Patent ID: 7441391

Claim:
A device for forming containers produced continuously from a tubular wrapper fed along a substantially vertical direction of advance, comprising: a plurality of support carriages movable along a respective closed path, said closed path having at least one active segment parallel to said direction of advance; each support carriage having a sealing base for being actuated on a first lateral face of said tubular wrapper and a contrasting element movable between a first closed position in which the contrasting element is approached to said base and engaged to a second lateral face of the tubular wrapper opposite to the first lateral face, and a second position in which the contrasting element is movable away from said base; means for actuating said plurality of support carriages along the path to move each carriage at a variable velocity along the active segment; and means for cutting said tubular wrapper operatively active at a sealing region to obtain said containers; wherein said means for actuating said support carriages comprise at least one supporting guide to guide the support carriages along said closed path, a first motor member to actuate the support carriages along the active segment and a second motor member to actuate the support carriages alone a passive segment opposite to said active segment.