Abstract: A coupling structure of retractable handle-equipped luggage includes a luggage housing comprising an upper housing member and a lower housing member equipped with a retractable handle, a double open end zipper including a second zipper tape stitched to the rim of the upper housing member, a first zipper tape stitched to the rim of the lower housing member, a box affixed to each of two opposite ends of the first zipper tape, a pin affixed to each of two opposite end of the second zipper tape and two zipper sliders mounted to the first zipper tape and respectively provided with a pull tap that is fastenable to a customs lock at the lower housing member, two detachable flexible buckles stitched to the upper and lower housing members, and a detachable hinge mounted to the upper housing member and the lower housing member between the two detachable flexible buckles.

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 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 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 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 thick pad-integrated double-layer nylon zipper or single-layer nylon reverse zipper and luggage mounting arrangement includes a lining of a hardside luggage, a zipper including two zipper tapes and a zipper slider slidable to close/open the zipper tapes, and two N bars respectively fixedly fastened with the lining and the zipper tapes together. Each N bar has an upper layer, a lower layer, and a thick pad element integrated intermediate layer connected between the upper layer and the lower layer and fastened with the respective zipper tape to the lining by stitches to define a vertical gap in the luggage below the zipper tapes for the passing of the lower half of the zipper slider when the zipper slider is moved to open or close the zipper.

Abstract: A waterproof, airtight, anti-slit, high transverse tensile strength double-layer zipper made by: stitching a continuous polyester chain to a middle part of a broad-width fabric tape and then separating the continuous polyester chain into left and right series of interlocking teeth after zipper chain tape dyeing and drying and gluing processes, and then folding up the zipper chain tape and stitching up the open side of the folded zipper chain tape so as to obtain a single-sided double-layer zipper chain tape, and then using a zipper slider to couple two single-sided double-layer zipper chain tapes, thereby obtaining a waterproof, airtight, anti-slit, high transverse tensile strength double-layer zipper. Alternatively, the continuous polyester chain can be stitched to the broad-width fabric tape near its one lateral side for making a high-strength double-layer zipper with less fabric consumption.

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 waterproof, airtight, anti-slit, high transverse tensile strength double-layer zipper made by: stitching a continuous polyester chain to a middle part of a broad-width fabric tape and then separating the continuous polyester chain into left and right series of interlocking teeth after zipper chain tape dyeing and drying and gluing processes, and then folding up the zipper chain tape and stitching up the open side of the folded zipper chain tape so as to obtain a single-sided double-layer zipper chain tape, and then using a zipper slider to couple two single-sided double-layer zipper chain tapes, thereby obtaining a waterproof, airtight, anti-slit, high transverse tensile strength double-layer zipper. Alternatively, the continuous polyester chain can be stitched to the broad-width fabric tape near its one lateral side for making a high-strength double-layer zipper with less fabric consumption.

Abstract: A double sided nylon sandwich mesh fabric zipper and slider assembly includes coil strips being left handed and right handed plastic coils each having a center cord and a series of interlocking teeth, each tooth having a tooth head and a tooth body so configured that the tooth heads are respectively interlockable with the tooth heads of the teeth of the coil strips at the other zipper tape. The slider has C-shaped guide grooves to guide locking and unlocking positions horizontal movement of the teeth of the upper and lower coil strips, and a balance guide block configured to match with the configuration of the tooth heads, facilitating accurate alignment between the left and right teeth of the upper and lower coil strips and assuring smooth engagement and disengagement of the interlocking teeth.

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 double layer zipper includes two zipper tapes, each zipper tape having a seal strip covered on transverse top and bottom edges and one longitudinal side edge thereof and stitched with the associating interlocking series of teeth, and an interlocking series of teeth formed of a series of coils and respectively fastened to each of opposing top and bottom sides of each of the zipper tapes, each coil having a coil head and a coil body connected to the front side of the coil head, the coil body having a recessed face disposed adjacent to the associating coil head, two flank portions disposed at two opposite lateral sides of the recessed face and a neck connected between the recessed face and associating coil head so that each coil has a tadpole-shaped profile.

Abstract: A double sided nylon sandwich mesh fabric zipper and slider assembly includes coil strips being left handed and right handed plastic coils each having a center cord and a series of interlocking teeth, each tooth having a tooth head and a tooth body so configured that the tooth heads are respectively interlockable with the tooth heads of the teeth of the coil strips at the other zipper tape. The slider has C-shaped guide grooves to guide locking and unlocking positions horizontal movement of the teeth of the upper and lower coil strips, and a balance guide block configured to match with the configuration of the tooth heads, facilitating accurate alignment between the left and right teeth of the upper and lower coil strips and assuring smooth engagement and disengagement of the interlocking teeth.

Abstract: A roller zipper slide includes a slide body having a longitudinal slot on a top slide body block in communication with an internal chamber thereof and two coupling grooves located at two opposite lateral sides of the longitudinal slot. The roller zipper slide further includes a roller pivotally having two pivot pins respectively pivotally coupled to the coupling grooves and a bottom side thereof projecting into the internal chamber of the slide body right above the engaging position between the left and right series of teen of the zip fastener, thereby improving sliding mobility, reducing zipper teeth wear and prolonging zipper slide lifespan.

Abstract: A double layer zipper includes two zipper tapes, each zipper tape having a seal strip covered on transverse top and bottom edges and one longitudinal side edge thereof and stitched with the associating interlocking series of teeth, and an interlocking series of teeth formed of a series of coils and respectively fastened to each of opposing top and bottom sides of each of the zipper tapes, each coil having a coil head and a coil body connected to the front side of the coil head, the coil body having a recessed face disposed adjacent to the associating coil head, two flank portions disposed at two opposite lateral sides of the recessed face and a neck connected between the recessed face and associating coil head so that each coil has a tadpole-shaped profile.