Perforated roll for guiding a flexible material web

Details Perforated roll for guiding a flexible material web Perforated roll for guiding a flexible material web

1997-11-20

1999-06-29

Jillions, John M.

Winding, tensioning, or guiding

Material guide or guard

Angled turning guide for a web

226 95, 162368, 492 12, 492 20, B65H 2700, B65H 2012

Patent

active

059156481

ABSTRACT:
A drum for guiding a material web, in particular a paper web. The drum has a jacket and a hollow interior. A respective cover at each end of the jacket. A respective bearing journal at each cover for supporting the roll to rotate. The jacket has a plurality of passage openings for passage of air therethrough. At least one and perhaps two impellers inside the interior of the drum, each having a suction side for drawing air into the drum through the passage openings. A pressure side at the other side of the impeller. Air exits the drum from the pressure side of the impeller through passage openings and/or an opening in a cover.

REFERENCES:
patent: 1661646 (1928-03-01), Wilhelm
patent: 2714840 (1955-08-01), Bayrer et al.
patent: 3549098 (1970-12-01), Helkala
patent: 3915407 (1975-10-01), Zaydowicz et al.
patent: 4611638 (1986-09-01), Matumura
patent: 5456802 (1995-10-01), Worcester
JP 2-8139 a., In Patents Abstracts of Japan, M-950, Mar. 16, 1990, vol. 14, No. 140.

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