Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Of varying cross-sectional area or with intermittent...
Patent
1977-03-07
1978-05-09
Lowe, James B.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Of varying cross-sectional area or with intermittent...
264188, 264343, B29D 726, B29D 702, B29D 720, B29C 2500
Patent
active
040887286
ABSTRACT:
Improved roll formation in regenerated cellulose film is obtained by a method for introducing randomized gauge variations in the film on the casting machine by varying the water content in the gel film in scattered areas across the film prior to drying. Those areas of the film containing more moisture before drying tend to be thicker than those areas containing less moisture resulting in gauge variations throughout the film. Since the gauge variations are randomly imparted to the film across its width, they do not pile up on top of one another to form gauge bands when the film is wound into rolls and the effect on roll formation of any gauge bands inherently present in the film from the casting operation are minimized due to the (superimposed) randomly imparted gauge variations. Preferably, the method comprises imparting the random gauge variations in the film by producing diagonal tracks of water on the film with a transversely moving squeegee band containing a plurality of slight indentations. The squeegee is positioned between the last bath on the casting machine and the dryer and moves transversely across the film. Any one indentation in its surface contacting the film leaves a small track of water extending diagonally across the film resulting in more moisture in that area of the film before drying and an increased thickness in that area after the film is dried.
REFERENCES:
patent: 2036377 (1936-04-01), Wells
patent: 2770015 (1956-11-01), Rosser et al.
patent: 2921345 (1960-01-01), Bennes
patent: 3056164 (1962-10-01), Reichel et al.
patent: 3515780 (1970-06-01), O'Connell et al.
Habel Robert W.
Lowe James B.
Olin Corporation
LandOfFree
Method for imparting gauge variations to improve roll formation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for imparting gauge variations to improve roll formation , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for imparting gauge variations to improve roll formation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2357601