Apparatus for the production of synthetic plastic bags

Abstract

Abstract Apparatus for the production of bags having overlapping layers of bondable synthetic plastic material has an annulus of first sealing members which are rotated by a carrier about a vertical axis and a set of second sealing members mounted on a platform which is oscillatable back and forth about the axis and moves for a certain interval at the exact speed of the first carrier while the carrier and the platform rotate in the same direction to thereby maintain each second sealing member in alignment with the adjoining first sealing member. A blank having overlapping bondable layers is advanced between the first and second sealing members at the exact speed of and in the same direction as the first sealing members, and the platform support pneumatic cylinders which press the second sealing members toward the adjacent same direction and at the speed of the carier whereby the cooperating first and second sealing members compress selected portions of the blank therebetween to provide such portions with seams. The blank is thereupon severed midway across each seam to yield a succession of discrete bags each of which is open at one or both ends, depending on the nature of the blank. The first sealing members alternate with rod-shaped guide members which engage the blank and are moveable radially of the carrier to change the length of the path for the blank. The first sealing members can be retracted away from the path for the blank th prevent charring when the apparatus is idle.

Inventors

• 👤 Hans Holler
• 👤 Josef Breidenbach
• 👤 Bergisch Gladbach
• 👤 Aloys Milles

Bibliographic Details