Chemistry: electrical and wave energy – Processes and products
Patent
1977-06-27
1979-01-02
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
204 25, C25D 102, C25D 704
Patent
active
041326075
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 if 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: 2592614 (1952-04-01), Stoddard, Jr.
patent: 3187639 (1965-06-01), Kelly et al.
patent: 3512252 (1970-05-01), Sargent
Product Engineering, June 5, 1961, pp. 609-614.
Glaeser, Jr. George L.
O'Neill Daniel R.
Painter Alan
Johansen W. Edward
Telex Computer Products, Inc.
Tufariello T. M.
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