Heat sealer for stretch wrapping apparatus

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 65/10 (2006.01) B29C 65/00 (2006.01) B65B 11/00 (2006.01) B65B 11/02 (2006.01) B65B 51/20 (2006.01)

Patent

CA 2447620

A heat sealing device (100) for sealing layers of plastic film together is provided. In a preferred embodiment, the heat sealing device (100) is incorporated into a stretch wrapping apparatus (1000) for wrapping a load. The heat sealing device (100) includes a heater element (150), an air compressor or blower (160), and a sealing head (110) in fluid communication with the heater element (150) to distribute the heated air. The sealing head (110) is preferably flexible and includes a plurality of convection ports configured to apply heated air to a portion of the packaging material without being completely covered by the packaging material. At least one insulated film contact portion (134) is provided to distance the convection ports from the plastic film.

Cette invention concerne un dispositif (100) de thermoscellage servant à sceller des couches de film plastique entre elles. Dans un mode de réalisation préféré de la présente invention, le dispositif (100) de thermoscellage est intégré à un appareil (1000) d'emballage sous film étirable servant à emballer une marchandise. Ce dispositif (100) de thermoscellage comprend un élément de chauffage (150), un compresseur d'air ou un ventilateur (160) ainsi qu'une tête de scellage (110) qui est en communication fluidique avec l'élément de chauffage (150) afin de diffuser l'air chaud. Cette tête de scellage (110) est de préférence flexible et comprend une pluralité d'orifices de convection conçus pour envoyer l'air chaud sur une partie d'un matériau d'emballage sans être entièrement recouverts par le matériau d'emballage. Au moins une partie de contact (134) de film d'isolation est utilisée pour séparer les orifices de convection du film plastique.

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