Winding – tensioning – or guiding – Convolute winding of material – With cutting – perforating – or notching
Patent
1994-06-15
1996-04-09
Darling, John P.
Winding, tensioning, or guiding
Convolute winding of material
With cutting, perforating, or notching
2425414, B65H 1826
Patent
active
055054030
ABSTRACT:
A drum winder and method for winding a web in a drum winder, in which winding drums support a roll that is being formed and a cutter device cuts the web before a new winding is started on an empty roll spool. The cutter device has a cutter blade, an actuator, and a power transmission system operatively coupled to the cutter blade of the cutter device so that the movement of the actuator is transferable by the power transmission arrangement to the cutter blade. The cutter blade is movable along a curved path of movement so that the position of the cutter blade in its lower position is substantially more distant from one of the winding drums than it is in its upper position. On the blade beam of the cutter blade, seal units are arranged to seal the winding drums from below. The gap between the winding drums is sealed from above by an upper end-seal unit, whereby the gap between the winding drums can be pressurized. On the blade beam of the cutter blade, a sealing doctor blade may be arranged. The blade beam is provided with an end seal.
REFERENCES:
patent: 3346209 (1967-10-01), Cronin
patent: 3497151 (1970-02-01), Voss et al.
patent: 3515183 (1970-06-01), Voss
Darling John P.
Valmet Paper Machinery Inc.
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