| 摘要 |
A machine for packing small-sized products inside flat-bottomed bags comprises a pair of heat sealing pincers (11, 12) fitted with a cutting blade (18) and that can be commanded to carry out a substantially D path in which, starting from a raised and shifted position, the pincers (11, 12) are transversally brought closer and engaged together to execute parallel horizontal lines of heat sealing of opposite flaps of a tubular wrapping (2) commanded to descend vertically. The pincers (11, 12) are then moved vertically, while still in a near and mutually engaged position, for a section of the descent path of said tubular wrapping (2) to carry out a double transversal sealing and an intermediate cutting of the tubular wrapping (2). Finally the pincers (11, 12) are brought back to said raised and shifted position. In order to enable flat-bottomed bags to be produced the machine also comprises two pairs of lances (37, 38) which, moving towards each other in a direction perpendicular to said descent path of the tubular wrapping (2) and to the path bringing the heat sealing pincers (11, 12) closer to each other in synchronism with the movement of said heat sealing pincers (11, 12), cause the formation of side pockets inside said wrapping (2) just above and below said sealing lines. |
