Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Reexamination Certificate
2007-08-01
2009-08-25
Huson, Monica A (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
C264S171100, C264S172190, C264S177100
Reexamination Certificate
active
07578956
ABSTRACT:
A method of making a touch fastener includes continuously introducing molten resin to a pressure zone at a peripheral surface of a rotating mold roll, such that pressure in the pressure zone forces some of the resin into an array of stem cavities defined in the mold roll to form resin stems while a remainder of the resin forms a base at the roll surface, interconnecting the stems. The method includes forming engageable heads on the stems to form fastener elements and introducing a quantity of discrete, loose particles to the resin at an entrance to the pressure zone, such that the particles become part of the base.
REFERENCES:
patent: 4374888 (1983-02-01), Bornslaeger
patent: 5785784 (1998-07-01), Chesley et al.
Fish & Richardson P.C.
Huson Monica A
Velcro Industries B.V.
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