(57) The thickness of the elastic structure of the mattress is reduced through pressing
and feeding means cantileverly protruding, on which the open cover and the flexible
wrapper are fitted; pressing means flatten said mattress along with its cover and
its flexible wrapper, to transfer it to a winding and pressing device comprising mandrel
means, being axially sliding and rotating, and a pressing and rolling cylinder elastically
urged towards said mandrel; at least two ribbon shaped adhesive strings are placed
around the mattress being in a rolled configuration on said mandrel.
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