| 摘要 |
The article being wrapped has a sheet of wrapping material draped over it so that it hangs down on each lateral side thereof. Initially the article travels on a conveyor which supports it along a central region. Thereafter the article is transferred to two supports which form part of two endless series and which travel with the conveyor. The supports are displaced laterally towards the conveyor while travelling with it until they are located beneath the edge regions of the article. The relative levels of the conveyor and supports are then changed so that the article is transferred to the supports. The supports and/or mechanical ploughs and/or air blasts overlap the hanging portions of the wrapping material along said central region. Thereafter the article is transferred to a further conveyor which engages the central region and holds the overlapping portions in place. Alternatively, air blasts can be used for this purpose, and where plastics film is being used, the air can be heated to seal the overlapping portions together. |
