Sewing – Special machines – Quilting
Reexamination Certificate
2000-03-16
2001-05-01
Izaguirre, Ismael (Department: 3741)
Sewing
Special machines
Quilting
Reexamination Certificate
active
06223666
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a quilting machine with variable-spacing stitchers.
It is known that a quilting machine comprises a cloth supporting carriage and a plurality of stitchers which quilt the cloth according to a preset pattern.
In quilting machines, the cloth supporting carriage and the stitchers perform relative movements which allow the sewing needle to move on the cloth with two degrees of freedom in order to form a line of stitches that follows the intended path.
In quilting machines, the stitchers are mounted on a frame which comprises a first beam which lies above the cloth and a second beam which is parallel to the first beam and lies below the cloth.
The first beam supports a guide for the sewing head of the stitcher, while the second beam supports a guide for the so-called hook assembly.
In order to allow the sewing needle to act in cooperation with the hook assembly, mechanical transmissions and/or electrical connections are provided so that the sewing needle moves in step, and in perfect vertical alignment, with the hook assembly during its movements over the cloth.
Conventional quilting machines have operating limitations when it is necessary to manage a plurality of stitchers operating independently of each other so that each one follows an individual path. Because of these difficulties, the stitchers are mostly rigidly connected to each other and can follow only parallel paths.
SUMMARY OF THE INVENTION
The aim of the present invention is therefore to provide a quilting machine without suffering the conventional drawbacks, i.e., which comprises a plurality of stitchers which can be actuated so that they operate independently of each other in order to trace converging and diverging lines of stitches.
This aim is achieved by a quilting machine which comprises a frame composed of a first beam arranged horizontally above a cloth to be quilted and a second beam arranged below said cloth, said beams being provided with respective guides for carriages for supporting a sewing head and, respectively, a hook assembly of at least two stitchers, one of which being provided with means for moving the sewing head and the hook assembly synchronously and along the same path and with the same orientation, characterized in that the carriages that support the sewing head and the hook assembly of a first stitcher support respective motor elements for a synchronous movement of the carriages that support the sewing head and the hook assembly of the second stitcher.
REFERENCES:
patent: 3749037 (1973-07-01), Cash
patent: 5103747 (1992-04-01), Resta et al.
patent: 5287820 (1994-02-01), Stutznaecker et al.
patent: 5832849 (1998-11-01), Kaetterhenry et al.
patent: 0 931 867 (1999-07-01), None
patent: 2 089 849 (1982-06-01), None
Izaguirre Ismael
Josif Albert
Modiano Guido
O'Byrne Daniel
RESTA S.r.l.
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