Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling rate of movement of molding material or its...
Reexamination Certificate
2006-02-21
2006-02-21
Eashoo, Mark (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling rate of movement of molding material or its...
C264S070000, C264S173160, C264S173190, C264S177160, C425S131100, C425S133100, C425S132000, C425S462000
Reexamination Certificate
active
07001547
ABSTRACT:
A method and apparatus are described for coextruding two materials A and B, in which B is extruded on A through a port (3), in which the separating wall between the flows of A and B is formed as a flap closure (4) adapted to act as a non-return valve for the flow of B into A, and further means are provided for extruding B through the port in pulses. The pulses may be effected by opening and closing the closure, by mechanical transmission means or by the effect of imposing pressure difference on the flap (4) by the flows of A and/or B. The pulsing means preferably involves rams (1). The invention is particularly suitable for extruding a low viscosity material B onto a higher viscosity material A, or for making sheets or pipes with alternating segments of differential flexibility, or for coextruding a flow of solid particles with a flow of liquid.
REFERENCES:
patent: 3761211 (1973-09-01), Parkinson
patent: 4039364 (1977-08-01), Rasmussen
patent: 4152387 (1979-05-01), Cloeren
patent: 4197069 (1980-04-01), Cloeren
patent: 4368017 (1983-01-01), Rasmussen
patent: 4469475 (1984-09-01), Krysiak
patent: 4533308 (1985-08-01), Cloeren
patent: 5062782 (1991-11-01), Tompkins et al.
patent: 5108682 (1992-04-01), Tompkins et al.
patent: 5928679 (1999-07-01), Ohki et al.
patent: 6024557 (2000-02-01), Feuerherm
Daniel William J.
Eashoo Mark
LandOfFree
Method and apparatus for joining sheet- or ribbon formed... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for joining sheet- or ribbon formed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for joining sheet- or ribbon formed... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3678951