US 3906594 A
Top stops for use in a slide fastener of the type having a continuous coupling element of synthetic resin material arranged longitudinally on one surface of each stringer tape. The top stops, which also are made of nylon or like synthetic resin, are fused to the respective stringer tapes at the upper extremities of the continuous coupling elements, in such a manner that a stop portion and a guide portion are unitarily molded on each top stop. The stop portions serve to limit the movement of the slider in the fastener closing direction, whereas the guide portions function to guide the slider into correct abutting contact with the stop portions. The stop portion and the guide portion of each top stop are united integral with several of the connective portions, disposed away from the coupling heads, of each continuous coupling element.
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Description (OCR text may contain errors)
United States Patent Takahashi et al.
[ Sept. 23, 1975 TOP STOPS FOR SLIDE FASTENERS 75 Inventors: Kihei Takahashi, Uozu; Shunji (flak Akashi Kurobe, both of Japan Attorney, Agent, or F1rmBucknam and Archer  Assignee: Yoshida Kogyo Kabushiki Kaisha,
Tokyo Japan  ABSTRACT  Filed: Dec. 27, 1974 Top stops for use in a slide fastener of the type having a continuous coupling element of synthetic resin mate- [zl] Appl 536827 rial arranged longitudinally on one surface of each stringer tape. The top steps. which also are made of  Foreign Application Priority Data nylon or like synthetic resin. are fused to the respec- Dee. 29 1973 Japan 49 3l67[U] tive stringer tapes at the upper extremities of the continuous coupling elements, in such a manner that a 52 US. Cl. 24/205.11 F Stop Portion and guide Pomn are unitarily molded 51 Int. Cl A44b 19/36 On each P stop- The Stop portions serve to limit the  Field of Search 24/205.11 F, 205.11 R movement of the slider in the fastener Closing direction, whereas the guide portions function to guide the  References Cited slider into correct abutting contact with the stop por- UNITED- STATES PATENTS tions. The stop portion and the guide portion of each 2 3 5 05 7/1943 C H 24/205 [1 R top stop are united integral with several of the connecat tive portions, disposed away from the coupling heads, 3,482,292 l2/1969 Frohlich 24/205.ll F of each Continuous p g clement FOREIGN PATENTS OR APPLICATIONS 1,204,745 9/1970 United Kingdom 24/20511 F 2 Clams 3 D'awmg F'gures V r 7 28\ 91k 28a 2L 27 22 22 30 30 i 2 Why/ l 1 7\"\ 1 TOP STOPS FOR SLIDE FASTENERS BACKGROUND OF THE INVENTION This invention relates generally to slide fasteners and more specifically to a cooperative pair of top stops for arresting the movement of a slider in a fastener closing direction on a pair of fastener stringers. Even more specifically, the invention is directed to top stops for use in a slide fastener of the type having a continuous coupling element which is made of an elongate synthetic resin filament and which is stitched or otherwise secured longitudinally to one surface of each stringer tape.
According to an example of known top stops for slide fasteners, the endmost fastener element on each stringer tape is fused and deformed into such shape as to arrest the movement of the slider. It is also known to fuse film-like piecesof thermoplastic material onto the respective stringer tapes. generally in V-shaped arrangement. These prior art top stops are mostly not of sufficient strength to resist the thrust of the slider that acts repeatedly thereon in the use of the slide fastener. Such top stops are therefore relatively easy to be bro ken or otherwise rendered inoperable or are not so endurable as they are required to be.
SUMMARY OF THE INVENTION It is, therefore. an object of this invention to provide improved top stops which are so constructed and arranged as to well withstand the thrust of the slider acting thereon throughout the prolonged period of use of the slide fastener.
Another object of the invention is to provide top stops so constructed and arranged that the slider can be positively guided to its predetermined topmost position on the pair of fastener stringers.
