Heater wire for device such as impulse heat sealer

Details Heater wire for device such as impulse heat sealer Heater wire for device such as impulse heat sealer

B - Operations, Transporting

65

B

B65B 51/10 (2006.01) B29C 65/22 (2006.01) H05B 3/12 (2006.01) B29C 65/38 (2006.01)

Patent

CA 2376060

A heater wire which is applied to an impulse heat sealer, a bookbinding machine, a laminator, an image-creating device, and so on. A thin sheet of resistant material such as an iron-chromium alloy is further thinned by rolling, properly strengthened by quenching, and processed by photoetching so that the width of a heat-generating part is small and those of the electrodes are larger than that, thus integrally producing a heater wire. The heat- generating part of the heater wire is zigzag at such small intervals that the zigzag pattern disappears on a sealing line or plane because of heat diffusion, and the width of the zigzag is uniformly narrow and almost equal to that of the required shape. Therefore, the drawback on connection between the heat-generating part and electrodes is solved and the resistant wire is matched with the power supply voltage because of its relatively fine and long structure.

L'invention porte sur l'élaboration d'un fil chauffant pour thermoscelleurs à impulsions, relieuse, lamineur, dispositif créateur d'images etc. On utilise à cette fin une feuille mince d'un matériau résistant tel qu'un alliage de ferrochrome, encore amincie par laminage, puis durcie par trempe, puis traité par photogravure de manière à ce que la largeur de la partie chauffante soit faible, et celle des électrodes plus importante, ce qui donne un fil chauffant d'une seule pièce. La partie chauffante du fil est en zigzag, mais avec des intervalles si réduits que le motif en zigzag disparaît sur la ligne ou sur le plan de scellement, la largeur des zigzag étant uniformément étroite et presque égale à la forme requise. On élimine ainsi l'inconvénient que représentent les connexions entre la partie chauffante et les électrodes, alors que le fil est adapté à la tension d'alimentation de par sa structure relativement fine et longue.

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