Movable fluid dispenser with air bubble detectors for controlling dispenser movement
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United States of America Patent
Stats
-
Oct 20, 1987
Grant Date -
N/A
app pub date -
Feb 18, 1986
filing date -
Feb 18, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for dispending a fluid free of included air bubbles, such as for example, an adhesive bead, includes sensing devices for detecting the presence of an included air bubble in the conduit leading from a source of the fluid to a discharge of a movable fluid dispenser. The sensing devices are connected to a motor which drives an arm on which the fluid dispenser is mounted. A first sensing device slows movement of the dispenser upon sensing an air bubble in the fluid and a second sensing device stops movement of the dispenser upon sensing an air bubble in the fluid. The movement of the dispenser is restarted after a predetermined time period sufficient to allow the air bubble to pass out of the dispenser discharge. The sensing devices advantageously use a light beam, such as infra-red light or laser, to detect the presence of the included air bubble.
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