초록 ▼

Apparatus for forming a denesting lip in paperboard containers by folding, heating, and sealing or tacking a side extension flap to form a denesting lip for nested stacks of such containers. The denesting apparatus includes a pair of pressure pads which guide the paperboard container onto the appara

Apparatus for forming a denesting lip in paperboard containers by folding, heating, and sealing or tacking a side extension flap to form a denesting lip for nested stacks of such containers. The denesting apparatus includes a pair of pressure pads which guide the paperboard container onto the apparatus and prevent the container from sliding off the apparatus while the denesting operation is performed. The apparatus also includes a multiplanar mandrel pad for forming a bottom closure that is flat on its exterior surface.

대표청구항 ▼

An apparatus for forming a denesting lip in a partially formed paperboard container having open top and bottom closure portions and one side wall of the top portion of the container having a denesting extension flap, the apparatus comprising: mandrel means for mounting the partially formed container

An apparatus for forming a denesting lip in a partially formed paperboard container having open top and bottom closure portions and one side wall of the top portion of the container having a denesting extension flap, the apparatus comprising: mandrel means for mounting the partially formed container; anvil means for supporting a portion of the inside surface of the top closure portion of the container; breaker means for applying force to the outside surface of the sidewall having the denesting extension flap so as to cause the sidewall and the denesting extension flap to bend inwardly; top stop means for engaging the inside surface of the denesting extension flap when it is bent inwardly sufficiently by said breaker means so as to cause it to bend outward with respect to the sidewall as the sidewall is bent inwardly farther and for retaining the denesting extension flap in an outwardly bent position while not restraining it from being bent farther outwardly and down toward the bottom closure portion of the container; and bending means for engaging the inside surface of the denesting extension flap while it is retained in an outwardly bent position by said top stop means so as to bend it over farther until its outside surface contacts the outside surface the container in at least two spaced-apart locations such that in the spaced-apart locations the denesting extension flap and the sidewall are pressed together between said anvil means and said bending means and an outward bulge is formed in the bent-over denesting extension flap between the spaced-apart locations.