Method and apparatus for sealing and cutting of foil tubes
AssigneeD.R. Joseph, Inc.
InventorsUlrich Büttel, Gerritt A. B., Frank Berrenbaum
Life of this patent
Estimating the term…
Abstract
A procedure and device for longitudinal sealing and cutting of a film web, in particular a foil tube, in which the film web shows at least two layers of film, made of thermoplastic synthetic material, and in which the film web is sealed and cut in a continuous process by leading it through the device, in which the film first contacts the heating element in order to seal the two film layers by welding, in order to cut this sealed seam in the middle of the seam by guiding the film web over the cutting element, which dividends the sealed seam into at least two partial film tubes.
Claims14
A device for cutting and sealing a film web, the film web having at least two layers, the device comprising:
- a cylindrical roller that rotates in a first circumferential direction about an axis, the roller having a surface, and further having a circumferential opening in the surface;
- an arcuate sealing/cutting element within the roller opening and projecting above the roller surface, whereby the sealing/cutting element contacts a film web being carried by the roller, wherein the sealing/cutting element is heated, wherein the sealing/cutting element lies in a plane perpendicular to the roller axis and remains fixed in position when the roller rotates, wherein the sealing/cutting element projects radially beyond the surface of the roller, and wherein the sealing/cutting element has at least a first radius that projects a first distance beyond the roller surface for a first portion of the element, and at least a second radius, greater than the first radius, that projects a second distance beyond the roller surface for a second portion of the element.
Dependencies are inferred from the claim text.