Agitating – Having specified feed means – Adjustable mixing ratio control
Patent
1988-04-04
1989-09-12
Hornsby, Harvey C.
Agitating
Having specified feed means
Adjustable mixing ratio control
118310, 222 44, 222 63, 222504, 222556, G05D 1113, G05D 1103, B05C 500
Patent
active
048654582
ABSTRACT:
Apparatus for mixing granules of different colors for use in surfacing for example asphalt shingles in which the valve opening is controlled automatically, the valve being opened by a drive having a fixed valve opening travel and the different valve open positions being determined by intially presetting the valve opening drive by operating it a predetermined amount from a home position in the direction opposite from the valve opening direction, reversing the drive motor to return it to the home position while recording the motion as a part of the fixed valve opening motion, and reenergizing the drive to complete the valve opening motion. The apparatus is also adapted to be operated manually in the event of a malfunction or power failure and it is provided with diamond-shaped orifices whereby the valve opening is a function of the square of the percent of valve travel to provide more accurate control in the low valve opening ranges.
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Georgia-Pacific Corporation
Haugland Scott J.
Hornsby Harvey C.
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