US 12,318,829 B2
Air conduit spirally wound and provided with a plurality of holes, related manufacturing machine and method and related strip
Gino Guasti, Florence (IT)
Appl. No. 17/056,346
Filed by ZEFFIRO S.R.L., Florence (IT)
PCT Filed May 24, 2019, PCT No. PCT/IB2019/000459
§ 371(c)(1), (2) Date Nov. 17, 2020,
PCT Pub. No. WO2019/229518, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 102018000005813 (IT), filed on May 29, 2018; and application No. 102018000009504 (IT), filed on Oct. 16, 2018.
Prior Publication US 2021/0213506 A1, Jul. 15, 2021
Int. Cl. B21C 37/12 (2006.01); B21C 37/15 (2006.01)
CPC B21C 37/122 (2013.01) [B21C 37/126 (2013.01); B21C 37/128 (2013.01); B21C 37/157 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An Apparatus for forming a spirally wound conduit from a flat strip comprising:
a forming device comprising a bending section configured to spiralling bend the strip and a joining section configured to join opposite longitudinal sides of the strip each other;
a feeding device of the strip along a feeding direction (F) parallel to the longitudinal edges of the strip;
a cutting device arranged upstream the forming device comprising a cutting head for cutting the strip and moving means configured to move said cutting head along a plurality of moving axes orthogonal to each other;
a control unit configured to command said moving means according to a diameter of the conduit to be realized and to a width of the strip so that said cutting head realizes on the strip a plurality of arrays of holes each one tilted with respect to one of the longitudinal edges of the strip by an angle that is function of the width of the strip and of the diameter of the spiral conduit to be realized.