# US 3,962,007 A · Method of making slide-fastener stringers

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- Number: US 3,962,007 A
- Document ID: US3962007A
- Status: Granted
- Kind: A
- Application number: 05/520,443
- Filed: 1974-11-01
- Granted: 1976-06-08
- Earliest claimed: 1974-01-25
- Assignees: Opti-Holding AG
- Inventors: Helmut Heimberger
- Web page: https://patentgrep.com/patent/US3962007A

## CPC

- B29D 5/00: Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
- B29C 65/08: using ultrasonic vibrations {(non-plastics element to plastics elements B29C65/645)}
- B29C 65/086: {using a rotary anvil}
- B29C 66/431: {Joining the articles to themselves (B29C66/4322 and B29C66/4332 take precedence)}
- B29C 66/7392: {characterised by the material of at least one of the parts being a thermoplastic}
- B29C 66/81427: {comprising a single ridge, e.g. for making a weakening line; comprising a single tooth}
- B29C 66/83411: {Roller, cylinder or drum types (B29C66/83431 takes precedence; rollers, cylinders or drums moving relative to and tangentially to the parts to be joined B29C66/8362)}
- B29C 66/83415: {the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle (B29C66/83433 takes precedence)}
- B29C 66/83431: {rollers, cylinders or drums cooperating with bands or belts}
- B29C 66/836: {Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table (B29C66/65 takes precedence)}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/47: {Joining single elements to sheets, plates or other substantially flat surfaces (B29C66/5326 takes precedence)}
- B29L 2005/00: Elements of slide fasteners
- Y10T 24/2539: Interlocking surface constructed from plural elements in series
- Y10T 29/5101: Slide fastener or slide fastener element
- Y10T 156/1039: Surface deformation only of sandwich or lamina [e.g., embossed panels]
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Slide-fastener stringers are made by extruding continuous strands of synthetic resin in a form having a plurality of cavities open on one side and defining the coupling head, shank and connecting portion of a multiplicity of coupling members which together form a coupling element adapted to be mounted along the edge of a support tape. An embossing tool is thrust into the connecting members and/or the shanks of the coupling members so as to plastically deform the thermoplastic material and produce humps along the surfaces of the coupling element which are thermally bonded to the support tape.

## Claims

### Claim 1

A method of making a slide fastener stringer half comprising the steps of molding a coupling element in the form of a succession of thermoplastic synthetic resin couplings in successive cavities of an endless mold carrier, the cavities being open to one side and defining for each such coupling member a coupling head, a fastening portion for mounting the coupling member on a tape and a connecting portion for linking each member with an adjacent member; embossing the synthetic resin at an elevated temperature in each cavity by pressing a tool into at least one of the portions thereof for displacing the synthetic resin opposite to the pressing direction and around said tool to form an array of welding humps at said one of said portions while forcing the synthetic resin into contact with all of the surfaces defining the respective cavities; and ultrasonically welding said coupling element to a support tape under heat and pressure at said welding humps substantially immediately upon the embossing thereof.

### Claim 2 (depends on 1)

The method defined in claim 1, further comprising the steps of embossing each coupling head with a formation simultaneously with the embossment of said one of said portions thereof.

### Claim 3 (depends on 1)

The method defined in claim 1 wherein each coupling member comprises a pair of such fastening portions extending in opposite directions away from the respective head in the respective cavity, said tape being welded to one connecting portion of each member initially, said method further comprising the steps of bending the other fastening portion of each member to confront said tape whereby each coupling member straddles said tape, and welding said other fastening portion to said tape under heat and pressure in the respective fastening humps.