B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 8/12 (2006.01) B65D 51/16 (2006.01)
Patent
CA 2204459
A container and end adapted for closing and sealing the container with a double-seaming operation is provided which permits evacuating and back-flushing of gases out of and into the container while the end is in a seated and unseamed position on the container during the closing operation. The end includes a central circular panel, a chuck wall surrounding an outer periphery of the central panel and extending radially outwardly and upwardly from the central panel and a crown seaming panel surrounding the chuck wall and extending radially outwardly from the chuck wall and having an outer curled end for being double-seamed with a flanged upper end portion of the container for closing of the container. The end preferably includes sealing compound positioned on an inside surface of the chuck wall and the crown seaming panel. Separate projections are formed in the chuck wall and in the crown seaming panel of the end and extend inwardly and radially of the chuck wall and crown seaming panel, respectively, and are spaced around the chuck wall and the crown seaming panel for engaging the flanged upper end of the container being closed for forming gas channels between the respective projections and between the flanged upper end of the container and the chuck wall and the crown seaming panel of the end when such end is in a seated and unseamed position on the container during closing and prior to completion of the double-seaming operation.
Cette invention concerne une boîte et un couvercle à assembler par sertissage en deux passes qui permet l'évacuation d'air ainsi que l'injection de gaz dans la boîte et son évacuation avant la passe de serrage étanche du serti. Le couvercle comprend une partie circulaire centrale, une paroi de cuvette autour de la périphérie extérieure de la partie circulaire centrale se projetant obliquement vers le haut et l'extérieur et un bord à sertir autour de la paroi de cuvette se prolongeant radialement vers l'extérieur et présentant à sa périphérie un ourlet à sertir en deux passes autour du bord à sertir de la boîte pour réaliser la fermeture étanche de la boîte. Le couvercle comprend de préférence un joint déposé sur la surface intérieure de la paroi de cuvette et de la couronne du bord à sertir. Des saillies se prolongeant radialement vers le centre du couvercle sont formées de place en place sur la paroi de cuvette et la couronne du bord à sertir afin de former entre elles, lorsqu'elles sont appuyées contre le bord à sertir de la boîte, des canaux pour l'injection et l'évacuation de gaz avant la seconde passe de l'opération de sertissage, soit l'écrasement.
Bacon John Ellis
Westphal Teddy M.
Sim & Mcburney
Sonoco Products Company
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