Abstract: The invention relates to a device for sealing the folded over and overlapped end flaps (L1, L2) of the plastics material wrapper for packages (P), particularly for packages of cigaerettes. In this device, the packages (P) to be sealed are passed after each other between the heated sealer bodies (7) of at least a stationary pair of opposite sealer bodies (7--7) the active faces of which engage, in their operative position, the respective ends of the packages (P) with the intermediary of the parallel facing stretches (102) of two endless belts running in the same direction and at the same speed as the packages. According to the invention, the active surface of each sealer body (7) of at least one pair of opposite sealer bodies (7--7) comprises at least two slightly protruding i.e. in-relief zones (8,9; 18,19,20; 108,208,308,109,209,309; 118,119,120,218,219,220) staggered from each other both in the direction (F) of movement of the packages (P) and transversely to said direction.

Abstract: A drive shaft (1) rotatably journalled in a stationary block (2) has keyed thereto a driving member (5), while a driven member (6) is rotatably mounted on the shaft. The driving member imparts to the shaft a positive intermittent rotation, for example by steps of one revolution or an integer fraction of one revolution. Co-axially mounted on the shaft is a disc (8) having a periphery with at least one keyway (108) if the intermittent rotation of the shaft is by one-revolution steps. The keyway-recessed disc cooperates with a latch (9) which is slidably but not rotatably mounted on the driven member and which is parallel to the axis of the shaft. The latch has a pronged end (109) which, in the dwell position of the intermittent motion of the shaft, is aligned with the head (110) of a rod (10) that is slidably mounted in the stationary block parallel to the shaft and that is driven by a pneumatic cylinder (12).