B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 5/08 (2006.01) B65H 20/12 (2006.01) B65H 23/025 (2006.01) B65H 23/24 (2006.01) B65H 27/00 (2006.01)
Patent
CA 2148985
The draw roller is designed as a suction roller with a rotatable roller casing (2) having orifices (3), 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 (2) 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 (2) and is located at the start of said circumferential 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.
Lapp Joachim Alfred Heinz
Weiler Alfred Walter
de La Rue Giori S.a.
Fetherstonhaugh & Co.
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