Advancing material of indeterminate length – With adherence or attraction of material to advancing means – By pneumatic pressure
Patent
1975-09-12
1977-06-14
Saifer, Robert W.
Advancing material of indeterminate length
With adherence or attraction of material to advancing means
By pneumatic pressure
226193, 291212, B65H 1730
Patent
active
040292495
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%.
REFERENCES:
patent: 1603763 (1926-10-01), Griffin
patent: 3122295 (1964-02-01), Davison et al.
patent: 3630424 (1971-12-01), Rau
patent: 3821076 (1974-06-01), Stenberg et al.
Falk Roland
Grau Werner
Maier Hermann
Nagel Peter
Willmann Paul
BASF - Aktiengesellschaft
Saifer Robert W.
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