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US 11,761,147 B2Granted
Creasing method, creasing apparatus, and long fiber non-woven fabric
AssigneeEneos Corporation
InventorsToshikazu Kiyohara, Yuji Nishimura
Life of this patent
Estimating the term…
Abstract
A creasing method includes: a gripping and rotating step of bunching and gripping a continuously drawn long fiber non-woven fabric and rotating the gripped part so that the long fiber non-woven fabric is twisted and a first folding line is formed; a heating step of heating the twisted long fiber non-woven fabric to fix the first folding line; and a widening step of releasing the long fiber non-woven fabric having the first folding line formed thereon.
Claims14
A creasing method comprising:
- a gripping and rotating step of bunching and gripping a certain part of a continuously supplied long fiber non-woven fabric in a longitudinal direction and rotating the gripped part of the long fiber non-woven fabric within a plane intersecting a drawing direction of the long fiber non-woven fabric so that the long fiber non-woven fabric is twisted and a folding line in the longitudinal direction is formed on the long fiber non-woven fabric;
- a first heating step of heating the twisted long fiber non-woven fabric to fix the folding line to the long fiber non-woven fabric after the first gripping and rotating step;
- a first widening step of releasing the long fiber non-woven fabric having the folding line fixed thereto to widen the long fiber non-woven fabric in a width direction after the first heating step;
- a press-inserting step of press-inserting the long fiber non-woven fabric to be supplied to a pair of conveying bodies from an upstream side of the pair of conveying bodies into a gap between both conveying bodies while conveying the long fiber non-woven fabric having the folding line, formed in the longitudinal direction by performing the gripping and rotating step, the first heating step, and the first widening step once or a plurality of times, using the pair of conveying bodies so that the long fiber non-woven fabric overlaps with the long fiber non-woven fabric already sandwiched between both conveying bodies and a folding line is formed on the long fiber non-woven fabric in the width direction;
- and
- a second heating step of fixing a folding line in the width direction to the long fiber non-woven fabric by heating the long fiber non-woven fabric overlapped by the press-inserting step.
3 more elements
A creasing apparatus comprising:
- a first gripping and rotating part which is configured to bunch and grip a certain part of a continuously supplied long fiber non-woven fabric and configured to rotate the gripped part of the long fiber non-woven fabric within a plane intersecting a drawing direction of the long fiber non-woven fabric so that the long fiber non-woven fabric is twisted and a first folding line in the longitudinal direction is formed on the long fiber non-woven fabric;
- a first heating part which is disposed on a downstream side of the first gripping and rotating part in the drawing direction and configured to heat the long fiber non-woven fabric twisted by the first gripping and rotating part so that the first folding line is fixed to the long fiber non-woven fabric;
- a first widening part which is disposed on a downstream side of the first heating part in the drawing direction and configured to release the long fiber non-woven fabric having the first folding line fixed thereto by the first heating part so that the long fiber non-woven fabric is widened in a width direction;
- a second gripping and rotating part which is disposed on a downstream side of the first widening part in the drawing direction, which is configured to bunch and grip a certain part of the long fiber non-woven fabric, and configured to rotate the gripped part within a plane intersecting the drawing direction so that the long fiber non-woven fabric is twisted and a second folding line in the longitudinal direction is formed on the long fiber non-woven fabric;
- a second heating part which is disposed on a downstream side of the second gripping and rotating part in the drawing direction and configured to heat the long fiber non-woven fabric twisted by the second gripping and rotating part so that the second folding line is fixed to the long fiber non-woven fabric;
- and
- a second widening part which is disposed on a downstream side of the second heating part in the drawing direction and configured to release the long fiber non-woven fabric having the second folding line fixed by the second heating part so that the long fiber non-woven fabric is widened in the width direction.
4 more elements
Dependencies are inferred from the claim text.