Expanding mandrel
AssigneeKoenig & Bauer Aktiengesellschaft
InventorHartwig Horst Trutschel
Life of this patent
Estimating the term…
Abstract
An expanding mandrel is useable for rotatably mounting a strip of material that is wound around a sleeve or core. The expanding mandrel includes an ejecting device that is useable to strip the sleeve or core from the mandrel. The ejecting device includes at least a first part, which is rotatable about an axis together with the sleeve or core, and a non-rotatably mounted second part. The first part can strip the sleeve or core from the mandrel by actuation of the second part. That second part is a piston which can be driven by a fluid under pressure.
Claims10
A clamping mandrel adapted to rotatably support a web wound on a tube, said clamping mandrel comprising:
- an ejecting device usable to strip a tube off the mandrel;
- a first element in said ejecting device, said first element being rotatable about a central axis of rotation of the tube, said first element being adapted to strip the tube off the mandrel;
- and
- a second element in said ejecting device, said second element being adapted to engage said first element, said second element being a fluid actuated piston said piston being movable between a working position in which the tube is stripped off the mandrel, and a rest position in which said piston is separated by a gap from said first element.
A clamping mandrel adapted to rotatably support a web wound on a tube, said clamping mandrel comprising;
- an ejecting device usable to strip a tube off the mandrel;
- a first element in said ejecting device, said first element being rotatable about a central axis of rotation of the tube, said first element being adapted to strip the tube off the mandrel;
- a second element in said ejecting device, said second element being adapted to engage said first element, said second element being a fluid actuated ring-shaped piston;
- and
- a clamping cylinder, said piston being arranged coaxially in respect to said clamping cylinder of said clamping mandrel.
Dependencies are inferred from the claim text.