An optical sealing clamp and a method for sealing and...

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 26/42 (2006.01)

Patent

CA 2546870

The invention is specially directed towards intermittent motion packaging machines where the packages are momentarily immobilized at a forming station for the time duration of the package sealing and cutting. The polymeric sheets or films (24) are sealed and cut after being exposed to a laser beam (20) in a controlled and optimized manner. The laser beam (20) is shaped with appropriate optical elements (56) to provide a desired intensity profile in the section of the films to be sealed or sealed and cut. With this method, a package (15) can be sealed and cut simultaneously in one exposure step. An optical clamp (30, 31) holds the films (40, 41) together while they are being sealed by the laser (20). The optical clamp (30, 31) can reflect back to the films, partially or totally, the laser beam intensity that has not been previously absorbed. The optical clamp (30, 31) further allows to monitor the sealing and cutting process while the process is being performed.

L'invention concerne, en particulier, des machines d'emballage à déplacement intermittent dans lesquelles lesdits emballages sont momentanément immobilisés au niveau d'une station de formage pendant la durée du scellement et de la découpe de ces emballages. Des feuilles ou des films polymères (24) sont scellés et découpés après avoir été exposés à un faisceau laser (20) de manière contrôlée et optimisée. Ledit faisceau laser (20) est mis an forme au moyen d'éléments optiques (56) appropriés afin de fournir un profil d'intensité désirée dans la section des films à sceller ou à sceller et à découper. Ce procédé permet de sceller et de découper un emballage (15) simultanément en une seule étape d'exposition. Une pince optique (30, 31) maintient les films (40, 41) ensemble pendant leur scellement au moyen du laser (20). Ladite pince optique (30, 31) peut renvoyer aux films, partiellement ou totalement, l'intensité du faisceau laser qui n'a pas été absorbée. La pince optique (30, 31) permet également de surveiller le processus de scellement et de découpe pendant l'exécution dudit processus.

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