Parallelepipedic packing container and a method for its manufacture

Claim 1

A parallelepipedic packing container formed from a tube of packaging material in which the tube is filled with the desired contents and is then dividied into individual intercon-nected containers by transversely sealing the walls of the tube in face-to-face relation at spaced zones longitudinally of the tube, each zone including a pair of spaced transverse seals and an unsealed portion therebetween, shaping the individual con-tainers into a parallelepipedic form and finally separating the packages one from another by severing the transverse sealing zones between the pairs of transverse seals thereof to form sealing fins along opposed side walls of each container and triangular portions extending beyond the side walls at the top and bottom of each con-tainer, said container comprising a parallelepipedic body, sealing fins disposed along two opposite side walls thereof, each fin hav-ing a width substantially equal to one-half the width of the side walls and including one of the pair of transverse seals of each sealing zone and a fin-like portion of single thickness of the packaging material projecting from the associated transverse seal one of said fin-like portions terminating short of the opposed ends of the associated transverse seal, the other of said fin-like portions having a section of single thickness intermediate the opposed ends thereof which section corresponds in size and shape with the fin-like portion of said one of said fin-like por-tions, the ends of said other fin-like portion beyond the ends of the section of single thickness having a double thickness of packaging material, each of said fin-like portions being folded against and sealed to the associated side wall whereby the stiff-ness of the side walls of the container is increased to resist buckling when the container is handled.