B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 39/02 (2006.01) B29C 65/00 (2006.01) B29C 65/08 (2006.01) B29C 65/56 (2006.01) B65D 47/06 (2006.01)
Patent
CA 2127993
A two piece plastic nozzle (1) and overlying screw cap closure assembly in combination with a plastic pail cover (15) wherein the nozzle has a cylindrical body portion (5) which is inserted into a cover opening to form a friction fit therewith. The overlying screw cap is then rigidly supported as a sonic welding horn (34) is brought into axial engagement with the protruding nozzle body portion. Energization of the sonic welding horn causes the nozzle body portion to soften and deform radially outwardly into a circumferentially enlarged rivet connection. Continued axial displacement of the sonic welding horn creates a plastic bond about the periphery of the rivet connection so as to close off any leakage path therearound. At the same time any radial dispersion of plastic material resulting from the bonding process is locally contained about the rivet connection periphery.
Cette invention concerne une fermeture composée d'une buse en plastique deux pièces (1) sous capuchon à visser à monter sur un couvercle en plastique (15), ladite buse ayant un corps cylindrique (5) inséré en ajustement serré dans une ouverture du couvercle. Le capuchon à visser est alors soutenu de façon rigide pendant qu'un dispositif de soudage aux ultrasons (34) est abaissé sur la partie saillante de la buse susmentionnée. Mis sous tension, le dispositif de soudage aux ultrasons ramollit et déforme le corps de la buse en le repoussant vers l'extérieur de manière à réaliser un assemblage serti. Poussé plus loin, le dispositif de soudage aux ultrasons crée une liaison plastique à la périphérie du serti pour empêcher toute fuite. En même temps, toute dispersion radiale de matériau plastique en cours d'assemblage est confinée en périphérie de serti.
Fetherstonhaugh & Co.
Royal Packaging Industries Van Leer B.v.
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