Method and apparatus for winding up coreless and soft-core...

Details Method and apparatus for winding up coreless and soft-core... Method and apparatus for winding up coreless and soft-core...

2005-05-18

2009-11-03

Kim, Sang (Department: 3654)

Winding, tensioning, or guiding

Tension control or brake

Take-up coil drive control

C242S413300, C242S417100, C242S419300, C242S532200

Reexamination Certificate

active

07611087

ABSTRACT:
A method and an apparatus f or winding careless and soft-core rolls (11), of film materials (10). The film (10) is made to advance, at differentiate speeds (S1, S2), between a first and a second drawing unit (12, 21) making the film (10) to perform a floating loop (19). The film (10) is fed in a controlled way, making it adhere to a grooved corrugating drum (22) by an air jet (29) to corrugate cross corrugations in the film (10) while it is being wound up; the corrugations of the film (10) traps air and prevents the implosion of the roll (11). A programmable electronic unit (32), controls the drawing units (12, 21) in relation to control signals (E1, E2) related to the feeding and winding up speeds (S1, S2) of the film (10), and in relation to a control signal supplied by a sensing device (28) for detecting the position of the floating loop (19).

REFERENCES:
patent: 4070951 (1978-01-01), Bala et al.
patent: 4277032 (1981-07-01), Alberto et al.
patent: 5003752 (1991-04-01), Matsumoto
patent: 5062582 (1991-11-01), Harmon et al.
patent: 5228635 (1993-07-01), Tanaka et al.
patent: 5611272 (1997-03-01), Steuer
patent: 6230616 (2001-05-01), Steuer
patent: 0 728 102 (1996-08-01), None
patent: 05 086216 (1993-04-01), None

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