Cleaning method for keyboard assemblies
AssigneeWang Laboratories, Inc.
InventorJoseph P. LaPlaca
Life of this patent
Estimating the term…
Abstract
A method for cleaning keyboards having Hall-effect, plunger-type keys that comprises the steps of immersing the keyboard in a mild detergent bath, subjecting this bath to ultrasonic vibrations, removing the keyboard from this bath, rinsing the detergent solution from the keyboard, and drying the keyboard by immersing said keyboard in a fluorinated solvent or baking said keyboard in a low temperature oven.
Claims20
A process for cleaning data entry keyboards, said keyboards having plunger-type, Hall-effect keys, the process comprising the steps of:
- (a) immersing the keyboard in a mild aqueous detergent solution;
- (b) subjecting said keyboard and solution to ultrasonic vibration;
- (c) removing the detergent from the keyboard;
- and
- (d) drying said keyboard.
A process for cleaning data entry keyboards, said keyboards having plunger-type, Hall-effect keys, the process comprising the steps of:
- (a) immersing the keyboard in a mild aqueous detergent solution;
- (b) subjecting said keyboard and solution to ultrasonic vibration at a level of approximately 60 to 85 dB;
- (c) removing the detergent from the keyboard by rinsing the keyboard with water;
- and
- (d) immersing said keyboard into a water-absorbing fluorinated solvent.
A process for cleaning data entry keyboards, said keyboards having plunger-type, Hall-effect keys, the process comprising the steps of:
- (a) immersing the keyboard in a lukewarm, mild, aqueous detergent solution;
- (b) subjecting said keyboard and solution to ultrasonic vibration at a level of approximately 60 to 85 dB for approximately one minute;
- (c) rinsing said keyboard with cold, de-ionized water for approximately one minute in a three-cascade bath to remove essentially all of the detergent solution;
- (d) blowing the keyboard with air-knives to remove excess water;
- and,
- (e) immersing said keyboard into a fluorinated solvent maintained at ambient temperature for approximately four to six minutes until essentially all of the rinse medium has been absorbed by the solvent.
Dependencies are inferred from the claim text.