Abstract: Packing box (2) of polygonal general shape that widens out, is made from a flat cellular plastic blank that is cut and folded. The box (2) comprises a base (4) and side walls (5, 6) which are formed from side panels of the blank and are joined together, and an outer reinforcing frame (7), used for holding the box. The frame runs around the side walls (5, 6) and comprises frame members (8, 9) joined together and fixed to the side walls (5, 6). The frame members are formed from at least four flaps extending from side panels of the blank and rolled up spiral-fashion.

Abstract: Synthetic resin panel consisting of a core layer (1) of polycarbonate resin covered on at least one of its outer sides by a storage layer (2) containing between 5 and 15% by weight of an UV absorber, and on that side of said storage layer facing away from said core layer, by a cover layer (3) of synthetic resin containing an UV absorber, wherein said UV absorber, incorporated in said cover layer (3), different from said UV absorber incorporated in said storage layer (2), is of low volatility and is present at a concentration exceeding 2% by weight.

Abstract: Device for applying a protective film to a board consisting of two flat cover panels (2 and 3), coupled by partitions (4) integral with the panels, forming longitudinal cavities (5) comprising means for depositing a film of flexible material (7) on a first surface according to the longest dimensions of the board, so as to form a fold (71) at least over one of the ends onto which the cavities (5) open so as to cover the cavities with the fold.