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US 11,833,733 B2Granted
Method and apparatus for producing elastic laminates
AssigneeFameccanica.Data S.p.A.
InventorVincenzo Pezzotta
Life of this patent
Estimating the term…
Abstract
A method and apparatus for producing elastic laminates wherein a first and a second elastic film are stretched in the transverse direction by respective spreader devices, and are applied on a transfer wheel which—in turn—applies the first and second elastic films on a non-woven web held on the outer cylindrical surface of an anvil wheel.
Claims10
A method for producing elastic laminates, comprising:
- feeding a first and a second elastic film,
- stretching the first and second elastic films in a transverse direction on a first and a second spreader device,
- applying the first and second elastic films stretched in the transverse direction on an outer circumferential surface of a transfer wheel rotatable around a first axis of rotation, wherein the first and second elastic films are applied onto the outer circumferential surface of the transfer wheel in a first and a second application zone axially and angularly displaced with respect to each other with respect to said first axis of rotation,
- applying a first non-woven web on an outer cylindrical surface of an anvil wheel rotatable around a second axis of rotation parallel to the first axis of rotation,
- transferring the first and second elastic film from the transfer wheel to the first non-woven web held on the outer cylindrical surface of the anvil wheel in a third and a fourth application zone displaced with respect to each other in an axial direction and angularly aligned with each other with respect to said second axis of rotation,
- applying a second non-woven web on the anvil wheel above said first and said second elastic films, and
- forming an elastic laminate by fixing on the anvil wheel the first and second non-woven web through the first and second elastic films.
4 more elements
An apparatus for producing elastic laminates, comprising:
- a first and a second feeding device configured to feed a first and a second elastic film,
- a first and a second spreading device configured to stretch the first and second elastic films in a transverse direction,
- a transfer wheel rotatable around a first axis of rotation and having an outer circumferential surface, wherein the first and second spreading devices are configured to apply the first and second elastic films stretched in the transverse direction on the outer circumferential surface of the transfer wheel in a first and a second application zone axially and angularly displaced with respect to each other with respect to said first axis of rotation of the transfer wheel,
- an anvil wheel rotatable around a second axis of rotation parallel to the first axis of rotation, wherein the transfer wheel is tangent to the anvil wheel in a transfer area, and is configured to transfer the first and second elastic film to the anvil wheel in a third and a fourth application zone displaced with respect to each other in an axial direction and aligned with each other in an angular direction with respect to the second axis of rotation of the anvil wheel,
- a third feeding device configured to feed a first non-woven web on an outer cylindrical surface of the anvil wheel upstream of said transfer area, or at said transfer area,
- a fourth feeding device configured to feed a second non-woven web to the anvil wheel downstream of said transfer area, and
- a fixing unit cooperating with the anvil wheel and configured to join to each other the first and second non-woven web through the first and second elastic films.
4 more elements
Dependencies are inferred from the claim text.