Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Reexamination Certificate
2007-11-06
2007-11-06
Heitbrink, Jill L. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
C264S328170, C425S145000, C425S587000
Reexamination Certificate
active
10762329
ABSTRACT:
In a reciprocating (RS) injection unit environment, as shown in FIG.1, a controller of the injection unit is arranged to continuously rotate the screw during both conventional plasticizing operation and shot injection. In this way the RS unit is more efficient, utilizing less energy and producing greater resin output. The injection unit includes a non-return valve adjacent a nozzle, which non-return valve is either configured to rotate with the screw to reduce wear or presented as a ball check style noon-return valve. In an injection molding environment, the rotating screw includes flights that allow granules of resin to melt and mix in spaces between adjacent flights, but the flights are arranged substantially to inhibit excessive displacement of resin around the flights.
REFERENCES:
patent: 2629132 (1953-02-01), Willcox
patent: 2734226 (1956-02-01), Willert
patent: 2885734 (1959-05-01), Wucher
patent: 3002229 (1961-10-01), Friederich
patent: 3020591 (1962-02-01), Breher
patent: 3263276 (1966-08-01), Maier
patent: 3281899 (1966-11-01), Dacco
patent: 3728053 (1973-04-01), Stillhard et al.
patent: 3804381 (1974-04-01), Bielfeldt et al.
patent: 4256678 (1981-03-01), Fujita et al.
patent: 4722679 (1988-02-01), Farrell
patent: 5013231 (1991-05-01), Fujita et al.
patent: 5112213 (1992-05-01), Oas
patent: 6059556 (2000-05-01), Koike et al.
patent: 6284170 (2001-09-01), Hiraoka
patent: 6615637 (2003-09-01), Katsuta et al.
patent: 7074028 (2006-07-01), Watanabe et al.
patent: 2003/0034577 (2003-02-01), Seta et al.
Spirex Corporation website (www.SPIREX.com)—Product Description for an F-LOC Non Return Valve, 2002.
Knights, Mikell, “Know How: Injection Molded Furniture in a Slump,” Plastics Technology Online Article, www.plasticstechnology.com/articles/200302bib3.html, Feb. 2002.
Paris Alexandre Edouard Raoul
Weatherall Douglas James
Heitbrink Jill L.
Husky Injection Molding Systems Ltd.
Katten Muchin & Rosenman LLP
LandOfFree
Injection molding method and apparatus for continuous... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Injection molding method and apparatus for continuous..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Injection molding method and apparatus for continuous... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3883517