Gas separation – With means securing or retaining separating media – Unit or cohesive sheet-like media in flow line or frame
Reexamination Certificate
2007-06-26
2007-06-26
Smith, Duane (Department: 1724)
Gas separation
With means securing or retaining separating media
Unit or cohesive sheet-like media in flow line or frame
C055S521000, C055S524000, C055SDIG007, C055SDIG039, C493S346000, C493S347000, C493S359000, C493S381000, C156S040000, C156S066000, C156S205000, C156S210000, C156S474000, C156S197000, C156S324000, C264S286000, C264S287000
Reexamination Certificate
active
10888602
ABSTRACT:
The method of forming pleated filter media includes providing a generally planar web of filter material, folding the web to form a pleated web having a plurality of fold lines, arranging the plurality of pleats in a first spaced configuration defined by a first distance between adjacent pleat tips, applying a continuous strand of adhesive to the web, and adjusting the arrangement of the plurality of pleats into a second spaced configuration defined by a second distance between adjacent pleat tips. The web has a front face and a rear face. Each fold line is intermediate oppositely sloping first and second wall surfaces. The plurality of fold lines form a plurality of pleats having a first plurality of pleat tips and a second plurality of pleat valleys. The second distance is different from the first distance.
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Christensen Lowell E.
Duffy Dean R.
Sundet Douglas C.
Young Donald E.
3M Innovative Properties Company
Patchett David B.
Smith Duane
Wu Ives
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