Air-platen bearing

Details Air-platen bearing Air-platen bearing

1978-05-23

1983-10-25

Hayes, Monroe H.

Optics: motion pictures

Gates

Fluid pressure type

308DIG1, 308 5R, 226 97, G03B 152

Patent

active

044115032

ABSTRACT:
A fluid bearing platen for a film gate structure contains a pair of cavities to which pressurized fluid, such as air, to be applied against the opposing surfaces of a photographic film, is supplied. Between each respective cavity and one side of the film there is disposed a thermodynamically non-throttling material, such as porous stainless steel, through which the pressurized fluid from the cavities passes, to be directed against the opposite sides of the film. The non-throttling material effectively creates an adiabatic transfer from the cavities to the film's opposing surfaces, thereby eliminating temperature loss and avoiding the wrinkling or warpage of the film.

REFERENCES:
patent: 1231360 (1917-06-01), Howell
patent: 2571868 (1951-10-01), Haller
patent: 2645534 (1953-07-01), Becker
patent: 2691320 (1954-10-01), Borberg
patent: 2696410 (1954-12-01), Topanelian
patent: 3103850 (1963-09-01), Khoury et al.
patent: 3156399 (1964-11-01), Wadey
patent: 3457007 (1969-07-01), Conroy
patent: 3885417 (1975-05-01), Stern
IBM Technical Disclosure Bulletin, vol. 15, No. 6, Nov. 1972.
IBM Technical Disclosure Bulletin, vol. 5, No. 4, Sep. 1962.
RCA Technical Notes, RCA TN No. 457, Sep. 1961.
Modulated Air Blast for Reducing Film Buckle, by Willy Borberg, JSMPTE, vol. 59, pp. 94-100, Aug. 1952.

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