Suction roller arrangement for transporting web-form material

Advancing material of indeterminate length – With adherence or attraction of material to advancing means – By pneumatic pressure

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226190, G65H 2012

Patent

active

052321410

ABSTRACT:
A suction roller arrangement for transporting web-form material consisting of a roller body in the form of a hollow cylinder of porous sintered metal, the inner space beneath the looping angle of the web being under reduced pressure. The problem of converting the torque required to transport the web with minimal reduced pressure while, at the same time, protecting the surface of the web is solved by making the pore diameter in the middle cylindrical zone of the roller larger than in the two peripheral zones and by giving the outer cylinder surface of the roller a smooth surface finish by lathe-turning, grinding and polishing. The stator in the inner space of the rotatable roller is polygonal in shape in the region of the looping angle and has different distances from the rotor.

REFERENCES:
patent: 3172321 (1965-03-01), Schrader
patent: 3268766 (1966-08-01), Amos
patent: 3416149 (1968-12-01), Stahler
patent: 3587962 (1971-06-01), Herzhoff et al.
patent: 4142661 (1979-03-01), Nettles et al.
patent: 4207998 (1980-06-01), Schmid
patent: 4506841 (1985-03-01), Hood
patent: 4888848 (1989-12-01), Serracant-Clermant et al.
patent: 4919319 (1990-04-01), Ford et al.
IBM Technical Disclosure Bulletin, "Air Bearing for Web Lubrication", A. H. Bell, May 1966.

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