Molding a leaching chamber sidewall

Details Molding a leaching chamber sidewall Molding a leaching chamber sidewall

2005-11-29

2009-12-15

Del Sole, Joseph S. (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

C425S438000, C425S577000, C425SDIG058, C264S334000

Reexamination Certificate

active

07632447

ABSTRACT:
An arch shape cross section thermoplastic leaching chamber, having sidewall slot perforations which flare inwardly, is made using a mold comprised of a mold cavity part and an inwardly retractable mold core part. The core part has opposing side slides with projections that define the perforations; they are separated by a center block. The center block moves downwardly and the slides move inwardly, under action of slide rods built into the mold core, to enable a molded chamber to be removed from the mold.

REFERENCES:
patent: 4759661 (1988-07-01), Nichols et al.
patent: 5046892 (1991-09-01), Kothmann
patent: 5167898 (1992-12-01), Luther
patent: 5925303 (1999-07-01), Scheliga
patent: 6387311 (2002-05-01), Lacour et al.
patent: 2002/0044833 (2002-04-01), Kruger et al.

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