	US 11,807,960 B2
	Free fibre padding structure and method for the production thereof
Lucio Siniscalchi, Milan (IT); and Patrizio Siniscalchi, Milan (IT)
Assigned to FISI FIBRE SINTETICHE S.P.A., Oggiono (IT)
Appl. No. 16/637,694
Filed by Fisi Fibre Sintetiche S.P.A., Oggiono (IT)
PCT Filed Sep. 3, 2018, PCT No. PCT/IB2018/056703 § 371(c)(1), (2) Date Feb. 7, 2020, PCT Pub. No. WO2019/049015, PCT Pub. Date Mar. 14, 2019.
Claims priority of application No. 102017000099945 (IT), filed on Sep. 6, 2017.
Prior Publication US 2021/0148021 A1, May 20, 2021
Int. Cl. D01G 7/00 (2006.01); D04H 1/4391 (2012.01); D04H 1/50 (2012.01); D01G 13/00 (2006.01); D01G 15/02 (2006.01); D04H 1/4382 (2012.01); D04H 1/02 (2006.01)

CPC D01G 7/00 (2013.01) [D01G 13/00 (2013.01); D01G 15/02 (2013.01); D04H 1/43918 (2020.05); D04H 1/50 (2013.01); D04H 1/02 (2013.01); D04H 1/43825 (2020.05); D04H 1/43835 (2020.05)]

4 Claims

1. A method for the manufacture of a free fibre or loose fibre padding, said fibre padding comprising a plurality of free or loose fibres, said free or loose fibres having a length ranging between 2 and 28 mm, with a titre or count that ranges between 0.8 den and 4 den; said method comprising sequential steps of:

feeding said fibres through a bale opener;

pneumatically sending said fibres into a ventilation chamber which performs suction of said fibres by means of two rotating cylinders which start to open said fibres;

feeding said fibres through a subsequent sector with rotating discs; and

completing separation of said fibres from one another in a subsequent opener;

whereby during said sequential steps said fibres being brought to a temperature ranging between 50 and 80° C. and being moved by ventilation systems that cause said fibres to curl.