Sealing roller and sealing roller element particularly for...

Details Sealing roller and sealing roller element particularly for... Sealing roller and sealing roller element particularly for...

B - Operations, Transporting

29

C

B29C 65/18 (2006.01) A61F 13/20 (2006.01)

Patent

CA 2634718

An apparatus for thermally bonding a cover material onto an absorbent, fibrous web has a substantially cylindrical, rotatable sealing roller and a rotatable anvil roller disposed adjacent the sealing roller to provide a nip therebetween. The cover material and fibrous web can be sealed and calendered in the nip of this apparatus. The sealing roller includes a sealing element and an ironing element, and both of these elements have thermally conductive material and a leading and a trailing end in the direction of rotation. The sealing roller has at least one pair of sealing and ironing elements positioned sequentially on the circumferential surface of the sealing roller in the direction of rotation. At least one end of the ironing element is thermally insulated from an adjacent end of an adjacent sealing element.

Appareil pour relier thermiquement un matériau de revêtement et une bande fibreuse absorbante. Ledit appareil est doté d'un rouleau de soudage rotatif cylindrique et d'un rouleau contre-partie adjacent au rouleau de soudage pour ménager une zone de contact entre chacun. Le matériau de revêtement et la bande fibreuse peuvent être soudés et calendrés dans la zone de contact de l'appareil. Le rouleau de soudage comprend un élément de soudage et un élément d'étirage, les deux éléments comportant un matériau thermoconducteur et des extrémités avant et arrière disposées dans le sens de rotation. Le rouleau de soudage comporte au moins une paire d'éléments de soudage et d'étirage placés séquentiellement sur la périphérie du rouleau de soudage dans le sens de rotation. Au moins l'une des extrémités de l'élément d'étirage est thermiquement isolée de l'extrémité adjacente de l'élément de soudage adjacent.

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