Patent ID: 7744516
Filing Date: 2010-06-29
Classification: B29C,B29K,B29L,B31B,B65D

Abstract:
1. A machine for the production of bags made of thermoplastic material starting from at least one continuous web with superimposed flaps fed continuously to a heat-sealing assembly, said heat-sealing assembly including: a hot-blade device and a contrast element set transversely on opposite sides with respect to the web, actuation means for controlling displacement of the heat-sealing assembly and mutual opening and closing between said hot-blade device and said contrast element in synchronism with advance of the web, and wherein said actuation means are pre-arranged for carrying out a pendular motion of said heat-sealing assembly; and wherein said heat-sealing assembly includes a generally vertical support oscillating about a transverse axis situated underneath the web and carrying at the top said hot-blade device and said contrast element, and said actuation means including a crank mechanism with a motor-driven shaft with an eccentric cam parallel to said transverse axis and actuating said oscillating support.