Sewing – Special machines – Embroidering
Patent
1991-05-23
1992-10-27
Schroeder, Werner H.
Sewing
Special machines
Embroidering
D05C 1512
Patent
active
051580284
DESCRIPTION:
BRIEF SUMMARY
SPECIFICATION
The invention relates to a module with tufting tools, in particular needles, in which the tufting tools are cast in a basic body, the length of which is equal to a multiple of the mean distance between the tufting tools cast into the basic body, which is provided on its rear face, which can be attached to a bar, with a bearing ridge and recesses and on its front face with a receiving shoulder and projections, and which has an elongated hole traversing the length of the module from the rear face to the front face.
Such a module for a tufting machine is known from DE-PS 2 828 278. In this case, the modules can be screwed on to a needle bar. Each basic body has two conical recesses arranged spaced lengthwise along the module on the rear face facing the needle bar. Correspondingly, two projections also arranged with a space between them are provided on the front face of the basic body. The recesses and the projections are dimensioned in such a way that the projection of one module can engage in the recesses of another when the two modules arranged nest to one another are offset against one another by half a needle division.
With the known module it is thus possible to create two rows of needles by forming two corresponding rows of modules, whereby the needles of one row are offset by half a division against those of the other.
During tufting operations a large number of deviating divisions of the tufting tools are used. In the case of the known module this leads to a separate basic body having to be produced for each division, in which the projection of the front face are to be arranged offset relative to the recesses of the rear face in accordance with the specific desired division.
The task of the present invention consists in avoiding this disadvantages of the known module. In particular, the invention aims to achieve a reduction in the number of necessary basic bodies which have to be designed differently without losing any of the precision of the modules to be joined together.
This task is solved in accordance with the invention by a module of the kind described at the beginning in that the recesses on the rear face are formed by the spaces between a countersunk row of teeth which are identical and equidistant from each other and have straight flanks, that the projections on the front side are formed by a projecting row of teeth, and that the teeth and the spaces between the teeth of the projecting row of teeth match the spaces and the teeth, respectively, of the countersunk row of teeth.
The countersunk row of teeth allows easy arrangement of the rear face of the module against a bar, e.g. a needle bar. The teeth of the projecting row of teeth on the front face of a module can easily be introduced into the spaces in the countersunk row of teeth of another module. Alignment takes place automatically in a lengthwise direction. It is possible to offset the connection between two such engaging modules by one further or several further teeth. Consequently, this makes it possible to modify the relative position of the tufting tools of adjacent rows in two or more stages.
The module in accordance with the invention can further be designed in such a way that the distance from center to center of the tufting tools represents the n-fold of the distance between the teeth, whereby n is a whole number > 1.
The module in accordance with the invention can further be designed in such a way that the spaces between the teeth of the countersunk row of teeth are offset against the teeth of the projecting row of teeth, whereby this offset measure is 1
of the distance from centre to centre of the tufting tools and n is a whole number >1.
The module in accordance with the invention can further be designed in such a way that the division of the projecting row of teeth and the countersunk row of teeth is 5/64, 1/20 or 1/16 inch.
It is thus possible to form the countersunk row of teeth and the projecting row of teeth of the basic body with a division of 5/64 inch. The mould necessary for this basic body can
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patent: 4429648 (1984-02-01), Slattery
patent: 4489475 (1984-12-01), Struttman et al.
patent: 4574716 (1986-03-01), Czelusniak, Jr.
patent: 4637329 (1987-01-01), Czelusniak, Jr.
Jos. Zimmermann GmbH & Co. KG
Lewis Paul C.
Schroeder Werner H.
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