Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1994-11-18
1997-05-13
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Record medium
In container
G11B 2302
Patent
active
056298226
ABSTRACT:
A tape cassette shell has mating base and cover sections and azimuth posts that remain perpendicular with respect to the floor or ceiling of the shell sections during cooling after injection molding. At least two support ribs of substantially equal height are formed symmetrically around each azimuth post. Stress imposed on an azimuth post by one support rib due to contraction of the support rib material during cooling after injection molding is balanced by stress imposed on the azimuth post by other support ribs. As a result, the azimuth post remains substantially perpendicular to the floor or ceiling of the shell section during cooling after injection molding. A spring member having leg portions is mounted on support ribs behind the azimuth posts. The leg portions space the spring member up from the top surface of the support ribs. A family mold for forming at least one of each of the cover and base sections is designed so that each section is comprised of substantially equal amounts of material, and so that the sections are symmetric about a centerline. As a result, the fill time of the family mold, and the stress imposed on the family mold by the injection pressure are minimized.
REFERENCES:
patent: 3642228 (1972-02-01), Tollkuhn
patent: 3684203 (1972-08-01), Tollkuhn
patent: 4096538 (1978-06-01), Oishi
patent: 4097006 (1978-06-01), Saito
patent: 4110805 (1978-08-01), Oishi
patent: 4126283 (1978-11-01), Kawachi
patent: 4166593 (1979-09-01), Milants
patent: 4392169 (1983-07-01), Boullart et al.
patent: 4506846 (1985-03-01), Gelardi et al.
patent: 4682258 (1987-07-01), Satoh et al.
patent: 4699018 (1987-10-01), Oishi et al.
patent: 4731687 (1988-03-01), Kagano et al.
patent: 4735378 (1988-04-01), Kagano et al.
patent: 4780782 (1988-10-01), Bordignon
patent: 4922361 (1990-05-01), Bordignon
patent: 5086363 (1992-02-01), Katagiri et al.
patent: 5096136 (1992-03-01), Sato et al.
Rich Richard F.
Roe James R.
Cao Allen
Levy Stuart S.
Loran Cassettes and Audio Products
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