Lamina type modulated thread braking device for weft feeders
AssigneeL.G.L. Electronics S.p.A.
InventorsPietro Zenoni, Giovanni Pedrini
Life of this patent
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Abstract
A modulated thread beating device for weft feeders has a first lamina and a second lamina that are arranged opposite one another and are supported by pairs of fixed and respectively movable bars that engage the ends of the respective laminae, flexing them in an arched shape; the laminae are arranged opposite each other at their convex face. The movable bars are supported by a corresponding movable element which is suspended elastically and is provided with an energization coil that is subjected to the field of a permanent magnet. The coil of the movable element is supplied with an energization current that is modulated in proportion to the advancement speed or mechanical tension of the thread.
Claims11
Modulated thread braking device for weft feeders, comprising
- a first lamina and a second lamina that are arranged opposite one another and are supported by pairs of fixed and respectively movable bars that engage the ends of the respective laminae, flexing them in an arched shape in order to define a respective convex face,
- said laminae being arranged opposite each other at their convex face;
- said movable bars being supported by a corresponding movable element which is suspended elastically and is provided with an energization coil that is subjected to the field of a permanent magnet;
- and
- said device further comprising means for supplying said coil of the movable element with an energization current that is modulated in proportion to the advancement speed or mechanical tension of said thread.
Dependencies are inferred from the claim text.