Apparatus and method for forming micro spike liners and a micro

Details Apparatus and method for forming micro spike liners and a micro Apparatus and method for forming micro spike liners and a micro

1997-08-25

2000-10-17

Loney, Donald

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428141, 428120, B32B 300

Patent

active

061328456

ABSTRACT:
An apparatus and methods for forming micro spike thermoplastic liners and micro spike thermoplastic liners formed thereby are provided. A textured thermoplastic liner having at least one roughened surface with a plurality of irregularly shaped projections extending therefrom is disclosed. The thermoplastic liner of the subject invention is formed by using a calendering roll having a generally cylindrically shaped body with a non-smooth outer surface and a plurality of blind apertures, each having an irregularly shaped opening formed coextensively with the non-smooth surface. The liner is formed by having the non-smooth surface of the calendering roll impress a roughened pattern onto the liner and simultaneously form the plurality of irregularly shaped projections. The calendering roll is formed by initially drilling a plurality of blind apertures and, subsequently, roughening the outer surface of the roll such that the openings of each of the apertures are each caused to be irregularly shaped.

REFERENCES:
patent: 3895153 (1975-07-01), Johnston et al.
patent: 4183978 (1980-01-01), Hefele
patent: 4488918 (1984-12-01), Jofs
patent: 4612152 (1986-09-01), Kawabata et al.
patent: 4885201 (1989-12-01), Brandt
patent: 5075135 (1991-12-01), Brandt
patent: 5258217 (1993-11-01), Lewis
Figs. 1-4 of U.S. Design Patent Application Serial No. 29/048,977.

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