| 摘要 |
A sleeve or wrap that fits over a cartridge type filter whereby enhancing the effectiveness of that filter. A preferred embodiment of the invention is to fabricate this sleeve or wrap using the category of material commonly referred to as "nonwoven" taking advantage of one or more of the functional properties possible with the composition of this material such as the ability to capture large debris, filter out chemical elements, absorb oils and many other advantages beneficial to the filtering process. This sleeve or wrap may be fabricated as a one piece tube that slides snugly over the filter. Supplied as a blanket or wrap with a thin strip of hook material along one edge similar to that used in a "Velcro tm" hook and loop fastening system and with the nonwoven material of the wrap acting as the loop so the wrap may be fit snugly over a broad range of diameter filters. Another possible embodiment is to manufacture a tube or cylinder of a diameter calculated to be larger than the filter and with a rigid strip fastened horizontally to the cylinder which will facilitate easy placement over the filter then twisting the rigid strip effectively places a fold in the cylinder reducing the diameter to fit snugly around the filter. This sleeve, being porous may be slipped over the filter while in place and with the pump drawing water through it so as to trap the accumulation on the filter making it possible to remove the filter for cleaning without loosing any accumulation back into the body of water being filtered.
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