Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Sorting bottles – ampoules – jars – drinking vessels – or like...
Patent
1978-10-19
1980-06-24
Knowles, Allen N.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Sorting bottles, ampoules, jars, drinking vessels, or like...
209598, B07C 500
Patent
active
042093872
ABSTRACT:
Method and apparatus for detecting bulged and sunken sidewalls and incorrect widths on paneled containers.
Containers to be inspected are moved along a conveyor. Two groups of three LVDT's (generally opposite from one another) are utilized to measure the distance between each of three points on the container sidewall and a reference line. The measurements are fed to a circuit which determines the deviation of one of the three points from a line passing through the remaining two points. The amount of deviation is utilized to determine whether or not the sidewall is bulged or sunken. Measurements from each pair of opposing LVDT's are fed to a circuit which determines the width of the container at three different heights. The width values are compared to predetermined limits in order to determine if the container width is acceptable.
The timing of measurements is controlled by the use of photocell sensors, which detect the passage of a container past particular reference points. The positions of the sensors are adjustable in order to permit different types or sizes of containers to be inspected. In addition, a sensor can be employed to permit accurate width measurements to be made on container with bowed panels.
REFERENCES:
patent: 2881918 (1959-04-01), Cunha
patent: 3018889 (1962-01-01), Fouse
patent: 3032192 (1962-05-01), Uhlig
patent: 3327848 (1967-06-01), Barnhart et al.
Click Myron E.
Innis D. T.
Knowles Allen N.
Owens--Illinois, Inc.
Wilson David H.
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