Patent ID: 9725194
Date: 2017-08-08
CPC Classifications: B31B,B65B

Claim:
1. An automatic packaging machine including a folding assembly, the folding assembly comprising: a sliding plane for conveying a continuous sheet of packaging material along a conveying direction, said sliding plane comprising an entrance end for entering said continuous sheet of packaging material and two opposite sides parallel to said conveying direction; a feeding assembly for feeding said continuous sheet of packaging material along a feeding plane which is substantially orthogonal to said conveying direction; at least one block fixed to the machine at said entrance end and along at least one of the two opposite sides of said sliding plane, the at least one block having a rectilinear edge facing said feeding plane and substantially parallel to said feeding direction so as to define a longitudinal creasing element of said continuous sheet of packaging material for folding a corresponding longitudinal flap thereof; and a body associated with said at least one block, said body provided with a cone-sector surface having a vertex arranged at an outlet end of said rectilinear edge at which said continuous sheet of packaging material provided with said longitudinal creasing exits, and said cone-sector surface having a conicity converging towards said entrance end of said sliding plane, wherein said continuous sheet of packaging material is fed along said feeding plane according to a feeding direction substantially orthogonal to said sliding plane and is deviated by a substantially right angle while passing from said feeding plane to said sliding plane, and wherein said cone-sector surface supports said longitudinal flap during said longitudinal creasing and accompanies it during the folding along said longitudinal creasing.