Sewing – Elements – Frames
Patent
1992-02-27
1994-08-02
Nerbun, Peter
Sewing
Elements
Frames
112104, 112147, D05B 3500, D05B 3900
Patent
active
053335635
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a sewing method and apparatus usable for making box pockets or pipings in sewing work.
BACKGROUND ART
Conventionally various kinds of sewing methods and means have been proposed for stitching the box pockets or pipings. For example, Japanese Utility Model Kokai No. 56-9383 discloses a stitched product manufactured such that a patch cloth and a core material are retained being superimposed on a base cloth material, ends of the respective superimposed base cloth material, patch cloth and core material are stitched together to form a seam line, the patch cloth and the core material are folded along the seam line over to the opposite side of the seam line, the free end of the patch cloth is folded to the rear side of the patch cloth so as to enclose the core material, and the patch cloth thus superimposed with the rear side thereof is stitched with the patch cloth in parallel with said seam line.
Similarly, Japanese Utility Model Kokai No. 55-101580 discloses means in which a patch cloth is press supported by movable holding means upon a base cloth material placed on a sewing machine table, the base cloth/material and the patch cloth are stitched in parallel keeping a space by using two sewing needles while moving the movable holding means in a fabric feeding direction, and the base cloth material and the patch cloth between two seam lines are cut to provide a piped stitching.
As an example that teaches the similar means there can be mentioned Japanese U.M. Kokai No. 57-140268.
However, according to the piping stitching or box pocket stitching so far proposed the piping portion and its neighboring face portion of base cloth material usually vary in the number of superimposing sheets of the cloths or the like, and therefore stepped folds are created between the piping portion and its neighboring face cloth portion. Excepting a specific case such stepped folds in the piping portion have been shunned because of poor quality or undesirable finishing around a pocket. On the other hand, the piping portion with such stepped folds is likely to create a flap or creases while wearing the garment thereby presenting a problem of lowering the valuation of a suit itself.
It is therefore a first object of the present invention to overcome such a problem which occurs in stitching pipings or box pockets and to provide an improved sewing method where the piping portion and its neighboring face cloth portion are finished flat.
A second object of the present invention is to provide an apparatus for carrying out said sewing method.
DISCLOSURE OF THE INVENTION
To achieve the first object, according to a first aspect of the present invention there is provided a sewing method characterized in that a patch cloth is pressed against a base cloth material, the patch cloth and the base cloth material are stitched along one edge portion of the patch cloth to form a first seam line while keeping a space approximately equal to the width of a piping to be formed away from the one edge portion of the patch cloth, said one edge portion of the patch cloth is folded toward the other edge portion thereof based on the first seam line as a folding axis, which is formed by said stitching, the other edge portion of the patch cloth is folded over said one edge portion thereof along said one edge portion of the folded patch cloth, the other edge portion of the folded patch cloth and the base cloth material are stitched together in parallel along said first seam line at a region close to the first seam line to allow a second seam line to be formed, and the portion of the base cloth material, which is positioned in the opposite side of the second seam line to the first seam line, is folded crossing over the second seam line along the first seam line whereby the base cloth material and the patch cloth are triply superimposed at both the sides of said first and second seam lines.
Further, according to a second aspect of the invention there is provided a sewing method characterized in that two sheets of
REFERENCES:
patent: 2176643 (1939-10-01), Sigoda
patent: 3277853 (1966-10-01), Tucci
patent: 4463697 (1984-08-01), Vogt et al.
patent: 5092258 (1992-03-01), Goldbeck et al.
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