Patents Represented by Law Firm Trexler, Bushnell, Giangiorgi & Blackstone, Lt
  • Patent number: 5292437
    Abstract: A reusable multilayer filter for use with a beverage brewing apparatus. The multilayer filter includes a foraminous support player, a porous mesh layer and a multiplicity of wrinkles formed in the porous mesh layer. The foraminous support layer has a multiplicity of spaced apart holes extending through the layer. The porous mesh layer overlies and is attached to the foraminous support layer. The mesh layer is formed of a woven, etched, or deposited material which has a multiplicity of small openings extending therethrough. The openings in the porous mesh layer are smaller than the holes in the foraminous support layer for selectively retaining material having a dimension larger than the openings. The wrinkles in the porous mesh layer are formed in spaced apart areas which are defined by a perimeter of the holes in the foraminous support layer. The wrinkles increase the effective surface area of the filter.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: March 8, 1994
    Assignee: Bunn-O-Matic Corporation
    Inventor: David F. Ford