Infusion package and their manufacture

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 81/34 (2006.01) B65B 29/04 (2006.01) B65D 81/00 (2006.01)

Patent

CA 2260232

A process and apparatus are described for producing drawstring packets. The packets are produced by forming thread loops (L) with tags (T) attached to their ends and placing the packet web material (W) onto the portions of the loops further from the tags. After securing the loops in their shaped form temporarily to one face of the web, the tags and the remaining portions of thread are placed on the other face of the web to be attached there releasably. In subsequent processing the secured loop portions lie inside the packets and the tags outside. The process allows relatively precise location of the loops so that packets can be produced with the loops in a peripheral channel (P) sealed from the contents of the packets but able to move to contract the package when the ends of the loop are pulled.

L'invention concerne un procédé et un appareillage servant à produire des sachets à infusion munis d'un cordon. On produit ces sachets en formant des boucles (L) avec le fil, en fixant une étiquette (T) aux extrémités de celui-ci, et en plaçant le matériau bande de sachet (W) sur les parties de boucles éloignées des étiquettes. Après fixation temporaire des boucles, dans leur mise en forme, à l'une des faces de la bande, les étiquettes et les parties restantes de fil sont placées sur l'autre face de la bande, pour y être fixées de façon libérable. Dans un traitement subséquent, les parties de boucles fixées se trouvent à l'intérieur du sachet, et les étiquettes à l'extérieur. Le traitement permet un placement relativement précis des boucles, de sorte qu'on peut produire les sachets avec des boucles se trouvant dans un canal périphérique (P), isolées par sceau du contenu des sachets, mais susceptibles de se mouvoir pour resserrer le conditionnement lorsqu'on tire les extrémités du cordon.

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