The top stops according to the invention are intended for use in a slide fastener of the type having a continuous coupling element which is made of a synthetic resin filament and which is arranged on one surface of each stringer tape along its longitudinal edge lying adjacent the other tape. The continuous coupling element is so shaped as to provide a longitudinal row of coupling heads adapted to engage between the similar coupling heads of the complementary coupling element. and a longitudinal row of connective portions remote from the coupling heads. V
The top stops, which are of synthetic resin material, are fused to the respective stringer tapes at the upper extremities of the continuous coupling elements. Each top stop integrally comprises a stop portion against which the slider abuts at the end of its fastener closing movement, and a guide portion which. as the slider draws near the end of the fastener closing movement.
enters relatively into the slider body to guide the slider which like reference characters denote corresponding parts of the several views.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a partial top plan view of a slide fastener incorporating a preferred form of the top stops according to the invention, in which the slider is shown in its topmost position on the pair of fastener stringers and in which the front wing of the slider is cut away to clearly reveal the relations between the top stops. the fastener stringers and the slider;
FIG. 2 is a perspective view of one of the fastener stringers shown in FIG. I; and
FIG. 3 is a sectional view taken along the plane of line III-III in FIG/I.
DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. I best illustrates the general organization of a slide fastener for which the improved top stops of this invention are particularly well adapted."lhe illustrated slide fastener comprises a pair of stringers I0 and a slider II. Each stringer It) has a tape I2 with a continuous coupling element 13 arranged along one of its longitudinal edges opposed to the corresponding edge of the other stringer tape. 7 y A Each continuous coupling element I3 is substantially in the form of a coil or helix of a synthetic resin filament and is secured to one surface only of each stringer tape 12 by a line of stitching 1.4 with the aid of a core member 15 extending longitudinally.throughthe coupling element. The continuous coupling element 13 comprises a series of uniformly intercsticcd coupling heads arranged along one of the longitudinal edges thereof for engagement between the similar coupling heads of the complementary coupling element, and a series of connective portions 17 arranged along the other longitudinal edge of the coupling element.
The slider 11, slidable along the pair of continuous coupling elements 13 in either direction to open or. close the fastener, has a body comprising a front wing 18 and a back w ing I9 which are interconnected by a web 20, as will be seen by referring also to FIG. 3. The wings I8 and I9 and the web 20define the usual Y shaped guide channel through which the coupling cle ments I3 are adapted to pass. The front wing I8 has a pair,of side flanges 2| which serve as guides for the.
coupling elementsv It will be noted from FIG. I that the side flanges 21 include divergent portions 22 adjacent the .llarcd top end 23 of the slider body and parallel portions 24 adjacent the contracted bottom end 25 of the slider body.
The general organization of the illustrated slide fastener. as so far described, has been well known in the art and constitutes. by itself. no feature of this invention.
According to the novel concepts of the invention, a cooperative pair of structurally similar top stops 26 are fixedly mounted on the respective stringers 10 at or ad;
j acent their opposed longitudinal edges 'and at theupper extremities of the respective continuous coupling elements 13. For the formation of each top stop 26. a chip orsheet of nylon or like synthetic resin material. may be placed in the specified position on each stringer 10. so as to partly overlie several of the connective portions 17. including the topmost one, of the continuous coupling element [3. The chip or the like is then fuscdunder application of pressure. as by the known high-frequency or ultrasonic welding techniques. in such a fashion that the resulting top stop 26 envelops and' unites integral with the several connective portions l7 of the coupling element.
