KR100327808B1 - Rolling Zipper Profiles and Sliders - Google Patents

Abstract

A retractable plastic fastener with a slider, particularly suitable for plastic bags and the like, having a structure located under the fastening element of the fastener and having an opening to close the fastening element of the fastener when engaged by the slider.

Description

Rolling action zipper profile and slider

US Patent Application No. 5007143 discloses a rolling actuated zipper profile with a slider. In this patent, the cross-sectional shape of the plastic zipper profile was such that it could be closed by first pressing the bottom together and then rolling the zipper to the upper closed position, the slider extending along the length of the zipper and the male and female elements to open the zipper. A separating finger is provided that engages a profile track parallel to the female and male elements. The separating fingers were configured to allow the element to be released at the open end of the slider to release the track and to engage the element at the closed end of the slider by joining the tracks.

FIELD OF THE INVENTION The present invention relates to a retractable plastic fastener having a slider, which is particularly suitable for plastic bags and the like, more specifically a rolling actuated zipper which is closed by first pressing the zipper together at the bottom and then rolling the zipper to the upper closed position. To a rolling action zipper profile.

1 is a bottom view of a plastic slider for opening and closing a retractable plastic fastener according to the present invention.

FIG. 2 is a cross-sectional view at the closed end of the slider taken along line 2-2 of FIG. 1, showing the slider assembled to the plastic zipper profile element of the retractable fastener according to the embodiment of the present invention in the closed position.

3 is a cross sectional view of the slider taken along line 3-3 of FIG. 1, showing the profile zipper element in a partially open position;

4 is a cross-sectional view of the slider taken along line 4-4 of FIG. 1, showing the profile zipper element in a more open position in the position shown in FIG.

5 is a cross-sectional view at the open end of the slider taken along line 5-5 of FIG. 1 showing the zipper profile element in the open position;

FIG. 6A shows a “normal” cross section of the zipper profile everywhere except where the narrow gap is located at the open end of the slider when the slider is placed stationary on a fully closed bag; FIG.

FIG. 6B shows a modified cross-section of a fully interlocked zipper profile where the narrow gap of the open end of the slider is located when the slider is placed stationary on a fully closed bag. FIG.

It is an object of the present invention to eliminate the need for a separating finger on the slider and also to eliminate the need for a track on the zipper to receive the separating finger.

The present invention relates to a retractable plastic fastener with a slider, which is particularly suitable for plastic bags and the like composed of a pair of flexible strips, the flexible strip having a male and female profile element extending along its length and retractably interlocking in each strip. A detachable fastener means is provided, wherein said strip comprises an elastic flange structure having protrusions suspended from said male and female elements and extending in parallel from said male and female elements. The male and female elements have a complementary cross-sectional shape to be closed by first pressing the bottoms of these elements together and then rolling those elements to the upper closed position. The strip is positioned with a two-legged slider to close or open the retractable fastener element, the slider having an inverted U-shaped plastic element with a back moving along the upper edge of the strip. The plastic element has sidewalls suspended from the back to cooperate with the retractable fastener element and extend from the open end to the closed end of the slider. The side wall has a larger gap at the open end than at the closed end. In addition, the slider is provided with a shoulder portion formed over the entire length of the slider and protruding inwardly from the suspended sidewall, wherein the shoulder portion is coupled with a flange structure suspended between the male and female profile elements and the projection to open and close the male and female profile elements that interlock and interlock. A rolling action to open and close occurs. The shoulder portion on the side wall has a larger gap at the closed end than at the open end of the slider.

In addition, according to the invention, the plastic is used with a slider having an inwardly protruding shoulder and suspended sidewalls and provided with ribs and groove profile elements retractably interlocking on each side of the back mouth. Provided with a rollable retractable plastic fastener that is particularly suitable for opening and closing the mouse of the bag, each profile element is provided with a suspended resilient flange with projections extending parallel to the rib and groove profile elements, the flanges and grooves It is engaged by a shoulder extending inward on the slider between the profile element and the protrusion. The rib and groove profile elements have a complementary cross-sectional shape to close by first pressing together the bottom of the element and then rolling the element to the upper closed position.

