US 5,823,463 AGranted

Wound roll support in a web winding machine

AssigneeVoith Sulzer Papiermaschinen GmbH

InventorsHans-Joachim Fissmann, Matthias Wohlfahrt

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Abstract

A winding machine for a continuous web includes at least two support rollers defining a bed for the wound web. At least one roller has a rotatable, perforated roller shell. A stationary pressure box disposed inside the roller shell which is opened toward the inner surface of the perforated shell and is connectable to a source of pressure air. A further longitudinally extending packing closes the bottom of the gap between the first and second rollers. Longitudinal packings at the pressure box define a pressure zone extending approximately from the further packing to the place where the round roll lies on the one support roller. A suction zone is defined at the support roller upstream in the direction of roll shell rotation from the pressure zone. A grid of walls along the pressure zone in the pressure box define axially shorter length individually pressurizable zones connectable to a pressure source. In an alternate embodiment, three support rollers define two roll beds. The first and third of the rollers are support rollers as described above.

Claims24

Dependent claims

A machine for winding or unwinding a web roll of material having a width and a weight, the winding machine comprising:

at least first and second support rollers, each having a peripheral surface along its width, the support rollers being disposed proximate to one another such that the peripheral surfaces rollably support the web roll;
a rotatable and perforated roller shell forming the peripheral surface of the first support roller and having an inner surface defining an interior, the shell being rotatable about a stationary axis;
a gas pressure box being connectable to a source of pressurized gas and located in the interior of the perforated roller shell of the first support roller, the pressure box having an outer surface which includes an opening for permitting the pressurized gas to pass;
a first packing element having an exterior surface in slidable communication with the peripheral surfaces of the support rollers and extending along their widths;
the exterior surface of the first packing element, the peripheral surfaces of the rollers and an area of the web roll between the peripheral surfaces of the rollers defining a volume substantially beneath the web roll;
and
circumferentially spaced apart second and third packing elements extending longitudinally along the pressure box between the outer surface of the pressure box and the inner surface of the perforated roller shell for defining a pressure zone between the second and third packing elements;
the opening in the pressure box communicating with the pressure zone and the pressure zone communicating with the volume through the perforations in the roller shell such that gas pressure is increased in the volume which counteracts the weight of the web roll.

5 more elements

A machine for winding or unwinding a web roll of material having a width and a weight, the winding machine comprising:

at least first and second support rollers, each having a peripheral surface along its width, the support rollers being disposed proximate to one another such that the peripheral surfaces rollably support the web roll;
a rotatable and perforated roller shell forming the peripheral surface of the first support roller and having an inner surface defining an interior, the shell being rotatable about a stationary axis;
a gas pressure box being connectable to a source of pressurized gas and located in the interior of the perforated roller shell of the first support roller, the pressure box having an outer surface which includes an opening for permitting the pressurized gas to pass;
a first packing element having an exterior surface in slidable communication with the peripheral surfaces of the support rollers and extending along their widths;
means for defining longitudinally positioned pressure zones disposed within the first support roller along respective longitudinal parts of the support roller;
means for adjusting lengths of the longitudinally positioned pressure zones and for adjusting the quantity of the pressure zones, the means for adjusting being located within the first support roller;
the exterior surface of the first packing element, the peripheral surfaces of the rollers and an area of the web roll between the peripheral surfaces of the rollers defining a volume substantially beneath the web roll;
and
circumferentially spaced apart second and third packing elements extending longitudinally along the pressure box between the outer surface of the pressure box and the inner surface of the perforated roller shell for defining a pressure zone between the second and third packing elements;
the opening in the pressure box communicating with the pressure zone and the pressure zone communicating with the volume through the perforations in the roller shell such that gas pressure is increased in the volume which counteracts the weight of the web roll.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/804,814Filed 24 Feb 1997
Priority: DE 196 06 755.323 Feb 1996
Granted: 20 Oct 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B65H 18/26
Web-winding mechanisms: mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers
B65H 18/20
Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web: the web roll being supported on two parallel…
B65H 2301/414866
Winding on two or more winding shafts simultaneously: on bed rollers
B65H 2403/942
Other features of machine drive: bidirectional powered handling device