| 摘要 |
The present invention maintains optimum line pressure in a conveyor system under varying operating conditions by adjusting the speed at which package cartons are delivered to downstream devices. For example, when the speed of the downstream device is reduced, the gap between the package cartons is maintained by reducing the speed of a first upstream belt so as maintain the desired gap distance between package cartons. Once the downstream device increases its speed again, the sensing mechanism will detect that the line pressure is dropping and will simultaneously increase the speed of the first belt so that the programmed gap is maintained and the line pressure is likewise maintained at an optimum level.
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