According to another feature of the invention, there is provided an opening method of opening a retractable plastic fastener using a slider, the fastener having a retractable rib and groove profile element, each profile element having a rib and a groove profile element. Suspended resilient flanges with projections extending parallel to the ribs are provided, the rib and groove elements having a complementary cross-sectional shape to be closed by first pressing the bottoms of these elements together and then rolling those elements to the upper closed position. On the profile element is located a slider with both legs apart, the slider having an inwardly projecting shoulder and a suspended sidewall extending from its open end to the closed end, the sidewall being larger at the open end than at the closed end. Having a gap, the inwardly projecting shoulder portion has a larger gap at the closed end than at the open end, the opening method being a movement to move the slider in the open direction so that the suspended elastic flange between the interlocking element and the contacting projection is bent and abutted. And simultaneously releasing the interlocking element to rotate outwardly about its bottom to be released.

1 shows a plastic slider 10. 2 to 5 show the profile of the retractable plastic fastener or zipper 11. The retractable fastener 11 is fixed to the upper edge or mouse portion of a thermoplastic bag (not shown) in any conventional manner. The slider 10 and the retractable fastener 11 may be made of the same plastic material as disclosed in US patent application 5007143.

As shown in FIGS. 2 to 5, the retractable fastener 11 has a pair of flexible strips 12, 13, which extend along its entire length and retractable in each strip. Detachable fastener means with interlocking male and female profile elements 15, 14 are provided. The strips 12, 13 comprise elastic flange structures 16, 17 with protrusions 18, 19 suspended from the male and female elements 15, 14 and extending in parallel from the male and female elements. The male and female elements 15, 14 have a complementary cross-sectional shape to close by first pressing the bottoms of these elements together and then rolling those elements to the upper closed position. This continuous action is well illustrated in FIGS. 5, 4, 3 and 2.

Slider 10 is positioned with both legs spanning strips 12 and 13 to close or open retractable fastener 11. The slider 10 has a substantially inverted U-shaped plastic member with a back 20 moving along the upper edges of the strips 12, 13, which plastic member is suspended from the back and is retractable fastener element. It has side walls 21 and 22 that cooperate with 14 and 15 and extend from the open end 10a of the slider to the closed end 10b.

The side walls 21 and 22 have a larger gap at the open end 10a than at the closed end 10b. In addition, the slider 10 is provided with shoulders 21a and 22a which are formed over the entire length of the slider and protrude inwardly from the suspended sidewalls 21 and 22, the shoulders being male and female profile elements 15 and 14. And a flange structure 16, 17 suspended between and projections 18, 19 to produce a rolling action of opening and closing the male and female profile elements interlocked and interlocked. The shoulders 21a and 22a on the side walls 21 and 22 have a larger gap at the closed end 10b than at the open end 10a of the slider 10. This can be clearly seen from FIGS. 1, 2 and 5.

2, when the profile elements 14, 15 are interlocked, it can be seen that the flanges 16, 17 suspended on the profile elements 14, 15 are spaced apart. The relatively rigid portions or projections 18, 19 of the flange converge and contact a short distance below the linkage portions of the profiles 14, 15. As can be seen from FIG. 5, the shoulders 21a and 22a of the slider 10 converge into a narrow passageway of the open end 10a of the slider. As the profile elements 14, 15 meet this portion of the slider 10, the flanges 16, 17 between the interlocked profile elements 14, 15 and the contact protrusions 18, 19 bend and abut, At the same time the interlocked profile elements are rotated outwards as shown in FIG. 5 and released. Since the projections 18, 19 are close to the interlocking profile elements 14, 15, no one can press the flanges together to open the zipper 11 without using the slider 10.

In order that the disengaged profile elements 14, 15 exit the slider's open end 10 a and are not accidentally re-engaged, the end 10 a of the slider 10 may be retracted if necessary. It may be formed to be slightly offset perpendicular to the other profile element 15. This is illustrated in FIGS. 4 and 5, whereby the slider 10 can cause the retracted profile elements 14, 15 to be gradually vertically offset. As shown in FIG. 5, the shoulder portion 22a is disposed below the shoulder portion 21a such that the profile element 14 is moved to the profile element 15 when the profiles 14, 15 are withdrawn from the slider 10. To be placed perpendicular to the. As a result, the elastic flanges 16, 17 are rebounded from one another immediately upon exiting the slider 10, such that the profile elements 14, 15 are not properly aligned to interlock again.

