Processes for the production of an extruded web material from plastic, extruded web material and transport containers
AssigneeGebr. Scheidt GmbH
InventorMarkus Scheidt
Life of this patent
Estimating the term…
Abstract
A method for producing an extruded plastic sheeting material (12; 12′; 12″) having a multitude of parallel hollow chambers (14) in its interior, includes the steps of extrusion of a sheet of the sheeting material (12; 12′; 12″) that is continuous in the running direction (x) of the hollow chambers (14) while applying compressed air to the hollow chambers (14) from the inside, the production of weakening lines (16) in the sheet running transversely to the running direction (x) of the hollow chambers (14) by introducing creases (50) into the sheeting material (12), the depth of which is dimensioned in such a way that the hollow chambers (14) are not interrupted by the creases (50).
Claims15
A method for producing an extruded plastic sheeting material comprising a multitude of parallel hollow chambers in its interior, comprising the steps of:
- extrusion of a sheet of the sheeting material that is continuous in a running direction of the hollow chambers while applying compressed air to the hollow chambers from the inside thereof, and
- production of weakening lines in the sheet running transversely to the running direction of the hollow chambers by the step of introducing creases into the sheeting material, such that the creases have a depth that the hollow chambers are not interrupted by the creases, and a section of the hollow chamber located upstream of the crease with respect to the running direction and a section of the same hollow chamber located downstream of the crease are connected to one another at a compressed region at the location of the weakening line in such a way that the two sections communicate with one another.
An extruded plastic sheeting material comprising a multitude of parallel hollow chambers in its interior, forming a sheet that is endless in a running direction of the hollow chambers and including weakening lines in the sheet, which weakening lines run transversely to the running direction of the hollow chambers and which are formed by creases inscribed in the sheeting material, the depth of which is such that the hollow chambers are not interrupted by the creases, and a section of the hollow chamber located upstream of the crease with respect to the running direction and a section of the same hollow chamber located downstream of the crease are connected to one another at a compressed region at the location of the weakening line in such a way that the two sections communicate with one another.
Dependencies are inferred from the claim text.