Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Cutting and uniting cut parts
Patent
1994-04-12
1996-04-30
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Cutting and uniting cut parts
264238, 264318, 2643081, 264334, 425554, 425577, 425DIG58, B29C 4538, B29C 4544
Patent
active
055122280
ABSTRACT:
A tamper-evident thermoplastic fitment having a spout and a closure for said spout are welded to a polymer-coated paperboard container or to a flexible plastic container. The fitment and closure are initially molded simultaneously but with a substantial space between the two parts interconnected by an elongated runner which conducts molten plastic from the closure to the fitment. Upon retraction of the core of the mold, the closure is pulled into the spout until shoulders on the parts engage, whereupon the closure is stripped from the mold core. The runner comprises a tear tab which slides through an apertured space on the closure. When the parts engage tangs on the tear tab engage the space, making the assembly tamper-evident. The fitment has a flange which may be welded or otherwise secured to the container. The tab may be pulled by the consumer to open the container. The closure may be unscrewed from the spout or otherwise disengaged.
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patent: 5200132 (1993-04-01), Shfaram et al.
patent: 5348184 (1994-09-01), Adams et al.
Adams Brian M.
Chenault Rawson L.
Luch Daniel
Caplan Julian
Heitbrink Jill L.
Portola Packaging, Inc.
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