Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Reexamination Certificate
2006-02-14
2006-02-14
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
C366S182100, C425S130000, C425S557000, C425S562000
Reexamination Certificate
active
06997690
ABSTRACT:
A low-pressure mold valve assembly includes a coupler to removably attach a mix head to a mold assembly in an assembly line environment. A first piston which is rectilinear in cross section is movable within the first flow passage along a first axis by an actuator. A second piston is movable along a second axis substantially perpendicular to the first axis by a second actuator. After injection is complete, the second piston seals a mix chamber of the mix head while remnants of the matrix that remain in a flow passage are driven into the first flow passage by the piston. The first piston is then driven toward the mold port such that matrix remnants are further driven into the mold cavity. The coupler is thus cleared of remnants without flushing.
REFERENCES:
patent: 4188356 (1980-02-01), Weber et al.
patent: 4239732 (1980-12-01), Schneider
patent: 4898327 (1990-02-01), Sperry et al.
patent: 5240325 (1993-08-01), Monchiero
patent: 5435710 (1995-07-01), Gumery et al.
patent: 5498151 (1996-03-01), Nennecker
patent: 5562883 (1996-10-01), Salisbury et al.
patent: 5817347 (1998-10-01), Tamcsin et al.
patent: 6143214 (2000-11-01), Barlow
Merriam-Webster's Collegiate Dictionary, p. 978, 1996.
Bellasalma Gerard Jay
Kim Joon Taek
Ramsey Lloyd
Carlson & Gaskey & Olds
Heitbrink Tim
Masco Corporation
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