Abstract: Apparatus for selecting and feeding web material (F1, F2, F3) from a plurality of supply bobbins (B1, B2, B3) of web material having different characteristics, comprising a selecting and dispensing device arranged on a slide (7) horizontally movable to and fro with respect to a feeder conveyor (T) which finally feeds the film to the packaging station (P) of the packaging machine. On the slide is mounted an indexing arrangement (13, 18) adapted to selectively bring into operative alignment with the feeding conveyor (T) one draw-and-guide unit (A1, A2, A3) which draws the selected film and delivers it to the feeding conveyor (T). The operative engagement between the draw-and-guide units (A1, A2, A3) is obtained by opening the feeding conveyor (T) which consist of a superposed belts conveyor (101, 201) and pinch rollers (R1, R2) and inserting therebetween the forward portion (118, 218, 318) of the draw-and-guide unit.
Abstract: The machine for the wrapping of articles in stretchable film of soft plastic material comprises a platform presenting a horizontal flat surface, onto which the article to be wrapped is positioned. The said platform is moved along a quadrangular path, effecting sequentially a lower horizontal run, during which it becomes loaded with the article, a upwardly directed vertical run, which brings the article in contact with the wrapping film and during which the proper wrapping cycle is started, a horizontal upper run, during which the wrapping operation is completed and the article is transferred away from the platform, and a downwardly directed vertical run, which brings again the platform to its loading position.