Electric heating – Microwave heating – Tunnel furnace
Patent
1974-07-19
1976-08-10
Roberts, Edward L.
Electric heating
Microwave heating
Tunnel furnace
219328, 310 87, B01F 1102
Patent
active
039737608
ABSTRACT:
Apparatus for the ultrasonic cleaning and sterilization of soft contact lenses and fenestrated hard contact lenses at a temperature that is low relative to that of pasturization is disclosed. A transducer element is electrically connected to a source of oscillating current to produce mechanical oscillating motion. A capsule is provided which is adapted to contain a biologically inert solution in which the soft contact lenses are immersed and the capsule is then hermetically sealed but not pressurized. Apparatus is provided for demountably connecting the capsule to the transducer element so that a continuous spanwise mechanical coupling is provided from the transducer to this surface of the capsule. A tuner element may be interposed in the connecting apparatus. The lower surface of the capsule is vibrated at a preselected ultrasonic frequency to induce ultrasonic waves in the solution in the capsule and to heat the solution in a controlled manner to clean and sterilize the soft contact lenses therein. The solution in the capsule is sterilized as well, giving rise to alternative uses of the instant invention.
REFERENCES:
patent: 2498990 (1950-02-01), Fryklund
patent: 2855526 (1958-10-01), Jones
patent: 3720402 (1973-03-01), Cummins
patent: 3851861 (1974-12-01), Cummins
Browning Iben
McClure Robert E.
McClure Robert E.
Roberts Edward L.
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