Gas blowing plug and manufacturing method therefor

Details Gas blowing plug and manufacturing method therefor Gas blowing plug and manufacturing method therefor

2005-03-29

2005-03-29

Kastler, Scott (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

C266S220000, C266S217000

Reexamination Certificate

active

06872344

ABSTRACT:
A gas blowing plug and a manufacturing method therefor wherein the gas blowing plug includes a slit-shaped gas passage (22) ranging from the bottom to the top of the plug. The gas passage (22) is continuous or discontinuous in a horizontal cross section of the plug. The slit-shaped gas passage (22) is also continuous from the bottom to the top of the plug and slit-shaped gas passage (26) is discontinuous in a vertical cross section of the plug. In one example, the cross-sectional shape of the slit-shaped gas passage (22) is a pointed star.

REFERENCES:
patent: 5225143 (1993-07-01), Labate et al.
patent: 5423521 (1995-06-01), Stover et al.
patent: 5855843 (1999-01-01), Wandschneider
patent: 6129889 (2000-10-01), Slamenik et al.
patent: 6551550 (2003-04-01), Aramaki et al.

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