| US 7,500,338 B2 | ||
| Method and unit for heat-shrinking overwrappings of heat-shrink plastic material of a succession of products | ||
| Mario Spatafora, Granarolo (Italy); Enrico Campagnoli, S. Agata Bolognese (Italy); and Fabrizio Tale′, Bologna (Italy) | ||
| Assigned to G.D Societa' per Azioni, Bologna (Italy) | ||
| Filed on Aug. 15, 2007, as Appl. No. 11/839,076. | ||
| Claims priority of application No. BO2006A0611 (IT), filed on Aug. 17, 2006. | ||
| Prior Publication US 2008/0053043 A1, Mar. 06, 2008 | ||
| Int. Cl. B65B 53/02 (2006.01); B65G 37/00 (2006.01) | ||
| U.S. Cl. 53—442 [53/557; 198/469.1; 198/459.2] | 7 Claims |
| 1. A method of heat-shrinking overwrappings of heat-shrink plastic material of a succession of products (2); the method comprising the steps of:
conveying, by means of conveying means, an orderly succession of products (2), each having an overwrapping of heat-shrink plastic material;
subjecting each product (2) to a first heat-shrink operation along the conveying means and by means of a first heat-shrink device (45); and
subjecting each product (2) to a second heat-shrink operation along the conveying means and by means of a second heat-shrink device (46) separate and at a distance from the first heat-shrink device (45);
wherein the conveying means comprises a first conveyor (6) connected to the first heat-shrink device (45), and which feeds the products (2) in a first direction (8), and a downstream second conveyor (10) connected to the second heat-shrink device (46), and which feeds the products (2) in a second direction (11); and
the method comprising the further steps of:
feeding the products (2) along the first conveyor (6) in a first position with respect to the first direction (8);
changing the position of the products (2) by means of a transfer device (17) interposed between the first conveyor (6) and the second conveyor (10), and which transfers the products (2) from the first conveyor (6) to the second conveyor (10); and
feeding the products (2) along the second conveyor (10) in a second position, different from the first position, with respect to the second direction (11).
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