Sleeve molding

Details Sleeve molding Sleeve molding

2004-07-12

2009-11-10

Lee, Edmund H. (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

C264S513000, C264S537000

Reexamination Certificate

active

07615176

ABSTRACT:
Sleeve molding apparatus and methods for making multi-layer injection molded plastic articles in successive mold cavities. In a first molding step, an inner sleeve is molded on a core in a first mold cavity, which may comprise a full body length sleeve or only a partial sleeve, such as an upper neck finish portion. The sleeve and core are withdrawn from the first mold cavity while the sleeve is still warm, and transferred without substantial delay to a second mold cavity for injection molding an outer layer which bonds to the inner sleeve. By transferring the sleeve at an elevated temperature into the second mold cavity, an improved bond is formed between the inner sleeve and outer layer which resists separation during a later reheat stretch blow molding step, and/or in use of the resulting article. In a preferred embodiment, a pasteurizable beer container is provided having a finish-only sleeve of a PEN polymer. In a second embodiment, a returnable and refillable water container is provided having a full-length body sleeve of a PEN polymer. A multi-station injection molding apparatus is provided having a transfer mechanism, such as a rotatable turret or reciprocating shuttle, for cost-effective manufacture of preforms simultaneously in multiple cavity sets.

REFERENCES:
patent: 3086249 (1963-04-01), Nelson et al.
patent: 3224043 (1965-12-01), Lameris et al.
patent: 3943219 (1976-03-01), Aoki
patent: 4293520 (1981-10-01), Akutsu
patent: 4307137 (1981-12-01), Ota et al.
patent: 4321029 (1982-03-01), Aoki
patent: 4330257 (1982-05-01), Rees et al.
patent: 4342895 (1982-08-01), Krishnakumar et al.
patent: 4347209 (1982-08-01), Suzuki
patent: 4396816 (1983-08-01), Krishnakumar et al.
patent: 4398642 (1983-08-01), Okudaira et al.
patent: 4407651 (1983-10-01), Beck et al.
patent: 4413974 (1983-11-01), Kontz
patent: 4449913 (1984-05-01), Krihnakumar et al.
patent: 4476364 (1984-10-01), Prevot et al.
patent: 4507258 (1985-03-01), Aoki
patent: 4589559 (1986-05-01), Havashi et al.
patent: 4590021 (1986-05-01), Ota et al.
patent: 4609516 (1986-09-01), Krishnakumar et al.
patent: 4715504 (1987-12-01), Chang
patent: 4731513 (1988-03-01), Collette
patent: 4744742 (1988-05-01), Aoki
patent: 4786455 (1988-11-01), Krishnakumar et al.
patent: 4830811 (1989-05-01), Aoki
patent: 4885121 (1989-12-01), Patel
patent: 4923723 (1990-05-01), Collette et al.
patent: 4933135 (1990-06-01), Horwege et al.
patent: 5030406 (1991-07-01), Sorensen
patent: 5032341 (1991-07-01), Krishnakumar et al.
patent: 5034177 (1991-07-01), Niimi et al.
patent: 5049345 (1991-09-01), Collette et al.
patent: 5141695 (1992-08-01), Nakamura
patent: 5221507 (1993-06-01), Beck et al.
patent: 5354532 (1994-10-01), Nakai et al.
patent: 5443766 (1995-08-01), Slat et al.
patent: 5447766 (1995-09-01), Orimoto et al.
patent: 5492467 (1996-02-01), Hume et al.
patent: 5571470 (1996-11-01), Plester
patent: 5599598 (1997-02-01), Valvi
patent: 5628957 (1997-05-01), Collette et al.
patent: 5804016 (1998-09-01), Schmidt et al.
patent: 6428737 (2002-08-01), Collette et al.
patent: 6787094 (2004-09-01), Collette et al.
patent: 0302117 (1989-02-01), None
patent: O 302 117 (1989-02-01), None
patent: A 2538297 (1984-06-01), None
patent: A 1482956 (1977-08-01), None
patent: A 2011309 (1979-07-01), None
patent: 2117698 (1983-10-01), None
patent: A 61-002519 (1986-05-01), None
patent: A 61185417 (1986-08-01), None
patent: 5-73568 (1993-10-01), None
patent: WO 95/00325 (1995-01-01), None
patent: WO 95/07219 (1995-03-01), None
patent: WO 95/22451 (1995-08-01), None
European Search Report mailed Sep. 30, 2005 in corresponding European Application No. 04077346.7.

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