Minuteman International, Inc.

James V Allen

Kenneth A Kaczmarz

Brock E Robinson

John B Payson

Jerome E Rau

Michael A Rau

Ronald A Shelk

A microprocessor-controlled mobile machine for curing a floor coating includes a source of radiant energy in the form of ultraviolet (UV) light which is mounted to the machine. The machine may be operated in a Traverse mode under operator control of speed for moving to an application site. A Standby mode permits the UV applicator to operate at a quiescent state to reduce warm-up time while permitting the machine to be maneuvered by the operator. A Cure mode (of which there may be a plurality) operates the machine at predetermined, processor-controlled speed and the UV applicator at a predetermined power level.

Apparatus for curing floor coating

A floor care machine such as a burnisher may operate in a manual or automatic mode for controlling the operating pressure of the working unit, such as a brush or pad. The illustrated machine has a motor and pad driver assembly mounted for height adjustment by an actuator. In the automatic mode, a transducer senses motor current (i.e., load) and generates a signal representative of the actual operating pressure exerted by the pad on the floor. A microprocessor-based controller controls the actuator to adjust the height of the pad relative to the floor, and thus adjusts the pad pressure on the floor, according to a setting selected by the operator. The controller is programmed to reduce the effect of 'hunting' by entering a Lock Mode after operation has achieved predetermined conditions. System operation remains in the Lock Mode as long as other criteria are met, and operation returns to a Hunt Mode if these other criteria are not met. The operator may enter data into the controller to adjust the sensitivity of the system in the Hunt Mode and the Lock Mode for different applications or floor conditions.

Control system for floor care machine

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Lombard, IL, United States of America

James V Allen