Abstract: A combined zipper top stop and pull tab safety protection structure includes a left top stop located on a top end of a left zipper tape, a right top stop located on a top end of a right zipper tape, a zipper slider used to close/open the left and right zipper tapes, and a pull tab coupled to the zipper slider, a pin hole located on one of the left and right top stops, a mating pin located on the other of the left and right top stops for engagement with the pin hole, an engagement block located on a top side of one of the left and right top stops, and an engagement hole located on the pull tab for engagement with the engagement block after engagement between the pin hole and the mating pin. The invention relates also to a method of using the combined zipper top stop and pull tab safety protection structure.

Abstract: A double open end zipper for both end positioning-based luggage includes first and second housing members respectively equipped with an N-shaped plastic strip at the rim thereof, and a double open end zipper including first and second zipper tapes respectively stitched to the N-shaped plastic strips at the first and second housing members in reversed directions with the box and pin of the first zipper tape respectively disposed adjacent to the pin and box of the second zipper tape subject to the guidance of a mark line at each N-shaped plastic strip, a seam allowance constraint block located at an outer rear side of the box of each of the first and second zipper tapes, two zipper sliders respectively coupled to first and second zipper tapes, allowing adjustment of the combined storage capacity defined in between the first and second housing members.

Abstract: A wide top narrow bottom type double-layer zipper that the width of the interlocked bottom interlocking coils is smaller than the width of the interlocked top interlocking coils; the top interlocking coils and the bottom interlocking coils have the same spiral pitch; the top and bottom layers of the wide top narrow bottom type double-layer zipper are vertically aligned and sewed; the diameter of the polyester coils extend spirally around the respective filler cords of the respective bottom interlocking coils monofilament is about 0.02 mm˜0.1 mm smaller than the diameter of the polyester coils monofilament that extend spirally around the respective filler cords of the respective top interlocking coils; the engaged tooth line of the top interlocking coils at the top cover panel of the zipper slider and the engaged tooth line of the bottom interlocking coils at the bottom cover panel of the zipper slider exhibit a non-superimposed relationship.

Abstract: A zipper slide so configured that the retracted design of the rear side of the bottom slide body block relative to the top slide body block provides sufficient space for allowing the inner layer of the double-layer nylon zipper to be smoothly curved when the zipper slide is cornering, reducing zipper friction resistance and prolonging the zipper lifespan; the upper guard flanges are relatively longer than the lower guard flanges so that the upper guard flanges are kept relatively closer to the center block than the lower guard flanges to shift the fulcrum forward, enabling each of integrated opposing left and right series of interlocking teeth of the double-layer nylon zipper to face toward the fulcrum and the center block when each of integrated opposing left and right series of interlocking teeth of the double-layer nylon zipper is opened to the extent.

Abstract: A double-layer open-end zipper and double-layer 3-in-one open-end zipper and the related fabrication method is disclosed. The double-layer open-end zipper are made by performing a coil spiral and broad-width fabric tape stitching step, a dyeing and drying set, a gapping size setting step, a splitting, folding and calibration step and a glue heating and bonding or stitching step to form a single-sided double-layer zipper chain tape, and then performing a zipper slide coupling step, a ultrasonic patch sealing and T cut hole punching step, a box with small guider and pins with groove fixation step, a zipper slide functioning checking step and a top stop fixation step to obtain the desired finished double-layer open-end zipper.

Abstract: A roller-loaded zipper slide includes first and second roller brackets respectively mounted in top and bottom slide body blocks of the slide body thereof to carry a respective front roller in flush with the front edges of the top and bottom slide body blocks and in proximity to the zipper's interlocking teeth and in direct contact with the zipper tapes for guiding the interlocking teeth into the internal chamber of the roller-loaded zipper slide smoothly and accurately, avoiding scratching or damaging the stitches of the zipper tapes, improving zipper slide sliding mobility, reducing zipper teeth wear and prolonging zipper slide lifespan.

Abstract: A roller-loaded zipper slide includes first and second roller brackets respectively mounted in top and bottom slide body blocks of the slide body thereof to carry a respective front roller in flush with the front edges of the top and bottom slide body blocks and in proximity to the zipper's interlocking teeth and in direct contact with the zipper tapes for guiding the interlocking teeth into the internal chamber of the roller-loaded zipper slide smoothly and accurately, avoiding scratching or damaging the stitches of the zipper tapes, improving zipper slide sliding mobility, reducing zipper teeth wear and prolonging zipper slide lifespan.