Roller system for continuous transport of webs of sheeting
AssigneeBASF SE
InventorsPeter Nagel, Werner Grau, Hermann Maier, Heinrich Wittkamp, Roland Falk, Paul Willmann
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Abstract
A high-speed roller system for transporting webs of sheeting, preferably for coating the same with a magnetic layer, comprising a suction roller for control of the speed of the web, which suction roller has a surface containing grooves, preferably rhombic grooves, in which the perforations for sucking the sheeting are disposed, preferably at the points of intersection, the ratio of the total cross-sectional area of the perforations to the total surface area of the roller being from 0.7 to 3%.
Claims4
An apparatus for transporting and accelerating or decelerating webs of thin sheeting by means of a number of rollers, said apparatus comprising:
- a suction roller having a rotational axis, said roller acting as a control point and having a rhombic pattern of grooves formed on its surface, said grooves being obliquely disposed with respect to the axis of said roller
- perforations formed on said surface at the points of intersection of said grooves, and
- the ratio of total cross-sectional area of said perforations to the effective surface area of said roller being at least 0.7 to not more than 3%.
Dependencies are inferred from the claim text.