A sealing and cutting device for forming bags containing products includes; a sonotrode for sealing a portion of a continuous tubular strip, feeding along a feed direction; a counterhead positioned facing the sonotrode; a movement system for moving the sonotrode and/or anvil between a first non-operating position, wherein the sonotrode and the anvil are apart, and a second operating position wherein the sonotrode and the anvil are in contact to simultaneously seal a head and bottom of respective bags. A cutting element includes a circular blade connected to a supporting and movement element which imparts a translational movement to the blade with a circular shape along a direction perpendicular to the feed direction of the strip. The anvil includes a slit from which the blade 6 protrudes, for cutting the strip, by contact with the sonotrode in the second operating position, to separate a bag formed from the remaining strip.

In a packing method, the band divided into blocks each having a length necessary for one packing of a package object in a longitudinal direction is used, and a mark is provided at a predetermined position in each of the blocks so as to arrange a boundary portion between the blocks on a blade provided in a sealing unit when the mark is detected at a detection position provided on a band feeding path of the packing machine. By performing a position alignment process of retracting the band by the roller unit from a state of which the band is fed until when at least one of the boundary portions passes over the blade, and terminating the retracting when the mark is detected at the detection position, the boundary portion is arranged above the blade, thereby the band can always be accurately cut at the boundary portion.

The present invention is directed to a heat-sealing apparatus of a flow wrapper machine which facilitates efficient, reliable and versatile operation. Notably, the apparatus includes multiple ring gears driven by multiple servo motors in a desirably compact configuration, with the arrangement including quickly removable heat-sealing die heads for efficient operation and service. The improved drive mechanism facilitates more accurate heat-sealing head placement, smoother operation, controlled stops, independent temperature control, and continuous running through die jams. Also included is a four-bar link on the heat-sealing head for opening and closing the heat-sealing dies.

A sealing and cutting device for forming bags containing products includes; a sonotrode for sealing a portion of a continuous tubular strip, feeding along a feed direction; a counterhead positioned facing the sonotrode; a movement system for moving the sonotrode and/or anvil between a first non-operating position, wherein the sonotrode and the anvil are apart, and a second operating position wherein the sonotrode and the anvil are in contact to simultaneously seal a head and bottom of respective bags. A cutting element includes a circular blade connected to a supporting and movement element which imparts a translational movement to the blade with a circular shape along a direction perpendicular to the feed direction of the strip. The anvil includes a slit from which the blade protrudes, for cutting the strip, by contact with the sonotrode in the second operating position, to separate a bag formed from the remaining strip.

A sealing and cutting assembly that includes a first rotating assembly with a first axis of rotation and a first actuation tool rotating with respect to the first axis of rotation, and a second rotating assembly with a second axis of rotation and a second actuation tool rotating with respect to the second axis of rotation. The sealing and cutting assembly also includes a transmission system that includes first and second gearwheels associated with the second actuation tool, and an adjustment actuator for causing a relative rotation between the first and second gearwheels.

An apparatus for forming a weld between a first portion of a biocompatible conductive thermoplastic material and a second portion of a biocompatible conductive thermoplastic material comprises a first electrode, a second electrode, and a structure for holding said first and second electrodes in opposition to one other with a space therebetween for receiving said first portion and said second portion in contact with one another. The structure is electrically non-conductive and an electrical circuit comprising a power source and a switch arranged such that closure of said switch applies a voltage potential across said first electrode and said second electrode so as to generate heat via electrical resistance, the heat being sufficient to melt regions of said first and second portions.