| US 7,585,444 B2 | ||
| Method for reducing camber in coiled plastic ribbon or tape | ||
| Carroll F. Baranowske, III, Tomkins Cove, N.Y. (US); Rusty Koenigkramer, Nanuet, N.Y. (US); and Hugh K. Schedler, Park Ridge, N.J. (US); Carolyn Cannan, legal representative | ||
| Assigned to Illinois Tool Works Inc., Glenview, Ill. (US) | ||
| Filed on Jun. 14, 2005, as Appl. No. 11/152,271. | ||
| Prior Publication US 2006/0279016 A1, Dec. 14, 2006 | ||
| Int. Cl. B29C 47/00 (2006.01); B65H 18/00 (2006.01) | ||
| U.S. Cl. 264—177.17 [264/281; 242/471; 242/477.1] | 19 Claims |
| 14. A method of winding a length of plastic ribbon around a cylinder of a spool having a first flange at one end and a second
flange at the other end, comprising the following steps:
(a) attaching an end of the ribbon to the spool so that a portion of the ribbon is disposed at a starting position on the
cylinder;
(b) rotating the spool with the end of the ribbon attached thereto;
(c) while the spool is rotating, continuously displacing one of the incoming portion of the ribbon and the spool relative
to the other so that the most recently wound portion of the ribbon moves relative to the spool from the starting position
toward the first flange, such displacement continuing until the most recently wound portion of the ribbon is located adjacent
or near the first flange;
(d) following step (c) and while the spool is rotating, continuously displacing one of the incoming portion of the ribbon
and the spool relative to the other so that the most recently wound portion of the ribbon moves relative to the spool from
the first flange toward the second flange, such displacement continuing until the most recently wound portion of the ribbon
is located adjacent or near the second flange;
(e) following step (d) and while the spool is rotating, continuously displacing one of the incoming portion of the ribbon
and the spool relative to the other so that the most recently wound portion of the ribbon moves relative to the spool from
the second flange toward the first flange, such displacement continuing until the most recently wound portion of the ribbon
is located adjacent or near the first flange,
wherein steps (d) and (e) are repeated in alternating sequence during winding, and further comprising the following steps:
whenever the most recently wound portion of the ribbon is within a central region and not within a predetermined distance
of either of the first and second flanges during steps (c), (d) and (e), maintaining the tension in the incoming portion of
the ribbon within a first range; and
whenever the most recently wound portion of the ribbon is within the predetermined distance of either of the first and second
flanges during steps (c), (d) and (e), maintaining the tension in the incoming portion of the ribbon within a second range,
the upper limit of said second tension range being less than the lower limit of said first tension range.
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