Patent ID: 9403333
Filing Date: 2016-08-02
CPC Classification: B29C,B29D,B29K,B29L

Claim Text:
1. An assembly of an automatic zipper device and a support arm for joining two joint end portions of a sheet member while moving the joint end portions after the sheet member has been wound around a molding drum periphery, the assembly comprising: a roller assembly configured to take in the sheet member into the device; a pair of bevel gears that are configured to bite between teeth meshing with each other while being rotated and driven and join the joint end portions of the sheet member taken into the device; a clamping cylinder positioned forward of the axles of the pair of bevel gears in a traveling direction of the bevel gears and having a piston rod rotatably connected to an upper end of a dogleg-shaped arm that is pivotally connected to a support frame body supporting a press at a lower end of the support frame, and configured to clamp the sheet member passing through the bevel gears at a predetermined position, the support arm having an upper end swingably connected to a lateral movement device forward of the automatic zipper device in a traveling direction of the automatic zipper device and a lower end swingably connected to the automatic zipper device, and wherein the sheet member includes a rubber member, the sheet member having magnet-attractive metallic cords embedded therein, and wherein the clamping cylinder, as the piston rod of the clamping cylinder is extended, lifts the support frame body together with the press to press the sheet member against the bevel gears and a position stabilizing magnet on each of opposite sides of the pair of bevel gears and coextensive with the bevel gears along a direction parallel to the traveling direction of the bevel gears, and maintain the sheet member at the predetermined position.