Method of making a unitary bowl, waterway, and trap for a toilet

Details Method of making a unitary bowl, waterway, and trap for a toilet Method of making a unitary bowl, waterway, and trap for a toilet

1979-02-26

1981-01-20

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

264541, 425525, B29C 1707, B29C 1710

Patent

active

042462274

ABSTRACT:
Disclosed are an integral plastic bowl, waterway and trap for a toilet and the method of making the product. The bowl is concave and leads into a trap which may be interconnected with a standard closet flange. The waterway is vertically aligned with the trap and slopes downwardly from an inlet to an outlet, which is preferably at a position near the bottom interior of the bowl and which also preferably includes a wall surface in overlying alignment with at least a portion of the downwardly sloping waterway portion. During flushing, water from a reservoir flows down the waterway, against the outlet wall surface causing a vortex in the bowl, and then out of the bowl into the trap. In the method of making the product, a plastic parison is positioned between the sections of a blow mold. Next, the mold sections are closed, pinching portions of the parison shut to partially form the trap and waterway and enclosing another parison portion in a bulbous mold cavity. Blow fluid under pressure is injected into the interior of the parison to form a blown article which is then removed from the mold and trimmed to form the final product.

REFERENCES:
patent: 3212106 (1965-10-01), Noel
patent: 3291670 (1966-12-01), Usab
patent: 3591868 (1971-07-01), Owens
patent: 3719209 (1973-03-01), Rush et al.
patent: 4070430 (1978-01-01), Confer

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