| 摘要 |
<p>A centrally controlled automatic device for feeding single sheets or the like in a machine for packaging signatures, newspapers or the like in a continuous film of thermoplastic material, comprising a frame, means for containing sheets stacked one on the other for feeding, means for separating at least one sheet from the bottom of the container means, means for extracting at least one sheet separated by the separation means, and means for evacuating at least one sheet once extracted, wherein the extraction means consist of a lower conveyor band on which a presser roller is caused to engage with rocking movement, the rocking movement being provided by a first cam mechanism which causes the presser roller to move from a first detached position to a second position of engagement with the lower conveyor band as soon as the separatiorn means have gripped an initial portion of the sheet and moved it from the bottom of the container means onto the lower conveyor band, there also being provided a second cam mechanism arranged coaxially to the first cam mechanism to operate the separation means, the cam mechanisms being driven by a single central drive shaft, which rotates the extraction means. <IMAGE></p> |
