Abrégé

A machine (1) for forming knotted fence mesh has a plurality of side by side knot boxes (6). Each knot box (6) is for forming a knot at an intersection between a line-wire (2) and a stay-wire (4). Each of the knot boxes (6) has a first pair of formers configured to move towards the line-wire-stay-wire intersection from a front side forming a knot at the line-wire-stay-wire intersection at each operation of the knot box (6), and a second pair of formers configured to move towards the line-wire-stay-wire intersection from a rear side at each operation of the knot box (6). The machine has a cam drive system configured to move a plurality of the first pair of formers and the second pair of formers at each operation of the knot boxes (6). The cam drive system has a front cam assembly having a front pair of cams (20, 21) associated with the first pair of formers and a rear cam assembly having a rear pair of cams (17, 18) associated with the second pair of formers, wherein each of the cams (17, 18, 20, 21) has a respective profile. The profiles of each of the front pair of cams (20, 21) associated are configured such that during a sector of a rotation of the front pair of cams (20, 21) associated, one of the first pair of formers accelerates while the other of the first pair of formers simultaneously decelerates.

Classes IPC  ?

• B21F 27/00 - Fabrication de grillages ou treillis métalliques

Abrégé

A fence mesh comprises line wires, stay wires extending laterally across and intersecting the line wires to form a mesh, a wire knot around the line wire and stay wire at intersections of the stay wires and with many of the line wires, and the stay wire is wound around the line wire such that the stay wire can pivot about the line wire at intersections of the stay wires with one or a minor number of the line wires, to make a pivot joint within the fence mesh. A machine and method for forming the fence mesh are also disclosed.

Classes IPC  ?

• E04H 17/02 - Clôturage en fil métallique, p. ex. en treillage métallique