Dispensing – Processes of dispensing
Patent
1981-05-07
1984-07-10
Rolla, Joseph J.
Dispensing
Processes of dispensing
222 14, 222 63, 222 64, 222136, 222 77, 222318, B67D 508
Patent
active
044588275
ABSTRACT:
Two measuring cups (5, 6) are alternately filled and emptied. The fill st is determined by an overflow, and the emptying time during which a withdrawal pump (30) is connected to the respective cup is determined by scanning pump revolutions. The scanned pump revolutions for emptying are compared with a desired pumping rate, entered into a counter (50) which decrements in accordance with revolutions of the pump (30), and, if a deviation from commanded pumping rate is sensed, a correction memory (60) is loaded which controls over a control unit (33, 61) change in pumping speed to null any deviation from commanded rate. To associate the commanded rate with actual weight of chips or fibers to be coated, the chips or fibers can be weighed continuously, and the continuously weighed number entered into the control computer (33) to generate a command number for entry into the decrementing counter (50). Change-over of filling of the two cups is effected each time a "cup empty" signal is sensed by an appropriate fill state sensor (15, 16). The respective "cup empty" signals can also be used to effect re-calculation of pump rate for each withdrawal cycle.
REFERENCES:
patent: 2951618 (1960-09-01), Aldecoa
patent: 3448967 (1969-06-01), Seanor et al.
patent: 3724720 (1973-04-01), Bullivant
patent: 3960295 (1976-06-01), Horak
patent: 4284210 (1981-08-01), Horak
patent: 4353482 (1982-10-01), Tomlinson et al.
Gebruder Lodige Maschinenbau-Gesellschaft mit beschrankter Haftu
Rolla Joseph J.
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