Metal deforming – With cutting – By composite tool
Patent
1985-12-30
1987-12-08
Crane, Daniel C.
Metal deforming
With cutting
By composite tool
72327, 72334, 72337, 72 47, 72379, 360135, 428579, B21D 2826, B21K 176
Patent
active
047111151
ABSTRACT:
A flat, smooth material, e.g., metal sheet, suitable for use as a disc substrate for applying a recording media thereto for data storage devices, and a method of making same, are disclosed. The flat and smooth substrate is formed by applying sufficient pressure to opposite surfaces of the material to achieve the desired flatness and smoothness prior to finishing. Subsequent finishing may be used to remove any zone of roughness which may be present in the surfaces of the disc resulting from the pressing step. In one embodiment, the pressure step may be applied before finishing the disc perimeters.
REFERENCES:
patent: 1434190 (1922-10-01), Bird
patent: 2650886 (1953-09-01), Zelley
patent: 2676916 (1954-04-01), Zelley
patent: 3554798 (1971-01-01), Nacci
patent: 3635067 (1972-01-01), Hanas
patent: 3738818 (1973-06-01), Stone et al.
patent: 4071360 (1978-01-01), Mannino, Jr.
patent: 4374795 (1983-02-01), Keilp et al.
patent: 4393628 (1983-07-01), Ottman et al.
patent: 4412870 (1983-11-01), Vernam et al.
patent: 4430387 (1984-02-01), Nakagawa et al.
patent: 4435343 (1984-03-01), Ando et al.
patent: 4435973 (1984-03-01), Nakazawa et al.
Metals Handbook, "Heat Treating, Cleaning and Finishing," ASM Handbook Commitee, American Society for Metals, Ohio, vol. 2, 8th Edition, 1964, p. 599.
Judge John S.
Kilgore Colin H.
Sukonnik Israil M.
Alexander Andrew
Aluminum Company of America
Crane Daniel C.
Taylor John P.
LandOfFree
Method for forming memory discs by forging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for forming memory discs by forging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for forming memory discs by forging will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-16497