Device for transverse cutting of a web material and machine containing said device
AssigneeFosber S.p.A.
InventorsMauro Adami, Raffaele Tomelleri
Life of this patent
Estimating the term…
Abstract
The device includes a hollow cutting roller with a blade attached to the outer surface of the hollow roller. A stationary shaft is also provided, arranged inside the hollow roller and coaxial therewith. The stationary shaft is connected to a supporting structure and the hollow roller is rotatably supported onto the stationary shaft. A motor drive is provided to rotate the hollow roller around the stationary shaft. The hollow roller is supported onto the stationary shaft by at least a hydrostatic bearing arranged in an intermediate position between the ends of the stationary shaft.
Claims28
A device for transverse cutting of a continuous web material, comprising:
- a hollow roller with an inner surface, an outer surface and a rotation axis;
- a blade attached to the outer surface of the hollow roller;
- a stationary shaft with an outer surface, wherein the stationary shaft is arranged inside the hollow roller and is coaxial therewith,
- the stationary shaft having a first end and a second end, the stationary shaft being connected to a supporting structure, the hollow roller rotatably supported on the stationary shaft;
- a motor drive to rotate the hollow roller around the stationary shaft;
- at least one hydrostatic bearing comprising one or more recesses in the outer surface of the stationary shaft or in the inner surface of the hollow roller, and arranged in an intermediate position between the first end and the second end of the stationary shaft.
Dependencies are inferred from the claim text.