Abstract: The closing of the end edges of the wrapper (5) which is wrapped around the product in a shape made tubular in a known manner, is performed by folders, some of which are dynamic (15, 15' and 17, 17' ), located in different stations, and some static (8, 8' and 18, 18'). The first pair of dynamic folders (15, 15}') is mounted on the same dynamic folder (14) that folds the first lateral edge (505) of the wrapper. A possible option is to replace the last pair of dynamic folders (17, 17') with a pair of static folders (25, 25'). Before the final rolling stage, the wrapped product passes through a shaped channel (19) that keeps the end folds of the wrapper correctly arranged. The last pair of static folders (18, 18') may be incorporated in this channel. The end edges of the wrapper may be folded in three or in four consecutive portions laid over each other.

Abstract: The levers (8, 9) supporting the lifting member (4) and the counter-lifting member (5) are associated with respective quadrilaterals (8, 12, 18, 122 and 9, 13, 19, 122) that are articulated on horizontal spindles (10, 16, 14, 20 and 11, 17, 15, 21) which are mutually parallel and orthogonal to the tangent of the peripheral portion of the disc (1) on which the lifting means operate cyclically. One side of each articulated quadrilateral is supported laterally by a box (22) which is fixed to the base of the wrapping machine, into which box passes one of the fixed spindles (14, 15) of each quadrilateral, in order to receive, via levers and cams (23, 24, 27, 28), the necessary oscillatory motion from a shaft (29) that rotates continuously and in step with the other members of the wrapping machine.