B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
154/29.02, 154/7
B29C 65/08 (2006.01) A61F 13/15 (2006.01) B29C 65/00 (2006.01) B29C 65/18 (2006.01)
Patent
CA 1306932
ADHESIVE-FREE BONDING OF CONTINUOUSLY MOVING WEBS TO FORM LAMINATE WEB AND PRODUCTS CUT THEREFROM ABSTRACT Method and apparatus for ultrasonically bonding continuously moving webs to one another using a stationary vibrating horn and a relatively slick, non-thermally softenable moving slip layer interposed between the webs to be bonded and the horn to prevent web damage. Interposing the slip layer between the webs to be bonded and the ultrasonic horn improves both the quality and efficiency of web bonding. It reduces friction between the travelling webs and the substantially stationary ultrasonic horn not only due to its relatively slick surface, but also due to the compressive force which the slip layer exerts upon the webs to be bonded. This in turn minimizes jamming and hangups in the very limited clearance existing between the rotating anvil roll and the substantially stationary vibrating ultrasonic horn. In addition, the slip layer maximizes retention of heat either generated in the laminate web by the ultrasonic horn or transferred to the laminate web structure by preheating one or more of the webs. If desired, the slip layer may be comprised of a continuous belt which rotates about the ultrasonic horn. In addition, a secondary slip layer may be provided intermediate the webs to be bonded and the rotating anvil roll to minimize heat transfer from the webs to the anvil roil and to prevent sticking of the webs to the anvil roll. In a particularly preferred embodiment the peripheral edges of the raised anvil bosses are relieved slightly to minimize web tearing and to enhance bond strength. In still another preferred embodiment the anvil roll is heated to a temperature approximating the maximum temperature achieved by the webs being banished to minimize heat transfer from the webs to the anvil roll during the bonding operation. Novel laminate products bonded on-the-fly without the use of an ancillary adhesive may also be produced.
530475
Reiter Godfrey
Weber Gerald Martin
Willhite William Jr.
Reiter Godfrey
Sim & Mcburney
The Procter & Gamble Company
Weber Gerald Martin
Willhite William Jr.
LandOfFree
Adhesive-free bonding of continuously moving webs to form... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adhesive-free bonding of continuously moving webs to form..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adhesive-free bonding of continuously moving webs to form... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1188312