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Filter system

  • US 5,593,479 A
  • Filed: 02/02/1995
  • Issued: 01/14/1997
  • Est. Priority Date: 02/02/1995
  • Status: Expired due to Term
First Claim
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1. In a vacuum cleaner or air cleaner comprising a reduced velocity chamber with a high velocity air inlet, an electric motor, a rotary means driven by said motor for creating a vacuum in said chamber, an outlet for exhausting air from said chamber, said air flows in a selected path from said air inlet, through said chamber and out said air exhaust outlet, the improvement comprising:

  • filter means positioned between said air inlet and said motor for removing particles in said air, said filter means including at least one layer of electrically charged fiber material substantially encapsulated between at least two layers of support material, said layer of electrically charged fiber material and said at least two layers of support material connected together by at least one melted seam positioned substantially at the peripheral edge along the entire periphery of said filter means, said melted seam forming a substantially airtight barrier between said filter means layers.

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