Cassette with Non-Uniform Liner Cavity

Abstract

A cassette for disposing waste is provided having a variable cross-sectional geometry. The cross-sectional geometry varies at least at two locations around the periphery of the cassette such that a first maximum height at a first location is different than a second maximum height at a second different location, and the first maximum width at a first location is different than a second maximum width at a second location.

1 . A film-dispensing cassette for a waste disposal device, comprising:
 a central passage;   a liner cavity for containing a supply of liner film, said liner cavity extends around said central passage, and said liner cavity having a cross-sectional geometry that varies around a perimeter of said cassette at least at two different points.   
     
     
         2 . The cassette of  claim 1 , wherein said area at a first position along the perimeter of the cassette having a cross-sectional geometry is generally equal to a second position along said perimeter of the cassette having a second cross-sectional geometry, where said first cross-sectional geometry is different from said second cross-sectional geometry. 
     
     
         3 . The cassette according to  claim 1 , wherein said cassette further comprises a bottom cavity wall defining the liner cavity. 
     
     
         4 . The cassette according to  claim 1 , wherein said cassette further comprises a top panel. 
     
     
         5 . The cassette according to  claim 4 , wherein said top panel has a tear strip located either proximal to the inner cavity wall, in the middle portion of the top panel, or a combination thereof. 
     
     
         6 . The cassette according to  claim 4 , wherein said top panel comprises ribs or protrusions. 
     
     
         7 . The cassette according to  claim 1 , wherein said inner cavity wall is generally arcuate. 
     
     
         8 . The cassette according to  claim 1 , wherein said outer cavity wall is generally arcuate. 
     
     
         9 . The cassette according to  claim 1 , further comprising a forward region, an aft region, a first side region, and a second side region,
 wherein said forward region has a forward region maximum height and a forward region maximum width,   wherein said aft region has an aft region maximum height and an aft region maximum width,   wherein said first side region has a first side maximum height and a first side region maximum width, and   wherein said second side region has a second side maximum height and a second side region maximum width.   
     
     
         10 . The cassette according to  claim 9 , wherein said first side maximum height is greater than or equal to said forward side maximum height. 
     
     
         11 . The cassette according to  claim 9 , wherein said first side maximum height is greater than or equal to said aft side maximum height. 
     
     
         12 . The cassette according to  claim 9 , wherein said first side maximum width is less than or equal to said forward side maximum width. 
     
     
         13 . The cassette according to  claim 9 , wherein said first side maximum width is less than said aft side maximum width. 
     
     
         14 . The cassette according to  claim 9 , wherein said second side maximum height is about equal to said first side maximum height. 
     
     
         15 . The cassette according to  claim 1 , wherein said cassette comprises a first side forward quadrant, a second side forward sector, a first side aft sector, and a second side aft sector,
 wherein said first side forward sector has a first sector maximum height and a first sector maximum width,   wherein said second side forward sector has a second sector maximum height and a second sector maximum width,   wherein said first side aft sector has a third sector maximum height and a third sector maximum width, and   wherein said second side aft sector has a fourth sector maximum height and a fourth sector maximum width.   
     
     
         16 . The cassette according to  claim 15 , wherein said first sector maximum height is less than or equal to said third sector maximum height. 
     
     
         17 . The cassette according to  claim 15 , wherein said second sector maximum width is less than or equal to said fourth sector maximum width. 
     
     
         18 . A cassette for a waste disposal device, comprising:
 a length of liner film for receiving waste, and   a central passage defined by at least three splines and positioned to receive said length of liner film therethrough, said central passage having a front region and an aft region, said central passage having a widthwise axis that is generally perpendicular to a depthwise axis, said widthwise axis and said depthwise axis intersecting at a midpoint of said central passage,   wherein said central passage has a maximum widthwise dimension and a maximum depthwise dimension that is generally perpendicular to said maximum widthwise dimension,   wherein said maximum widthwise dimension is less than said maximum depthwise dimension,   wherein said maximum widthwise dimension is positioned on or between said widthwise axis and said front region, and   wherein said maximum depthwise dimension is positioned along the depthwise axis.   
     
     
         19 . The cassette according to  claim 18 , wherein said cassette further comprises a liner cavity outward of said central passage, said liner cavity at least partially containing said length of liner film prior to use. 
     
     
         20 . The cassette according to  claim 18 , wherein said central passage has an arcuate shape, quadrilateral shape, polygonal shape, or combinations thereof.