Roll or roller – Rotatable relative to supporting shaft – Paper treatment
Patent
1995-05-02
1997-07-22
Cuda, Irene
Roll or roller
Rotatable relative to supporting shaft
Paper treatment
492 18, 492 33, 492 36, B23P 1500
Patent
active
056498900
ABSTRACT:
The draw roller is designed as a suction roller with a rotatable roller casing having orifices, and the material web loops around the draw roller along a circumferential portion. The internal suction-air supply connectable to a negative-pressure source opens out on the inner circumference of the roller casing and is designed so that a stationary suction surface of wedge-shaped form is obtained on the casing circumference. The wedge tip is directed opposite to the direction of rotation of the roller casing and is located at the start of said circumference portion in the roller center. The suction surface widens obliquely outwards on both sides with an increasing looping angle and, at the end of the circumferential portion, has a width corresponding to the total width of the material web.
REFERENCES:
patent: 1175940 (1916-03-01), Farnsworth et al.
patent: 1627966 (1927-05-01), Goodlett
patent: 2900024 (1959-08-01), Holcroft
patent: 3273492 (1966-09-01), Justus
patent: 3942735 (1976-03-01), Marchio et al.
patent: 4073679 (1978-02-01), Schiel
patent: 4559106 (1985-12-01), Skytta492 30
Lapp Joachim Alfred
Weiler Alfred Walter
Cuda Irene
De la Rue Giori S.A.
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