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Underneedle selection device

A technology of equipment and bottom needles, used in knitting, weft knitting, textiles and papermaking, etc., can solve the problems of expensive, difficult to choose, easy to wear and so on

Inactive Publication Date: 2010-12-01
SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0037] In addition, after various polarization cycles, the bottom pin may also partially remain polarized and thus become magnetized, making it harder to select
Therefore, the material used for the bottom needle must have magnetically permeable properties, making it more expensive than general-purpose bottom needles - made of properly treated steel to withstand wear and mechanical stress - and more expensive

Method used

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  • Underneedle selection device
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Examples

Experimental program
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Embodiment Construction

[0051] For purposes of simplicity of description, the following description refers only to circular knitting machines. However, it is clear that the proposed underneedle selection device can be equally used and also advantageously applied to linear machines in which the non-cylindrical needles and underneedle supports are devices called needle beds.

[0052] Referring to the drawings, reference numeral 1 schematically denotes a cylinder of a circular knitting machine. The cylinder 1 carries, along the circumference, a plurality of needles, not shown, each under which an underpin 2 is arranged, in a manner housed in special grooves 1' parallel to the cylinder alignment. Each underneedle is provided with a tooth or heel 4 protruding from the cylindrical groove to be engaged by an underneedle selection device generally indicated by reference numeral 10 and which is the subject of the present invention.

[0053] The selection device 10 comprises a plurality of selection tips...

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PUM

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Abstract

The invention relates to a device (10) for selecting underneedles (2) of a knitting machine comprising a plurality of selection tips (20) suitable to be activated by actuating means ' (30), for example piezoelectric sheets, in such a way to be displaced between a non- operating position and a working position, wherein they are in the range of action of the underneedle heels (4). In this interference position, the heels (4) push the tips (20) against an abutment means (22) acting as support and are thus forced by the movement of the machine itself to follow the tip profile so as to be raised or compressed. The movement to be performed by the selection tips (20) is therefore minimised, the mechanical movement work of the raising or lowering underneedle (2) being produced by the needle holder device itself.

Description

technical field [0001] The object of the invention is a bottom needle selection device for a knitting machine. Background technique [0002] Within the range of these machines, more and more intricate designs were to be made on jersey, thus requiring the weaving of large numbers of yarns of different colours. [0003] As is known, in knitting machines the yarn is processed by a plurality of needles arranged in relative grooves of a cylinder (in the case of a circular machine) or a needle bed (in the case of a linear machine). In order to obtain a specific treatment, such as designing in multiple colors, or to obtain a specific weaving effect, the needles involved in the work are selected mechanically by means of corresponding bottom needles, also called levers (Jacks), The bottom needle is provided with teeth, also called a heel. [0004] A properly chosen bottom needle allows the relative needle to travel up to a well-defined position in the machine where it will hook the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04B15/78
CPCD04B15/78
Inventor 佛朗哥·卡利亚里
Owner SYST INC