US 12,459,032 B2
Method and apparatus for binding metal wires and similar products
Elia Priuli, Colli al Metauro (IT)
Assigned to SCHNELL S.P.A., Colli al Metauro (IT)
Appl. No. 18/026,755
Filed by SCHNELL S.P.A., Colli al Metauro (IT)
PCT Filed Sep. 16, 2021, PCT No. PCT/IT2021/050284
§ 371(c)(1), (2) Date Mar. 16, 2023,
PCT Pub. No. WO2022/059044, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 102020000021862 (IT), filed on Sep. 16, 2020.
Prior Publication US 2023/0347405 A1, Nov. 2, 2023
Int. Cl. B21F 7/00 (2006.01); B21F 15/04 (2006.01); E04G 21/12 (2006.01)
CPC B21F 7/00 (2013.01) [B21F 15/04 (2013.01); E04G 21/123 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for binding metal wires to a first element and to a second element comprising the steps of:
a. arranging said first element and said second element in a superimposed crossed configuration, so as to define four respective quadrants (Q1, Q2, Q3, Q4) at a crossing zone on a plane containing the longitudinal axis (Y) of one of said first element and said second element and the projection (P) of the longitudinal axis of the other one;
b. inserting a calendering assembly mounted around a binding axis (A, A′) in front of a binding apparatus, abutting against at least one of said first element and said second element, at said crossing zone, engaging said four quadrants (Q1, Q2, Q3, Q4) with respective winding prongs of said calendering assembly;
c. feeding through said calendering assembly arranged at said crossing zone a wire and a further wire, performing a first winding wound between two of the four said quadrants (Q1, Q2, Q3, Q4) by calendering and having a first pair of opposite branches of said wire, and a second winding wound between the remaining two of said four quadrants (Q1, Q2, Q3, Q4) and having a second pair of opposite branches of said further wire, around said first element and/or said second element;
d. cutting said wire and said further wire, in a suitable phase relationship, by means of a cutting assembly of said binding apparatus, thus obtaining a respective pair of ends for each winding;
e. holding said ends of said first pair and said second pair of the opposite branches by means of a binding head of said binding apparatus, mounted inside said calendering assembly and rotatable around said binding axis (A, A′);
f. rotating said binding head around said binding axis (A, A′), to twist together said first pair and said second pair of opposite branches, held by said ends by said binding head, around said binding axis (A, A′), obtaining an at least double binding around said first element and said second element, in which said opposite branches converge from each of said quadrants (Q1, Q2, Q3, Q4) to said binding axis (A, A′).