| 摘要 |
<p>PCT No. PCT/EP96/05368 Sec. 371 Date Jun. 4, 1998 Sec. 102(e) Date Jun. 4, 1998 PCT Filed Nov. 29, 1996 PCT Pub. No. WO97/22519 PCT Pub. Date Jun. 26, 1997A machine for the formation of rolls of cotton-wool in compact form comprises a closed-loop conveyor belt having a horizontal upper branch on which there is placed a layer of cotton-wool to be wound. The machine includes a pair of support rollers for the horizontal upper branch, a first operator to execute displacement of the support rollers from a rest position with rollers reciprocally distanced to a working position with rollers reciprocally close to one another, the rollers passing through an intermediate position of partial reciprocal closeness. A support for a freely-rotatable core destined for winding up the cotton-wool and second operator that can be operated after the displacement of said support rollers in said position of partial reciprocal closeness to execute descent of the support of the core from a rest position above the upper branch of the conveyor belt to a position of partial lowering below the upper branch of the conveyor belt. The core engages and lowers a portion of the upper branch of the conveyor belt and a corresponding portion of the layer of cotton-wool passing between the support rollers so as to create a loop of the upper branch and the support rollers. A third operator driving the conveyor belt winds up the layer of cotton-wool around the core after a further displacement of the support rollers in said working position and while the descent of the core continues. Tensioners associated with the conveyor belt maintain tension of the belt at a constant value suitable for pressing the cotton-wool as the core continues to move downward and as the cotton-wool is wound on the core itself.</p> |