In addition, the flanges 16, 17 are deformed at the ends of the zippers 11 where the slider 10 is necessarily positioned when the bag is closed so that the slider 10 does not release the interlocking profile elements 14, 15. It is preferable that a facility be provided. FIG. 6A shows the zipper profiles 14, 15 everywhere except where the narrow gap is located at the open end 10a of the slider 10 when the slider 10 is placed stationary on a fully closed bag. The cross section of "normal" is shown. In this position, the suspended flanges 16 ', 17' are permanently deformed, for example by thermal means, adjacent to each other with profile elements 14, 15 fully interlocked as shown in Figure 6b. Is placed. Thereby, the narrow gap of the open end 10a of the slider 10 may cause the flange 16, 17 to be detached so that the interlocked profiles 14, 15 in this position when the zipper on the bag is fully closed. It has no effect.

While preferred embodiments of the invention have been described, it will be appreciated that further modifications may be made without departing from the scope of the invention as set forth in the appended claims.

Claims (8)

A rolling action retractable plastic fastener used with a slider consisting of a suspended sidewall and an inwardly projecting shoulder, which is particularly suitable for opening and closing the mouse of a plastic bag, The fasteners each have a retractable interlocking male and female profile element provided on each side of the bag's mouse, wherein each male and female profile element has a suspended elastic flange with protrusions extending parallel thereto. Interlocked by the slider between the profile element and the protrusion, the male and female profile elements having a complementary cross-sectional shape to be closed by first pressing together the bottom of these elements and then rolling the profile element to an upper closed position. Retractable plastic fasteners. 2. The retractable plastic fastener of claim 1 wherein the male and female profile elements each have a rib and a groove element. The retractable plastic as claimed in claim 1, wherein each male and female profile element forms a portion of a corresponding one of a pair of flexible plastic strips and extends along the strips. Fasteners. A retractable plastic fastener in combination with a slider to close or open the male and female profile elements, The fastener has the structure of claim 3 and the slider has an inverted U-shaped plastic member with a back moving along the upper edge of the strip, the plastic member being suspended from the back. A side wall is provided which cooperates with the retractable fastener and extends from the open end to the closed end of the slider, the side wall having a larger gap at the open end than at the closed end, the slider protruding inward from the suspended side wall. And a shoulder having a larger gap at the closed end than at the open end of the slider, the shoulder being formed over the entire length of the slider and engaging with the flange structure suspended between the male and female profile elements and the protrusion. I open and close the male and female profile elements to interlock in a retractable way A retractable plastic fastener in combination with a slider, characterized by generating a rolling action. 5. The method of claim 4, wherein the shoulder portion on the sidewall is displaced in a direction perpendicular to each other at the open end of the slider to provide a gradual vertical offset to the profile element when the profile elements are withdrawn from the slider. Retractable plastic fastener combined with a slider. 5. The device according to claim 4, wherein at the end of the retractable fastener at which the slider must be stationary when the bag is closed, the suspended flanges are permanently deformed to be positioned adjacent to each other with the profile elements fully engaged. And said open end of said slider does not affect separating said interlocked profile elements when said slider is moved to a fixedly disposed position. As an opening method of opening a retractable fastener using a slider, The fastener has a retractable rib and groove profile element, each profile element having a suspended elastic flange with a projection extending parallel to the rib and groove profile element, wherein the rib and groove profile element first comprises: Having a complementary cross-sectional shape for closing by pressing together the bottom of the profile element and then rolling the profile element to an upper closed position, the profile element being positioned with a slider with both legs apart, which is closed from its open end An inwardly projecting shoulder extending to the end and a suspended sidewall are provided, the sidewall having a larger gap at the open end than at the closed end, and the inwardly projecting shoulder having a larger gap at the closed end than at the open end. As a fastener opening method, A moving step of moving the slider in the open direction so that the suspended elastic flange between the interlocking element and the contact protrusion is bent and abuts, And at the same time a release step of releasing the interlocking element by rotating it outward about its bottom. 8. The method of claim 7, wherein the interlocking element is gradually vertically offset when it is released and exited from the slider.