the like. Upon removal of the protective layer, the filter is held in place by the layer of adhesive against its mounting. The protective paper is left on a portion of the tab, thereby, reinforcing the tab and allows it to remain free to manipulate the filter assembly during installation and removal.
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