Device for separating a tubular web
AssigneeWindmoller & Holscher
InventorWerner Beckonert
Life of this patent
Estimating the term…
Abstract
The invention relates to a Device (10) for separating a tubular web (11) in two flat webs (12, 13) with an adjustable blade (20) for cutting the tubular web (11) and with a pulling device (30) which impinges the blade (20) with a tensile force (K) on a folding edge (14) of the tubular web (11) wherein the pulling device (30) is configured in a way that the tensile force (K) is adjustable depending on the tubular properties of the tubular web (11) and that the tensile force (K) can be mainly kept constant with constant tubular properties independent from the tubular web (11).
Claims7
A device for cutting a tubular web comprising:
- an adjustable blade for cutting the tubular web;
- and
- a pulling device, comprising:
- a pneumatic cylinder, which pulls the blade to impinge a tensile force on a folding edge of the tubular web,
- a transmission mechanism,
- a first drag rope mechanically connecting a piston rod of said pneumatic cylinder to said transmission mechanism, and
- a second drag rope mechanically connecting said transmission mechanism to the blade;
- wherein the tensile force is automatically adjusted by the pneumatic cylinder by a movement of said adjustable blade caused by a change of a tubular width of the tubular web, wherein said movement is propagated to said piston rod through said second drag rope, said transmission mechanism and said first drag rope.
A device for cutting a tubular web comprising:
- an adjustable blade for cutting the tubular web;
- a pulling device, comprising:
- a pneumatic cylinder and a pressure regulator which regulates a pressure in the pneumatic cylinder, said pulling device pulls the blade to impinge a tensile force on a folding edge of the tubular web,
- a transmission mechanism,
- a first drag rope mechanically connecting a piston rod of said pneumatic cylinder to said transmission mechanism, and
- a second drag rope mechanically connecting said transmission mechanism to the blade;
- and
- at least one sensor which monitors a tubular width of the tubular web and is operatively connected to the pneumatic cylinder;
- wherein the tensile force is automatically adjusted by the pneumatic cylinder by a movement of said adjustable blade caused by a change of the tubular width of the tubular web, wherein said movement is propagated to said piston rod through said second drag rope, said transmission mechanism and said first drag rope.
Dependencies are inferred from the claim text.