Hollow cast article with slit, method and apparatus for...

Optical waveguides – With disengagable mechanical connector – Structure surrounding optical fiber-to-fiber connection

Reexamination Certificate

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C385S070000, C385S052000, C385S058000, C385S060000, C385S065000, C385S066000, C385S077000, C385S078000, C385S084000, C385S138000, C264S001100, C264S001240, C264S001380, C264S002100, C264S002200, C264S002300

Reexamination Certificate

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06896417

ABSTRACT:
In the production of a hollow cast article having a slit, the release of a hollow cast product from a mold is carried out while opening the hollow cast product. In one embodiment, a core provided with recessed parts (or projected parts) formed in a slit forming part (or an outer peripheral part) is used and the drawing out of the core from the hollow cast product is carried out while opening the hollow cast product by means of the recessed parts (or projected parts) mentioned above. By such a method, a hollow cast article having a slit and projected parts (or recessed parts) formed in a slit part or/and an inner peripheral part thereof is obtained. In the case of the use of a core having a slit forming part of a taper-shaped ridge of which width gradually decreasing from a large width at one end to a small width at the other end, the core is drawn out from the hollow cast product in the direction to the other end of small width to open the hollow cast product by means of the slit forming part of the taper-shaped ridge.

REFERENCES:
patent: RE31515 (1984-02-01), Heldt
patent: 4714318 (1987-12-01), Hayashi et al.
patent: 5239603 (1993-08-01), Sonoda et al.
patent: 5390270 (1995-02-01), Hanzawa et al.
patent: 5446817 (1995-08-01), Kardos et al.
patent: 5621834 (1997-04-01), Anderson et al.
patent: 5992295 (1999-11-01), Noda et al.
patent: 6213649 (2001-04-01), Omiya et al.
patent: 6-27348 (1994-02-01), None
patent: 09-090169 (1997-04-01), None
patent: 10-311923 (1998-11-01), None

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