Pressure roll
AssigneeDe Pretto-Escher Wyss S.R.L.
InventorsEugen Schnyder, Guenter Machguth, Egon Gasser
Life of this patent
Estimating the term…
Abstract
A pressure roll having a fixed carrier and a rotating elastically deformable roll jacket that cooperates with a counter-roll and that is supported on the carrier via a hydrostatic support arrangement. The roll jacket has an inner surface that is movably guided in the peripheral direction over a concave support surface. The roll jacket is executed with a wall that is flexible in the radial direction and can conform to the counter-roll over a pressure zone whose width dimension in the peripheral direction is adjustable within a range of at least 8 mm to circa 40 mm. Furthermore, the roll jacket consists at least partially of an electrically conductive material in order to prevent an uncontrolled electrostatic charging of the jacket surface.
Claims15
A pressure roll comprising:
- a fixed carrier including at least one guide surface that includes a support surface;
- a roll jacket that rotates about the fixed carrier and is formed of an elastically deformable material, the roll jacket comprising:
- an electrically conductive layer, and
- an inner surface having a substantially circular cylindrical shape, wherein the roll jacket is capable of moving along the support surface and the guide surface at the inner surface;
- and
- a counter-roll that forms a pressure zone in conjunction with the roll jacket, the pressure zone having an adjustable width.
A printing machine comprising a pressure roll device, the pressure roll device comprising:
- a fixed carrier including at least one guide surface that includes a support surface;
- a roll jacket that rotates about the fixed carrier and is formed of an elastically deformable material, the roll jacket comprising:
- an electrically conductive layer, and
- an inner surface having a substantially circular cylindrical shape, wherein the roll jacket is capable of moving along the support surface and the guide surface at the inner surface;
- and
- a counter-roll that forms a pressure zone in conjunction with the roll jacket, the pressure zone having an adjustable width.
Dependencies are inferred from the claim text.