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US 12,427,728 B2Granted
Reduced-friction drive device
AssigneeAisapack Holding S.A.
InventorGaël Bussien
Life of this patent
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Abstract
Device for forming a tube, for example a packaging tube, from a sheet (3), said device comprising at least one welding rod (2), means for welding and pressurizing the welded zone (7-9) and means (4-6) for driving the sheet (3) along the rod (2). The device also comprises means (10-12, 14) that reduce the friction between the welding rod (2) and the sheet (3).
Claims16
A welding device for forming a packaging tube from a sheet, the welding device comprising:
- a welding rod, the sheet being wrapped around the welding rod;
- a device configured to weld and pressurize ends of the sheet with a welding zone using an outer welding belt and an inner welding belt, the outer welding belt and the inner welding belt pressurizing and welding the ends of the sheet;
- a mechanism configured to drive the sheet along the welding rod, said mechanism comprising at least one drive belt in contact with an outer face of the sheet;
- and
- a friction-reducing device configured to reduce a friction between the welding rod and the sheet, the friction-reducing device being in contact with the sheet and moving at a same speed as the sheet relative to the welding rod, the friction-reducing device including at least one antifriction belt in contact with an inner face of the sheet, the at least one antifriction belt being disposed opposite said at least one drive belt.
2 more elements
Dependencies are inferred from the claim text.