Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1987-12-01
1989-02-28
Jillions, John M.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
B65H 7514
Patent
active
048078263
ABSTRACT:
A tape reel structure for a tape cassette provides radially extending ribs between an outer cylindrical section forming a tape reel section to be wound therearound with a tape, and an inner cylindrical section serving as a reel shaft boss. The rib at least has a portion extending substantially through an overall length of the outer cylindrical section so as to prevent radially inward deformation thereof. The rib joins with the inner cylindrical section at the inner edge. The upper end of the joining portion between the inner edge of the rib and the inner cylindrical section is oriented at lower elevation than that the upper end of the joining portion between the outer edge of the rib and the outer cylindrical section. This height difference is effective for preventing the outer cylindrical section from forming wave-form uneveness during a molding process. The ribs extending substantially the overall length of the outer cylindrical section successfully prevent the outer cylindrical section from radially inward bending.
REFERENCES:
patent: 4176804 (1979-12-01), Nemoto et al.
patent: 4203564 (1980-05-01), Nemoto et al.
patent: 4254919 (1981-03-01), Moodie
patent: 4403749 (1983-09-01), Nakagawa
patent: 4452404 (1984-06-01), Gelardi et al.
patent: 4564156 (1986-01-01), Cybulski
patent: 4664328 (1987-05-01), Yamada
Research Disclosure, No. 225, Jul. 1985, No. 25552, pp. 369-371, Emsworth Hampshire.
Jillions John M.
Kananen Ronald P.
Sony Corporation
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