Patent ID: 7445589
Filing Date: 2008-11-04
Classification: B31B

Abstract:
1. A mold for forming cardboard boxes for permitting assembly of cardboard boxes which are provided with longitudinal extensions on their sides for forming upper horizontal bridges on said sides, the longitudinal extensions or bridges being prolonged on their ends having flaps which are folded and attached onto an outer face of corresponding front ends, said front ends in turn being prolonged on extensions which by folding are attached onto an inner face and being fixed on the sides, the mold having: a structure including two frames able to be displaced towards and away from each other; a plurality of pieces mounted on respective supports for folding sectors forming the front ends and sides of the box towards a vertical position; said mold essentially comprising: a plurality of circular runners associated with corresponding adjusting means for permitting to alter height of said runners, said runners folding the extensions corresponding to the ends of the box when the box is assembled; sliding wedges in ramp along which the flaps of the extensions slide so as to fold the flaps, the folding being continued by means of a plurality of presses with inclined portions for final folding of said flaps, said flaps when being folded passing above the circular runners after a gradual descent of the box inside the mold and a mechanical motion system having a deformable parallelogram mechanism to move said presses in two directional movements, one movement being an advance towards the box and the other movement being one of descent wherein said presses are moved into contact with the flaps to press the flaps onto the front ends and the front ends are in turn tensed.