| 摘要 |
A support device for a pressure roller, forming a lateral retainer and associated with the upper working head of a packaging machine, comprises a plate, essentially in the form of a circular sector, from which a support arm for the roller projects, the plate being mounted rotatable on a vertical pivot fixed to the machine working head assembly and cooperating with a position lock, the roller being carried at the end of said support arm by a vertical rotation pin.
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