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US 5,308,008 AGranted
Method and apparatus for producing rolls
OwnerAnton Ruegginventor
Life of this patent
Estimating the term…
Abstract
A process and apparatus for the winding-up of material webs on winding cores is provided. A material web is fed via a winding drum to a winding core or roll. The winding drum is displaceable, while the roll is blocked against displacement during winding. An adjusting device keeps the winding drum under constant pressure against the roll or with a constant clearance from it. With the roll diameter growing, the winding drum is o displaced against the force of the adjusting device into a limit position. On reaching the limit position, the blocking of the roll is released and the adjusting device pushes the winding drum into another limit position, whereupon the roll is again blocked. This sequence of movements is repeated until the roll is finished.
Claims13
A method for producing rolls from flexible sheet material, said material being fed in continuously via a rotatably mounted winding drum, said method comprising:
- bearing said material against a part of a circumference of said winding drum;
- winding said material consecutively on one of a plurality of winding cores, said winding cores being fed in one after the other at a time interval;
- driving and rotating said one winding core, about an axis parallel to an axis of rotation of said winding drum during a winding operation;
- moving said winding drum against an adjusting force from a forward limit position to a rearward limit position, essentially perpendicularly to said axis of rotation in accordance with an increase in radius of a roll being produced;
- preventing displacement of said roll in a perpendicular direction with respect to the rotation axis of said roll during said movement of said winding drum from said forward to said rearward limit position;
- maintaining said roll and said winding drum under one of mutual, essentially constant contact pressure and essentially constant clearance during said moving of said winding drum;
- releasing said roll to enable displacement in a perpendicular direction with respect to the rotation axis of said roll when said winding drum reaches said rearward limit position;
- after release of said roll, moving said winding drum under the adjusting force to said forward limit position;
- synchronously with moving said winding drum to said forward limit position, moving said roll such that one of the contact pressure and clearance remains constant;
- and
- after arrival of said winding drum at said forward limit position, repeating the movement of said winding drum between said forward and rearward limit positions until said roll reaches a predetermined size, wherein displacement of the roll is blocked in a perpendicular direction with respect to said rotation axis during each movement of said winding drum from said forward to said rearward limit position and displacement of the roll is allowed during each movement of said winding drum from said rearward to said forward limit position.
8 more elements
An apparatus of producing rolls from flexible sheet material, said apparatus comprising:
- feeding means for continuously feeding flexible sheet material;
- a bearing device rotatably receiving a winding drum, said winding drum having a circumference, a part of said circumference having said sheet material adapted to bear thereagainst, said bearing device being movable in a direction essentially perpendicular to a rotational axis of said winding drum between a forward limit position and rearward limit position;
- biasing means acting upon said bearing device for urging said bearing device towards said forward limit position;
- a winding core bearing for rotatably carrying a winding core during a winding operation, said winding core having a rotational axis which is parallel to the rotational axis of said winding drum during said winding operation, said winding core bearing being mounted for displacement together with said winding core in a perpendicular direction with respect to the rotational axis of said winding core;
- a releasable blocking means for temporarily blocking said winding core bearing against displacement during the movement of said bearing device form the forward to the rearward limit position, whereby said bearing device together with said winding drum is moved form said forward to said rearward limit position against the action of said biasing means in accordance with the increase in radius of the roll being produced on said winding core while said blocking means blocks said winding core bearing against displacement;
- a control and adjusting means including said biasing means for controlling the movement of said bearing device, said control and adjusting means further comprising:
- detector means for detecting when said bearing device reaches said forward and rearward limit positions;
- and
- control means which causes said blocking means to cease blocking winding core bearing displacement when said detector means detects arrival of said bearing device at said rearward limit position and thus allowing said bearing device to move to said forward limit position and said roll to simultaneously move such that one of the contact pressure and clearance between said winding drum and said roll remains constant, said control means causing said blocking means to again block winding core displacement upon arrival of said bearing device at said forward limit position.
6 more elements
Dependencies are inferred from the claim text.