Method and apparatus for controlling a capsule filling machine
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United States of America Patent
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Mar 14, 1989
Grant Date -
N/A
app pub date -
May 31, 1988
filing date -
Jun 11, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A metering operation in a capsule filling machine is controlled based on a correction signal derived from capsules just filled with material and ejected therefrom, by sampling/weighing these capsules, and by processing the weighed value to generate correction signal wherein: a first step of sampling/weighing is performed at the start-up stage of the capsule filling machine by collectively weighing a plurality of capsules sampled in bulk at once, and the second step of sampling/weighing is performed in subsequent steady operation stage by individual weighing each capsule from the bulk one by one. An apparatus for performing the method has a sampling chute bifurcated in alternatively switchable two paths; i.e., a direct path and a controlled path, which share a common terminal i.e., a scale pan of a balance. The first step of sampling/weighing is performed in the direct path to the pan and then said second one is made through the controlled path having a gate means which permits intermittent and individual passage of capsules.
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