Device and method for converting a web on a central...

Details Device and method for converting a web on a central... Device and method for converting a web on a central...

B - Operations, Transporting

41

F

B41F 13/14 (2006.01) A61F 13/02 (2006.01) A61H 23/06 (2006.01) B65H 16/02 (2006.01) B65H 16/04 (2006.01) B65H 23/06 (2006.01) B65H 35/00 (2006.01) B65H 37/00 (2006.01) B65H 37/04 (2006.01) B65H 39/00 (2006.01) B65H 39/14 (2006.01) B65H 39/16 (2006.01)

Patent

CA 2219123

A machine and method for converting a web having an indefinite length which includes a plurality of converting stations (34, A, B, C) circumferentially spaced about a process drum (22). At least one of the converting stations (34) includes a helical follower gear (52) operatively meshing with a helical drive gear (44) attached to the process drum (22). Movement of the follower gear (52) along its axial direction provides for the relative rotational registration of a tool (40a, 40b) on the registrable converting station (34) relative to the web. Further disclosed is a tensioning mechanism (210) for webs being unwound from supply rolls (260, 262) mounted coaxially side-by- side. Each web roll (260, 262) is mounted individually on a spindle (220, 230) which is individually breakable by means of a brake disk (226, 238).

Machine et procédé servant à convertir une bande continue de longueur non définie comprenant une multitude de postes de conversion (34, A, B, C) disposés sur le pourtour d'un tambour de production (22). Au moins un des poste de conversion (34) comprend un engrenage suiveur hélicoïdal (52) qui se met en prise avec un engrenage d'entraînement hélicoïdal (44) fixé au tambour de production lorsqu'il est en fonction. Le déplacement de l'engrenage suiveur (52) le long de son axe permet d'effectuer le repérage rotatif relatif d'un outil sur le poste de conversion réglable (34) par rapport à la bande continue. L'invention décrit également un dispositif tendeur (210) pour bandes continues se dévidant à partir de cylindres de distribution (260, 262) montés côte à côte sur le même axe. Chaque cylindre à bande continue (260, 262) est monté individuellement sur une broche (220, 230) que l'on peut immobiliser séparément au moyen d'une poulie-frein (226, 238).

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