Patent ID: 11946167
Assignee: MONTEFIBRE MAE TECHNOLOGIES S.R.L.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D  B | IPC B  D

Claim 7:
8. A wet-spinning apparatus, comprising at least one washing or washing and stretching unit U, said unit U comprising:
a washing tank configured for containing a washing solution;
wherein said solution is fed to a first end of said tank at a first temperature T1 and wherein said solution is discharged at a second end of said tank at a second temperature T2, said temperature T1 being higher than said temperature T2;

mechanical means configured for moving a tow or bundle of filaments from said first end to said second end of the tank;
wherein in the washing tank, the movement direction of the washing solution is in co-current with respect to the movement direction of the tow or bundle of filaments; and
further wherein the solution being discharged at the second end of said washing tank at the second temperature T2, is fed through an overflow and a filter to an auxiliary recycling tank where a first portion of said solution is fed by means of a pump to an auxiliary heating tank, equipped with a heat exchanger, said auxiliary heating tank being configured for feeding said washing solution to the first end of said washing tank at the first temperature T1.