Advancing material of indeterminate length – Threading device
Patent
1993-06-03
1994-12-13
Stodola, Daniel P.
Advancing material of indeterminate length
Threading device
101228, 226 97, B41F 1354
Patent
active
053722906
ABSTRACT:
An apparatus for removing a running torn web of material is disclosed having two rollers parallel to each another disposed on a same side of the running web of material, so that the axes of the two rollers are orientated horizontal to each other and perpendicular to the direction of movement of the running web of material. The apparatus is provided with a manifold disposed on the side of the web opposite to the two rollers and provided with blowing nozzles placed in line with an inlet region formed by the two rollers in rotation. The manifold is supplied with compressed air when a detection system has detected the tearing of the web. The compressed air exits the blowing nozzles exerting a blowing force on the torn web of material causing it to engage between the two parallel rollers in rotation. A variable speed motor is provided to drive the two rollers in rotation in opposite directions while their circumferential surfaces are in mutual rotational engagement, so that the two rollers have a surface speed approximately equal to the speed of the running web of material.
REFERENCES:
patent: 3743153 (1973-07-01), Moss
patent: 4549485 (1985-10-01), Nawrath
patent: 4754702 (1988-07-01), Muller
patent: 5163371 (1992-11-01), Kotterer et al.
Nguyen John Q.
Stodola Daniel P.
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