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US 10,343,866 B2Granted
Dragging element for dragging web materials
AssigneeFutura S.P.A.
InventorsGiovacchino Giurlani, Roberto Gaspari
Life of this patent
Estimating the term…
Abstract
Dragging element for dragging web materials comprising at least a portion with at least one through cut (2) apt to engage a part (40) of a web material (4) intended to be moved in a direction imposed by the same dragging element that follows a predetermined operating path, said at least one cut (2) is helicoidal.
Claims20
A dragging element for dragging web materials, the dragging element comprising:
- a dragging element structure, at least a portion of said dragging element structure comprising an outer surface, said outer surface comprising a first outer surface portion and a second outer surface portion, said first outer surface portion being located adjacent to said second outer surface portion in a non-rotated state of said dragging element structure, said first outer surface portion and said second outer surface portion defining at least one through cut in said non-rotated state of said dragging element structure for engaging a part of a web material to be moved in a direction imposed by the dragging element structure that follows a predetermined operating path, said at least one through cut being helicoidal, said first outer surface portion being located at a spaced location from said second outer surface portion to define a peripheral opening in said outer surface in a rotated state of said dragging element structure, wherein two parts of said dragging element are rotated in opposite directions in said rotated state of said dragging element structure, said peripheral opening for receiving a web material such that a part of said web material is locked inside said at least one cut when said two parts of said dragging element are released.
A dragging element for dragging web materials, the dragging element comprising:
- a dragging element structure comprising an outer surface, said outer surface comprising a first outer surface portion and a second outer surface portion, said first outer surface portion and said second outer surface portion defining at least one through cut in said outer surface, each of said first outer surface portion and said second outer surface portion comprising a web material engaging surface for engaging a part of a web material to move the web material in a direction of the dragging element structure, said at least one cut comprising a helicoidal shape, said at least one through cut comprising a first dimension when said first outer surface portion and said second outer surface portion are in a non-rotated position, said first outer surface portion and said second outer surface portion defining a peripheral opening in said outer surface when said first outer surface portion and said second outer surface portion are in a rotated position, said peripheral opening comprising a second dimension, said first dimension being less than said second dimension, said at least one through cut receiving said part of said web material when said first outer surface portion and said second outer surface portion are in said rotated position.
A dragging element for dragging web materials, the dragging element comprising:
- a dragging element structure comprising a dragging element structure interior and an outer surface comprising an outer surface peripheral area, said outer surface peripheral area comprising at least one opening in said outer surface, said outer surface comprising a first circumferential edge portion and a second circumferential edge portion in said outer surface peripheral area, said first circumferential edge portion and said second circumferential edge portion defining said at least one opening, said first circumferential edge portion being located opposite said second circumferential edge portion, said at least one opening being in fluid communication with said interior, said dragging element cross sectional area comprising a web material engaging surface for engaging a part of a web material to move the web material in a direction of the dragging element structure, said at least one opening comprising a helicoidal shape, said first circumferential edge portion and said second circumferential edge portion defining said web material engaging surface.
Dependencies are inferred from the claim text.