US 10,414,123 B2Granted

Three-dimensional composite tape, method and apparatus for its production

AssigneeFameccanica.Data S.p.A.

InventorsGuido Bonelli, Domenico Polidori

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Abstract

A composite tape comprising a first web and a second web welded together according to a welding pattern comprising a plurality of welding points arranged in arrays extending along a first direction and spaced apart in a second direction, perpendicular to said first direction, with adjacent arrays offset from each other in said first direction, and with said welding points in each array arranged in groups spaced apart in said first direction, wherein the first web has a plurality of hollow protrusions alternating with welding points, both in said first direction and in said second direction, and wherein the second web has a plurality of ribs extending along said first direction and separated from each other by said arrays of welding points.

Claims7

Dependent claims

A method for producing a composite tape, comprising the steps of:

arranging a welding unit including an anvil roller and a welding element defining a welding gap therebetween,
advancing a first and a second web in direct contact with each other through the welding gap, and
welding directly together only the first and the second webs with a welding pattern comprising a plurality of welding points arranged in arrays extending along a first direction and spaced apart in a second direction perpendicular to the first direction, with adjacent arrays offset from each other in the first direction, and with the welding points in each array arranged in groups spaced apart in the first direction at a first distance greater than a second distance between individual welding points within each group, wherein:
the advancing speed of the first web towards the welding unit and the advancing speed of the second web towards the welding unit are different from each other and wherein the advancing speed of at least one of the webs is less than the peripheral speed of the anvil roller.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/256,221Filed 2 Sep 2016
Priority: IT 1020150000496718 Sep 2015
Published: US 2017/0066219 A19 Mar 2017
Granted: 17 Sep 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification36 codes

B32B 7/05
Interconnection of layers: the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
A61F 13/15699
Apparatus or processes for manufacturing: forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or…
A61F 13/15707
Apparatus or processes for manufacturing: mechanical treatment, e.g. notching, twisting, compressing, shaping
A61F 13/15731
Mechanical treatment, e.g. notching, twisting, compressing, shaping: treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing