subject: Sewing Needle Structure For Stitching A Hidden Nylon Zipper [print this page] The present invention discloses a sewing needle structure for stitching a hidden nylon zipper, more particularly relates to a sewing needle structure applicable for the hidden nylon zippers of size No. 5 or above, characterized in that the sewing needle structure has at least three needles, which are parallel to each other.
Those parallel needles are arranged with a gap having the smallest length within the maximum range and being evenly distributed along the interlocking teeth. The sewing needle structure having at least three needles fixes each seam between the interdigitating teeth, and the distance between the interlocking can be set to a minimum, such that the positioning of each tooth onto the tape by splicing could be more secure and reliable. Furthermore, the turnover folded edges of the two zipper tapes can be directly interlocked and securely coupled, and thereby the nylon zipper attains the hidden effect with high artistic quality.
A sewing needle apparatus for stitching to a tape material in hidden manner a nylon zipper having a plurality of teeth each defining a stitching space of a standard predetermined tooth body width, said sewing needle apparatus comprising at least three needle portions disposed in substantially parallel and equidistantly spaced manner, said needle portions being configured to concurrently insert into the stitching space of one zipper tooth.
The sewing needle apparatus as recited in claim 1 wherein said needle portions are configured to concurrently insert into the stitching space of a zipper tooth defining a standard tooth body width of approximately 2.52 mm.
The primary objective of the present invention is to provide a sewing needle structure for stitching a hidden nylon zipper, wherein the sewing needle structure has at least three needles, which are parallel to each other. Those parallel needles are arranged with a gap having a minimum length within the maximum range evenly distributed along the interlocking teeth. The sewing needle structure having at least three needles fixes each seam between the interdigitating teeth, and the distance between the interlocking can be set to a minimum, such that the positioning of each tooth onto the tape by splicing could be more secure and reliable. Furthermore, the turnover folded edge of the two zipper tapes can be directly interlocked and definitely sealed, and thereby the nylon zipper attains the hidden effect with high artistic quality.
To make it easier for our examiner to understand the objective of the invention, its structure, innovative features, and its performance, we use a preferred embodiment together with the attached drawings for the detailed description of the invention.
Since the hidden zipper of the present invention and the traditional zipper mainly differ in whether or not the cloth tape can implement the folding movement after the sewing stitches of the interdigitated teeth are fixed to the cloth tape. The way of implementing the stitches, sewing needles, and the interdigitated teeth are the same. After the interdigitated teeth of a hidden zipper are fixed to the cloth tape, such cloth tape still needs to perform the turn-over folding so that when pulling the slider along the stitches to interdigitate the teeth between two cloth tapes, the interdigitated teeth can be hidden completely by the cloth tape without having exposure of any part of it. Further, after the interdigitated teeth of a traditional zipper, which is not a hidden zipper, are fixed to the cloth tape, such cloth tape needs not to perform the turnover folding so that when pulling the slider along the stitches to interdigitate the teeth between two cloth tapes, the interdigitated teeth will expose. As we can see that the operation of a hidden zipper and that of a traditional zipper are exactly the same. In the completely same way of operation, the present invention is also applicable for the operation of the tradition zipper of size No. 5 or above,
Therefore in summation of the above description, the present invention herein improves the conventional structure. It further complies with the patent application requirements and is submitted to the Patent and Trademark Office for review and granting of the commensurate patent rights.
While the nylon zipper invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
