Patent ID: 6350223
Filing Date: 2002-02-26
Classification: D06F

Abstract:
A roll assembly in an article folding apparatus comprising:a hollow cylindrical shell having a thickness, an outer circumferential surge divisible by an integer, an inside surface, a central shaft having journals for rotational support in a frame, and shell support means from said central shaft, at least one vacuum conduit having open portions of one surface in superposed relationship with said inside surface, one end closure, and a rotating connection to an external vacuum source at the other end, said vacuum conduit communicating with radial channels in said shell and at least one plurality of vacuum ports in the outer surface of said cykindrical shell, said central shaft for rotation about an axis, a plurality of means to support said shell from said central shaft, wherein said plurality of vacuum ports includes at least a first pattern of vacuum ports in the leading portion of a repeat surface located on one side of a first fold line and at least one second pattern of vacuum holes in the trailing portion of a repeat surface located on the other side of said first fold line, and, wherein said vacuum conduit has flat surfaces, one of which contacts the inside surface of said shell.