Plastic article with interrupted interior threads for securing a

Details Plastic article with interrupted interior threads for securing a Plastic article with interrupted interior threads for securing a

1995-07-24

1997-09-16

Watkins, William

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428 357, 428 99, 428119, 411437, 257717, 257706, 257718, 257719, 257727, H01L 2340

Patent

active

056678703

ABSTRACT:
A article with interior interrupted threads and a mold apparatus for manufacturing the same is provided. The molded article includes an aperture positioned completely therethrough as defined by an inner wall. The inner aperture wall carries a series of thread segments positioned about the periphery of the inner wall to form an interrupted helical thread line. The thread segments create a female threaded aperture through the molded article for receipt of a male threaded member therein. The mold apparatus includes an upper half and a lower half. The upper half carries a cylindrical wall which is notched with its upper edge being beveled outwardly. The bottom half also carries a cylindrical wall which is notched as well as beveled outwardly. The two cylindrical wall top edges meet together with respective beveled edges of each notched portion of the cylindrical walls being positioned adjacent one another to form a series of thread matrices for molding thread segments on the inner wall of the aperture through the molded article.

REFERENCES:
patent: 1069451 (1913-08-01), Marston
patent: 3433119 (1969-03-01), Ballantyne et al.
patent: 3482814 (1969-12-01), Hedgewick
patent: 3618170 (1971-11-01), Owens
patent: 3904165 (1975-09-01), Den Boer
patent: 4019711 (1977-04-01), Altenhof et al.
patent: 4188178 (1980-02-01), Anscher
patent: 4299520 (1981-11-01), Iwata
patent: 4558494 (1985-12-01), Kraus
patent: 4721220 (1988-01-01), Northup
patent: 4938679 (1990-07-01), Pietrorazio
patent: 5313099 (1994-05-01), Tata et al.
patent: 5397919 (1995-03-01), Tata et al.

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