Device and method for stretching
AssigneePicanol N.V.
InventorsJean Marie Bamelis, Chris Delanote, Jozef Peeters
Life of this patent
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Abstract
A thread stretching device for a weaving machine, especially an air jet weaving machine, includes a thread gripper (22) for gripping the weft thread (10) as a device for stretching a weft thread inserted into a shed. A mechanism (23) for deflecting the weft thread is arranged upstream of the thread gripper, relative to the weft thread transport direction.
Claims25
An apparatus for stretching a weft thread inserted into a weaving shed of a weaving machine, for example an air-jet weaving machine, comprising a thread clamp disposed on that side of the weaving shed opposite the insertion side actuatable by means of a control unit for clamping the inserted weft thread, and further comprising upstream of said clamp, relative to the weft thread transporting direction and on the same side of the shed as said clamp, a deflecting device actuatable by said control unit for deflecting the weft thread, said thread clamp and said deflecting device being separately actuatable, such that said thread clamp prevents an inserted weft thread from snapping back into the shed.
A method for stretching a weft thread after its insertion into a weaving shed of a weaving machine, for example an air-jet weaving machine, comprising clamping the weft thread by a clamping device under control of a control unit at a time at least approximately at the end of the insertion on the side of the shed opposite the insertion side and then tensioning the clamped weft thread by deflection of the weft thread at the side of the shed opposite the insertion side by a deflecting device located upstream of the clamping device until it is beaten up, including actuating the clamping and deflecting devices by separate actuators, said clamping device preventing an inserted weft thread from snapping back into the shed.
Dependencies are inferred from the claim text.