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US4052865A Expired / Lapsed US ⏱️ 0.0 years remaining

Thread-guiding mechanism for flat-bed knitting machine

Assignee: Individual
•
Filing: 1976-04-29
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Granted: 1977-10-11
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Expires: 1996-04-29
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Abstract

Abstract In order to produce an inlay-type pattern on a flat-bed knitting machine, a plurality of thread guides carrying differently colored threads are mounted on respective slides which are movably supported, in pairs, on horizontal guide bars above a needle bed. Each slide coacts with a pair of adjustable stops limiting its reciprocation along the guide bar, another slide taking over the thread feed at the point where a previously active slide is arrested. In order to prevent the thread of the first slide from being engaged by the needles simultaneously with the thread of the second slide, the thread guide of the first slide is swung back from a leading to a trailing position upon reaching the end of its run in one or the other direction; this repositioning of the thread guide is accomplished by a pair of feelers contacting the associated stops. The position of each stop can be changed with the aid of a rack, slidable along the corresponding guide bar, which can be displaced after each machine cycle by a limited number of needle positions according to the pattern to be knitted.

Inventors

  • 👤 Gino Zamarco

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 20:06
CPC Classifications
D; D04; D04B; D04B7/00; D04B7/24; D04B7/26; D04B15/00; D04B15/38; D04B15/54; D04B15/56

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 259 words
In a knitting machine provided with a flat needle bed carrying a multiplicity of knitting needles, feed means for supplying thread to said needles, and reciprocating drive means for successively displacing an active group of said needles to draw the supplied thread into a row of loops during each machine cycle, the improvement wherein said feed means comprises: a plurality of slides each provided with a thread guide; support means enabling the displacement of said slides adjacent one another across said needle bed with entrainment of respective threads past said needles, each thread guide being movable on its slide between two positions relatively offset in the direction of slide displacement; a pair of end stops for each slide; transport means coupled with said drive means for entraining each slide during a machine cycle along a path limited by said end stops to extend over only a fraction of said row of loops, with presentation of the corresponding thread to less than all the needles of said group, the distances traveled by said slides complementing one another with limited overlap whereby said row of loops is formed from a succession of different threads; and switchover means on each slide controlled by the associated end stops for moving the thread guide thereof from one of said positions, advanced in the direction of slide displacement, to the other of said positions at the end of its path, with resulting removal of the corresponding thread from the reach of needles engaging the thread of another slide starting on a continuation of said path.
Claim 2
Dependent Claim 259 words
In a knitting machine provided with a flat needle bed carrying a multiplicity of knitting needles, feed means for supplying thread to said needles, and reciprocating drive means for successively displacing an active group of said needles to draw the supplied thread into a row of loops during each machine cycle, the improvement wherein said feed means comprises: a plurality of slides each provided with a thread guide; support means enabling the displacement of said slides adjacent one another across said needle bed with entrainment of respective threads past said needles, each thread guide being movable on its slide between two positions relatively offset in the direction of slide displacement; a pair of end stops for each slide; transport means coupled with said drive means for entraining each slide during a machine cycle along a path limited by said end stops to extend over only a fraction of said row of loops, with presentation of the corresponding thread to less than all the needles of said group, the distances traveled by said slides complementing one another with limited overlap whereby said row of loops is formed from a succession of different threads; and switchover means on each slide controlled by the associated end stops for moving the thread guide thereof from one of said positions, advanced in the direction of slide displacement, to the other of said positions at the end of its path, with resulting removal of the corresponding thread from the reach of needles engaging the thread of another slide starting on a continuation of said path.
Claim 3
Dependent Claim 36 words
The improvement defined in claim 1 wherein said switchover means comprises a pair of oppositely extending feelers on each slide coupled with the thread guide thereof, said feelers being respectively engageable with the associated end stops.
Claim 4
Dependent Claim 39 words
The improvement defined in claim 1 wherein each thread guide is pivotally mounted on the associated slide for swinging about a line perpendicular to the direction of slide displacement, said positions lying symmetrically on opposite sides of said line.
Claim 5
Dependent Claim 26 words
The improvement defined in claim 3 wherein each slide is provided with indexing means for releasably arresting the associated thread guide in either of said positions.
Claim 6
Dependent Claim 58 words
The improvement defined in claim 4 wherein said indexing means includes a spring-loaded arm and a lever pivoted to the slide, said arm and said lever being provided with coacting formations, the thread guide being fulcrumed on a free end of said arm, said lever being positively connected with said feelers and articulatedly linked with the thread guide.
Claim 7
Dependent Claim 47 words
The improvement defined in claim 3 wherein said transport means comprises a reciprocable carriage common to all slides, each slide being provided with a pair of shoulders spaced apart in the direction of displacement and engageable by a projection on the carriage for entrainment in opposite directions.
Claim 8
Dependent Claim 24 words
The improvement defined in claim 1 wherein said end stops are adjustably mounted on said support means for selective displacement after any machine cycle.
Claim 9
Dependent Claim 57 words
The improvement defined in claim 7 wherein said support means comprises a plurality of horizontal bars each forming tracks for a pair of said slides on opposite sides thereof, each bar being provided with at least two independently movable control members linked with the end stops mounted thereon for changing the path limits of the associated slides.
Claim 10
Dependent Claim 23 words
The improvement defined in claim 8 wherein the control members of end stops associated with consecutively displaceable slides are interconnected for joint adjustment.
Claim 11
Dependent Claim 27 words
The improvement defined in claim 1 wherein one end stop of each pair is provided with an eye for feeding the thread to the associated thread guide.

References Cited (Backward Citations)

US2286227A Cited
US2644323A Cited
US2670619A Cited
US2602312A Cited
GB878691A Cited
US3688525A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-10-10 1981-04-11 1981-10-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-10-10 1985-04-11 1985-10-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-10-10 1989-04-11 1989-10-11 $7700.00 Window Closed / Lapsed

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