Each top stop 26 thusvmolded and fused to the stringer tape is. formed. at the same time. with a guide portion 27. a stop portion 28 and a flat base por tion 29. The guide portion 27 is substantially in the shape of a right-angled trianglewhen seen in a plan view as shown in FIG. I. with a sloping guide edge or surface 30 located remote from the element carrying edge of the stringer tape 12. and generally tapers in a direction away from the top end of the fastener. The stop portion 28 is substantially rectangular in shape. is greater in height and in a dimension in the transverse direction ofth'e tape (see FIG. 2). and is located immediately on the fastener top-end side of the guide portion 27. mentioned previously. these guide portion 27 and stop portion 28 of each top stop 26 envelop and unite integralwith thc several connective portions 17. including the topmost one. of the corresponding continuous coupling clement l3 W lt \vill be observed from a consideration ofFlGS. l andy2 that at least thc topmost coupling head of each continuous coupling element 13. which head is transversely aligned with the stop portion 28 of each top stop 26. is removed from the coupling element. It is unne"es s' ry to remove the coupling heads transversely aligned with the guide portions 27 of the top stops.
hioperation. \vlien the slider ll slides along the continuous coupling elements 13 on its fastener closing movement to the topmost position on the pair ofstringers 'lil. the guide portions 27 of the topstops 26 first enterfrclatively into the slider body through its flared top end 23. As the divergent portions 22 of the side flanges 2l of the slider body slide along the respective sloping guide edges 30 of the guide portions 27. the slider 11 can be positively guided to its predetermined topmost position shown in Fl(iS. l and 3. in which position the top edges oftlie side flanges 2| abut against the respective stop portions 28 of the top stops.
It may be worth mentioning that since the stop portions 28 of the top stops 26 are by far the most conspicuous members on the stringer tapes 12 because oftheir extra height and transverse dimension. their positions on the stringer tapes can be visually ascertained in a simple and accurate manner. so that a border line 28: extending transversely and defined between the guide portion 27 and the stop portion 28 of each top stop 26 serves as a reference point in correctly positioning the top stop 26 \vithrespect to a preceding or first coupling .element 13a on each of the stringer tapes in the assem- 'bling process of slide fasteners.
Having thus described the invention, it is clear that the objects as stated above. either explicitly or otherwise. have been fully achieved in a simple and practical manner. However, the specific forms and arrangements of the various parts of the slide fastener as herein disclosed are purely by way ofexample and not'ofa limitative nature. The invention. therefore, should and is intended to be construed broadly and in a manner consistent with the fair meaning or proper scope of the following claims.
What is claimed is:
1. In a slide fastener of the type comprising a pair of stringer tapes each having a continuous coupling element arranged on one surface thereof so as to extend along its one longitudinal edge adjacent the other stringer tape. said eoupling'elcment being made of a synthetic resin filament and including a series of coupling heads arranged along one longitudinal edge of the coupling element and a series of connective portions arranged along the other longitudinal edge of the coupling element. said coupling heads being adapted to engage between the similar coupling heads of the other coupling element. and a slider slidable along said coupling elements and including a body having a flared top end and a contracted bottom end. said slider body ineluding a front wing and a back wing which are interconnected by a web located at said flared top end. said front wing of said slider body having a pair of side flanges. the combination thereof with a pair oftop stops made of synthetic resin material and fused to said stringer tapes at the upper extremities of said coupling elements. respectively. each of said top stops integrally comprising a stop portion against which the top edge of one of said side flanges of said front wing abuts when said slider is moved along said continuous coupling ele ments to its predetermined topmost position on the slide fastener. and a guide portion which is substantially in thc shape of a right-angled triangle as seen in a plan view and which generally tapers in a direction away from the top end of the slide fastener. said guide por-. tion being adapted to enter relatively into said slider body through said flared top end when said slider is moved close to said predetermined topmost position and hence to guide said slider to said predetermined topmost position. said stop portion of each top. stop being substantially rectangular in shape and being greater than said guide portion both in height and in a dimension in a transverse direction ofthe stringer tape. said stop portion and said guide portion of each top stop enveloping and uniting integral with several of said connective portions. including the topmost one. of the corresponding coupling element. I
2. The combination of claim I. wherein at least the topmost one of said coupling heads of each coupling element. which is transversely aligned with said stop portion of each top stop. is removed from the coupling element.