Plastic article or earthenware shaping or treating: apparatus – With indicator – signal – recorder – illuminator – or inspection...
Reexamination Certificate
2007-03-06
2007-03-06
Mackey, James P. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With indicator, signal, recorder, illuminator, or inspection...
C425S224000, C425S812000
Reexamination Certificate
active
10936570
ABSTRACT:
A pipe for supplying a dope to a co-casting die consists of a gooseneck portion connected to a feed block of the co-casting die, and a straight pipe portion connected to the gooseneck portion. The gooseneck portion has a radius of curvature of 50 mm to 400 mm, and the straight pipe portion forms an angle of 0 to 20 degrees to the horizontal plane. Venting valves are opened up at the beginning of dope feeding. and are closed to some extent as the dope comes out. After the air is completely vented out, the venting valves are completely closed. Thereby, an air collection is completely let out from the pipe, a plastic web discharged from die lips of the co-casting die would not contain any air bubbles, it is prevented that the web splashes to put on the die lips, causing streaks on the produced film.
REFERENCES:
patent: 6767500 (2004-07-01), Yamazaki et al.
patent: 6887415 (2005-05-01), Yamazaki et al.
patent: 8-244053 (1996-09-01), None
patent: 2000-317961 (2000-11-01), None
Birch & Stewart Kolasch & Birch, LLP
Mackey James P.
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