Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Patent
1998-06-16
2000-05-23
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
26417317, 26417716, 425380, 425465, 425466, B29C 4718, B29C 4706
Patent
active
060662816
ABSTRACT:
A machine and method of extruding a fastener product is disclosed. The product has a continuous, sheet-form base and rows of discrete fastener elements that extend from a side of the base, and is formed by extruding a molten polymer through an extrusion die defining a die opening comprising a base opening for extrusion of the base of the product, and, contiguous therewith, a series of fastener element openings for extrusion of the rows of fastener elements, each fastener element opening having a profile configured to form oppositely directed sides of the discrete fastener elements of one row. While extruding the product, flow of polymer through the fastener element openings is periodically interrupted while continuing the flow of the polymer through the base opening, thereby forming rows of upstanding fastener elements integrally extruded with a sheet-form base. Fastener products formed by this method are also disclosed.
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Eashoo Mark
Silbaugh Jan H.
Velcro Industries B.V.
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