Apparatus for producing an apertured plastic film having a tricot texture
AssigneeMcNeil-PPC, Inc.
InventorsChing-Yun Morris Yang, Charles Shimalla, Mordechai Turi
Life of this patent
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Abstract
An apparatus for producing an apertured plastic film having a tricot-like texture. The apparatus includes a film forming member comprising a rotatable hollow drum having a pattern of apertures and a topographical outer surface formed by a cluster of peaks and valleys surrounding each aperture. A plastic film is placed on the apices of the peaks and fluid streams are projected against the film while the drum is rotated. The fluid forces the film against the topographical outer surface of the drum causing the film to become apertured and to have a tricot-like texture corresponding to the pattern of apertures and peaks and valleys.
Claims2
An apparatus for producing an apertured film having a tricot texture, the apparatus comprising:
- a backing support member comprising a rotatable hollow drum having a cylindrical side wall and a pattern of apertures extending through the side wall from a top surface to a bottom surface, the top surface having a topography comprising a plurality of peaks and valleys, each of said apertures being surrounded by a cluster of the peaks and valleys formed in the sidewall, the apertures each having a section just below the valleys which has the shape of a truncated cone whereby the aperture diameter at the top surface of said section is greater than the aperture diameter at the bottom surface of said section, the pattern of apertures, peaks, and valleys being adapted to produce a film having a tricot texture;
- means for positioning a stretchable thermoplastic polymer film on the apices of the peaks on the top surface of the drum;
- means located outside the drum for projecting adjacent fluid streams simultaneously against said film and then against the peaks and then through the apertures and into the drum;
- means for rotating the drum while said fluid is being projected against the top surface;
- means disposed inside the drum to remove the fluid from the top surface of the drum;
- and
- means for removing the apertured film having a tricot texture from the top surface of the drum.
Dependencies are inferred from the claim text.