| 摘要 |
Apparatus for determining whether the movement of articles travelling on a conveyor have stalled includes a first sensor, such as a photoeye, for sensing the presence of at least one of the articles at a first location along the conveyor and second sensor, such as a photoeye, for sensing whether the articles are moving past another location along the conveyor. A control unit is provided which is responsive to the first photoeye sensing the presence of at least one article at the first location and responsive to the second photoeye detecting that articles are not moving for determining that the movement of the articles has stalled and for initiating appropriate corrective action, such as actuating alarm(s) and, in the case where the apparatus is used in conjunction with an induction sealing apparatus, terminating power to the sealing head of such apparatus.
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