Device to control the feeding of the strap in a strapping...

B - Operations – Transporting – 65 – B

Patent

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Details

B65B 13/22 (2006.01)

Patent

CA 2199928

Device to control the feeding of the strap in a strapping machine, comprising at least one fast driving wheel (4) and one slow driving wheel (2) which are mounted on fixed axes, the strap (R) being guided on the periphery of both said driving wheels, and wherein pressure means (5 and 14) are provided to press the strap (R) against the periphery of one and/or the other of said driving wheels, so as to ensure feeding thereof, said pressure means being mounted on an oscillating sector (8) which is operated in response to tensioning of the strap; on said oscillating sector (8) there is also mounted a strap transmission wheel (13), located at a distance from said pressure means, which imparts on the oscillating sector (8), according to the tension of the strap (R), an oscillation such as to transfer the contact pressure of the strap from the fast driving wheel (4) - for the fast recovery step - onto the slow driving wheel (2) - for the slow tightening step - merely through the alternative action of said pressure means.

Dispositif servant à commander l'alimentation en feuillard d'une cercleuse. Il comporte au moins une roue entraîneuse rapide (4) et une roue entraîneuse lente (2) montées sur des axes fixes, le feuillard (R) étant guidé autour de la circonférence des deux roues entraîneuses en question. Des moyens de serrage (5 et 14) sont fournis pour serrer le feuillard (R) sur le pourtour de l'une et/ou l'autre des roues entraîneuses, de manière à en assurer l'acheminement, et ils sont montés sur un secteur oscillant (8) qui répond à la tension du feuillard; sur ce secteur oscillant (8) est monté une roue de transmission (13) de feuillard, située à une certaine distance des moyens de serrage, qui transmet une oscillation au secteur oscillant (8), selon la tension du feuillard (R), de manière à faire passer la pression de contact du feuillard de la roue entraîneuse rapide (4), pour l'étape de récupération rapide, à la roue entraîneuse lente (2), pour l'étape de serrage lent, par la seule action alternée de ces moyens de serrage.

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