Advancing material of indeterminate length – By orbitally traveling material-engaging surface – With drive means
Patent
1975-12-29
1977-12-27
Stoner, Jr., Bruce H.
Advancing material of indeterminate length
By orbitally traveling material-engaging surface
With drive means
29132, 226 95, 226190, 226193, B65H 1720
Patent
active
040650448
ABSTRACT:
The present invention is an improved capstan which is used in a magnetic tape transport system, to accelerate a length of magnetic tape. The capstan includes a cylindrical post, adapted to be connected to a drive shaft of a capstan motor in a magnetic tape transport system, a pair of discs, each of which has a set of outer holes disposed adjacent to and distributed about its periphery and a set of inner holes disposed adjacent to and distributed about its central axis, coupled together by the cylindrical post disposed about their central axes. The capstan also includes a first set of cylindrical posts, coupling the inner holes of one disc to the inner holes of the other disc, and a second set of cylindrical posts, coupling some of the outer holes of one disc to some of the outer holes of the other disc. The capstan further includes a cylindrical tape band, which has a set of grooves running concentrically with the discs and the other edges of which are joined to the peripheries of the discs. The capstan is formed by a two step process of plating a platen in the shape of the capstan with a metal, such as nickel, and then dissolving or etching away the platen in a selected solution. The resulting capstan not only has a relatively large diameter with a low moment of inertia, but also a low mass without sacrificing its structural strength.
REFERENCES:
patent: 3122295 (1964-02-01), Davison et al.
patent: 3143267 (1964-08-01), Maxey
patent: 3930603 (1976-01-01), Grant
R. B. Chatto et al., "Tape Drive Capstan" IBM Technical Disclosure Bulletin, vol. 15, No. 6, Nov. 1972, pp. 1882, 1883.
Glaeser, Jr. George L.
O'Neill Daniel R.
Painter Alan
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