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US3756043A Expired / Lapsed US ⏱️ 0.0 years remaining

Flat warp knitting machines

Assignee: Wirkmaschinenbau Karl Marx Veb
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Filing: 1971-11-11
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Granted: 1973-09-04
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Expires: 1991-11-11
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Abstract

Abstract A flat warp knitting machine comprising two parallel endless chains mounted for continuous revolution in the same direction and at the same speed, a plurality of hooks mounted on the chains in a plane, a weft yarn layer mounted for traversal between the two chains in a plane spaced slightly from a plane in which the chains lie and adapted to engage in a plane at least one weft yarn, and means adjacent each of the chains for pressing each of the weft yarns under a respective hook of one of the chains when the weft yarn layer is adjacent the one chain, the improvement comprising adjacent each of the chains in proximity to the points of reversal of the traverse of the weft yarn layer means for retaining each weft yarn, the retaining means being stationary in the direction of movement of the chains and being mounted in a plane between the plane in which the weft yarn layer engages the weft yarns and the plane in which the chain hooks are mounted, and means adjacent each of the chains for casting off each weft yarn on the retaining means of one of the chains when the weft yarns are being fed to the hooks of the other chain.

Inventors

  • 👤 H Kemter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 14:45
CPC Classifications
D; D04; D04B; D04B23/00; D04B23/12

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 265 words
In a flat warp knitting machine comprising two parallel endless chains mounted for continuous revolution in the same direction and at the same speed, a plurality of hooks mounted on the chains in a plane, a weft yarn layer mounted for traversal between the two chains in a plane spaced slightly from a plane in which the chains lie and adapted to engage at least one weft yarn and lay said at least one weft yarn between said chains in a plane parallel to the plane of traversal of the weft yarn layer, and means adjacent each of said chains for pressing each of said weft yarns under a respective hook of one of said chains when the weft yarn layer is adjacent said one chain, the improvement comprising adjacent each of the chains in proximity to the points of reversal of the traverse of the weft yarn layer means for looping each weft yarn, said looping means being stationary in the direction of movement of the chains and each including means for retaining one of the weft yarns, each of said retaining means being positioned, when the weft yarn layer reaches the point of reversal in proximity to the retaining means, in a plane between the plane in which the weft yarn layer lays the weft yarns and the plane in which the chain hooks are mounted, and means adjacent each of said chains for casting off each weft yarn on the retaining means of one of said chains when the weft yarns are being fed to the hooks of the other transfer chain.
Claim 2
Dependent Claim 265 words
In a flat warp knitting machine comprising two parallel endless chains mounted for continuous revolution in the same direction and at the same speed, a plurality of hooks mounted on the chains in a plane, a weft yarn layer mounted for traversal between the two chains in a plane spaced slightly from a plane in which the chains lie and adapted to engage at least one weft yarn and lay said at least one weft yarn between said chains in a plane parallel to the plane of traversal of the weft yarn layer, and means adjacent each of said chains for pressing each of said weft yarns under a respective hook of one of said chains when the weft yarn layer is adjacent said one chain, the improvement comprising adjacent each of the chains in proximity to the points of reversal of the traverse of the weft yarn layer means for looping each weft yarn, said looping means being stationary in the direction of movement of the chains and each including means for retaining one of the weft yarns, each of said retaining means being positioned, when the weft yarn layer reaches the point of reversal in proximity to the retaining means, in a plane between the plane in which the weft yarn layer lays the weft yarns and the plane in which the chain hooks are mounted, and means adjacent each of said chains for casting off each weft yarn on the retaining means of one of said chains when the weft yarns are being fed to the hooks of the other transfer chain.
Claim 3
Dependent Claim 36 words
A machine according to claim 1, in which the retaining means comprise hooks and the hooks of the retaining means and the hooks of the chains are oriented with the free ends thereof in mutual opposition.
Claim 4
Dependent Claim 49 words
A machine according to claim 2, in which the casting off means comprise means for pressing the weft yarns adjacent the points of engagement thereof by the hooks of the retaining means so as to urge the weft yarns out of engagement with the hooks of the retaining means.
Claim 5
Dependent Claim 63 words
A machine according to claim 3, in which each of said casting off means further includes a spring for holding the pressing means thereof out of engagement with the weft yarns and a solenoid operatively connected to the pressing means of each of the casting off means for moving the pressing means into engagement with the weft yarns upon actuation of the solenoid.
Claim 6
Dependent Claim 26 words
A machine according to claim 4, further comprising means for actuating the solenoid, a part of said actuating means being carried by the weft yarn layer.
Claim 7
Dependent Claim 79 words
A machine according to claim 5, in which the pressing means of each of the casting off means is mounted on a respective arm pivotally mounted for rotation in a plane transverse to the plane of the chains and the arm is so located relative to the weft yarn layer as to be engaged by the weft yarn layer at the ends of the traversal path of the weft yarn layer and thereby be pushed out of the way.

References Cited (Backward Citations)

US3523432A Cited
US3564872A Cited
US3665732A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-09-03 1977-03-05 1977-09-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-09-03 1981-03-05 1981-09-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-09-03 1985-03-05 1985-09-04 $7700.00 Window Closed / Lapsed

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