SLIDING CLASP FASTENERS

• US 3,750,605 A
• Filed: 08/04/1971
• Issued: 08/07/1973
• Est. Priority Date: 08/14/1970
• Status: Expired due to Term

• Current Assignee: Ernest Robert Whetter, Geoffrey Warburton
• Original Assignee: Ernest Robert Whetter, Geoffrey Warburton
• Inventors: Warburton, Geoffrey, Whetter, Ernest Robert
• Primary Examiner(s): Boler, James R.
• Application Number:
  US05/168,881
• Time in Patent Office: 734 Days
• Field of Search: 112/265,105 2/265 24/25.16R,25.16C,25.13C,25.1C 29/408
• US Class Current: 29/410
• CPC Class Codes: A44B 19/406 Connection of one-piece interlocking members
• CPC Class Codes: D05B 3/18 hooks or eyelets
• CPC Class Codes: Y10T 24/2527 Attached by stitching
• CPC Class Codes: Y10T 29/49785 of interlocking element

Abstract

A sliding clasp fastener is disclosed. The fastener comprises fastener strings of interlockable and U-shaped limbed fastener elements attached to respective fastener tapes by a line of stitching. The loops of the stitching pass over respective fastener elements to attach the fastener string to its fastener tape. Each string is anchored to its fastener tape by a filamentous element, such as a fine gauge cord or twisted textile thread, which meanders through spaces defined between the Ushaped limbs of the respective fastener elements in the longitudinal direction of the string. Also disclosed is a method of attaching a fastener string of U-shaped limbed fastener elements to a longitudinal fastener tape. The fastener tape and the string of fastener elements are fed past a stitching station at which a needle The an attaching machine is located. Te needle is used to insert a row of stitches to attach the fastener elements to the tape, and a filamentous element is fed in the longitudinal direction of the tape alternately in front of and behind the stitching needle transversely of the tape. The filamentous element passes through spaces defined between the limbs of the fastener elements to anchor the attaching stitching and hence to the tape.

Claims

1. A sliding clasp fastener portion comprising in combination:

a longitudinal fastener tape;

a plurality of interlockable and substantially U-shaped limbed fastener elements mutually interconnected by link portions to form a meander-like chain extending in the longitudinal direction of said tape;

at least one line of stitching comprising a plurality of loops each passing over a respective fastener element to attach said chain of fastener elements to said fastener tape;

at least one filamentous element passing through spaces defined between said limbs of said fastener elements in the longitudinal direction of said chain and passing through each one of said loops, said at least one filamentous element passing through successive ones of said loops from alternately opposite sides of said at least one line of stitching.

2. A method of attaching a plurality of interlockable U-shaped limbed fastener elements mutually interconnected by link portions to form a meander-like chain to a longitudinal fastener tape, the method comprising in combination the steps of:

feeding said fastener tape and said chain of fastener elements past a stitching station at which a needle of an attaching machine is located;

inserting at least one line of stitching to attach said chain of fastener elements to said tape with each loop of said at least one line oF stitching passing over a respective one of said fastener elements; and

feeding at least one filamentous element in the longitudinal direction of said tape alternately to one side and then to the other side of said needle transversely of said tape, said at least one filamentous element passing through spaces defined between said limbs of said fastener elements in the longitudinal direction of said chain and passing through each one of said loops, and said at least one filamentous element passing through successive ones of said loops from alternately opposite sides of said at least one line of stitching.

3. A method as defined in claim 2, wherein said first mentioned feeding step comprises the step of feeding in a stepwise manner said tape and said chain of fastener elements past said stitching station, with each feed step corresponding to the pitch distance taken centre to centre of the spaces between adjacent ones of said fastener elements.

4. A method as defined in claim 2, wherein said last mentioned feeding step comprises the step of feeding respective filamentous elements of at least one pair of filamentous elements alternately to one side and then to the other side of a thread defining said at least one line of stitching.

5. A method as defined in claim 2, wherein said at least one filamentous element is guided by means of a guide member reciprocating synchronously with the movement of said needle.