Textiles: knitting – Needles – Sliding latch
Patent
1990-10-05
1993-06-08
Schroeder, Werner H.
Textiles: knitting
Needles
Sliding latch
66123, D04B 3506
Patent
active
052169014
DESCRIPTION:
BRIEF SUMMARY
Technical Field
The present invention relates to a compound needle for use in knitting machines for readily forming a loop wound around another loop.
BACKGROUND ART
Various proposals have heretofore been made for winding a loop around loop (see, for example, the specification of British Patent No. 329,098).
The British patent discloses a technique for forming a loop around another loop using a knitting needle which has a hook at the needle tip and a plurality of latches.
Theoretically, fabrics can be knitted with use of such needles.
In actuality, however, it was impossible to move the plurality of latches in the order disclosed in the specification of the British patent. Since it was conventionally impossible to control the movement of the plurality of latches, it was impossible to form a fabric wherein loops are provided around other loops.
Accordingly, no fabric is generally available commercially wherein one loop is wound around another loop.
On the other hand, compound needles are known which have a positively controllable latch (see, for example, the specification of U.S. Pat. No. 4,109,490).
The compound needle comprises a shank having a hook at its tip and a guide groove extending longitudinally thereof, and a plate slidably fitted in the guide groove. The hook can be opened or closed by the forward end of the plate by reciprocatingly moving the plate longitudinally thereof.
Nevertheless, a loop can not be drawn around another loop even with use of this compound needle.
To form one loop around another loop, two yarns must be engaged by a single needle at the same time, so that the single needle must be provided with a plurality of hooks or latches, and there arises a need to control the opening and closing of the hooks.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a compound needle for knitting machines which is capable of winding a loop around another loop.
In order to wind a loop around another loop, it is necessary to provide at least two yarn engaging portions (hooks) on a single needle and to control the opening and closing of the engaging portions.
According to the present invention, the engaging portions are controlled for opening and closing by a compound needle.
More specifically, the present invention provides a compound needle comprising a needle body having a hook, and a slider slidably fitted in the body, the hook being openable and closable by the body and the slider. The needle is characterized in that the slider has a recessed portion and a pivoted latch for opening and closing the recessed portion.
The above object can be fulfilled by the needle of the above construction. With usual knitting needles having a hook and a pivoted latch for opening and closing the hook, the opening and closing of the hook are controlled by the longitudinal movement of the needle.
With the compound needle, on the other hand, the opening and closing of the hook are controlled by controlling the movement of the needle body and the slider relative to each other.
With the needle of the present invention wherein the slider has a recessed portion and a pivoted latch for opening and closing the recessed portion, the opening and closing of the recessed portion can be controlled by controlling the movement of the slider, and the opening and closing of the hook can be controlled by controlling the movement of the slider and the needle body relative to each other, with the result that the hook and the recessed portion can be opened or closed as controlled at the same time by suitably controlling the needle body and the slider.
According to the present invention, therefore, yarns can be engaged with the hook and the recessed portion or disengaged therefrom as controlled. This makes it possible to wind a loop around another loop.
Further according to the present invention, the needle body has a shank, the above-mentioned hook formed at the tip of the shank, a protuberance formed in the vicinity of the hook, a butt formed at the rear end of the shank and a guide groove formed in
REFERENCES:
patent: 1441591 (1923-01-01), LaMontagne
patent: 1727769 (1929-09-01), Haveson
patent: 1877503 (1932-09-01), Gagne
patent: 1884090 (1932-10-01), Mills
patent: 1887166 (1932-11-01), Nuber
patent: 3229485 (1966-01-01), Peschl et al.
patent: 3828582 (1974-08-01), Widdowson et al.
patent: 4109490 (1978-08-01), Bosch
patent: 4127013 (1978-11-01), Nuber
patent: 4196600 (1980-04-01), Kohl
Calvert John J.
Gunze Kabushiki Kaisha
Schroeder Werner H.
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