Abstract: The needle selection device has multiple selectors arranged in axial grooves formed in the skirt of the needle cylinder, each selector arranged below a needle and oscillatable in a radial plane of the needle cylinder from an active position, in which a butt protrudes radially from its groove, for the engagement of the butt with cams for actuating the selectors arranged around the needle cylinder to move the selectors along their groove in the needle cylinder so as to activate the overlying needle, to an inactive position, in which the selector is positioned in its groove in the needle cylinder so that it does not interfere with the selector actuation cams. The device has selector extraction elements to transfer the selectors from the inactive position to the active position and selection elements to transfer the selectors from the active position to the inactive position or to keep them in the active position.

Abstract: The knitting machine with needle selection device has a plurality of needles or sub-needles each having a body with at least one magnetized portion. A selection element faces the magnetized portion and is constituted by a plate which is physically separate from the body of the needle or sub-needle and is made of a material which can be magnetized. The selection device has a magnetizing device which acts controllably upon the selection element of the various needles or sub-needles in order to induce a magnetic interaction between the magnetized portion of the body of the needle or sub-needle and the selection element itself. Actuation cams act on the body of the needle or sub-needle, after the action of the magnetizing device, and cause a diversified actuation of the needle or sub-needle depending on the magnetic interaction induced between the portion of the body of the needle or sub-needle and the selection element.

Abstract: The single-cylinder circular knitting machine has a vertically arranged needle cylinder with a skirt defining a plurality of axial grooves. Each groove slidingly accommodates a needle. A platen is arranged coaxially above the needle cylinder, and a plurality of radial grooves is defined therein. Each one of the radial grooves accommodates a hook which is movable by the action of actuation cams which can be engaged, during rotation of the platen about its axis, with a heel of the hooks, from a position in which the hooks are retracted in the platen to an extraction position, and vice versa. The machine is provided with a hook locking device which is arranged proximate to the platen and is controllably engageable with the hooks to keep them in the retracted position in the platen.

Abstract: The single-cylinder circular machine comprises a substantially vertical needle cylinder which is rotatable about an axis and supports a plurality of needles which are arranged in axial grooves of the outer skirt of the needle cylinder and can move individually along directions which are parallel to the needle cylinder axis. A platen is arranged coaxially above the needle cylinder and is supported, so as to be rotatable about the needle cylinder axis, by the supporting structure of the machine. The machine comprises first connecting members which can be controllably activated or deactivated in order to rigidly associate the platen, in its rotation about the axis, with the needle cylinder, and second connecting members arranged on a wing of the platen which extends inside the needle cylinder and on a portion of the inner surface of the needle cylinder which faces the wing.

Abstract: The direct drive circular knitting machine has a main structure rotatably supporting a needle cylinder having a needle cylinder axis. An electric motor is provided for rotating the needle cylinder with respect to the main structure about the needle cylinder axis. The electric motor has a rotor rigidly and coaxially connected to the needle cylinder, and a stator located adjacent to the rotor and supported by the main structure.