Typewriting machines – Typing by other than type-face or type-die
Patent
1982-06-09
1984-07-17
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
494 65, 198658, 198803, B41J 302
Patent
active
044602863
ABSTRACT:
A centrifugal ball elevator for use in a microballistic impact printer or the like in which a hollow rotary member arranged on a generally vertical axis and having an inlet at the lower end and an outlet at the upper end is formed with an internal surface extending between the inlet and the outlet with a radius that increases from the inlet to the outlet. Balls to be elevated for recycling through the printer are supplied to the lower end of the surface through the inlet, while the member is rotated at such a speed as to impel the balls toward the outlet under the action of centrifugal force. In certain disclosed embodiments the internal surface is so formed as to entrap or filter out contaminants which have accumulated on the balls, while in another disclosed embodiment the internal surface is provided with a self-lubricating coating which lubricates the balls to reduce the abrasive effect of the balls on constricted portions of the printer through which they pass.
REFERENCES:
patent: 1712184 (1929-05-01), Wendel
patent: 2483342 (1949-09-01), Henrard
patent: 2967604 (1961-01-01), Topp
patent: 3904109 (1975-09-01), Underwood
patent: 4037984 (1977-07-01), Rafferty et al.
Savin Corporation
Sewell Paul T.
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