| 摘要 |
Groups of products are wrapped in heat-shrinkable film by equipment comprising a first surface along which products advance in a conveying direction, and a second surface on which the products are ordered into groups and wrapped in a sheet of film cut to a length suitable for the size of the group of products being wrapped and supplied by a feed unit positioned beneath and in close proximity to a slot separating the first surface from the second surface. The feed unit operates in conjunction with a wrapping unit incorporating at least one cross rail that serves to carry and guide the sheet of film, cantilevered from a single power driven arm located close to one side of the second surface, and an adjustment mechanism governing the position of the arm, such as will enable the rail to orbit through a first active trajectory above the second surface and a second return trajectory below the second surface, describing a curved path of which the distance from the second surface is variable and selectable according to the dimensions of the groups of products being wrapped.
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