Method of making coil type zipper fastener stringers

• US 3,316,870 A
• Filed: 03/27/1964
• Issued: 05/02/1967
• Est. Priority Date: 03/27/1964
• Status: Expired due to Term

• Current Assignee: John E. Burbank
• Original Assignee: John E. Burbank
• Inventors: Burbank, John E.
• Application Number:
  US04/355,197
• Time in Patent Office: 1,131 Days
• US Class Current: 112/475.16
• CPC Class Codes: A44B 19/406 Connection of one-piece interlocking members
• CPC Class Codes: Y10T 24/2523 with core encircled by coils or bends
• CPC Class Codes: Y10T 24/2527 Attached by stitching

Claims

1. THE PROCESS OF MAKING A ZIPPER FASTENER STRINGER IN A SEWING MACHINE COMPRISING (A) FEEDING A FLAT TAPE AND A COIL HAVING A CORD ENCLOSED THEREIN WITH THE FORWARD EDGE OF THE TAPE OVERLAPPING THE COIL;

(B) GUIDING A PLURALITY OF PARALLEL YARNS ALONG THE OUTSIDE EDGE OF THE COIL;

(C) PASSING PARALLEL LINES OF STITCHING ONE THROUGH THE TAPE AND COIL ALONGSIDE THE ENCLOSED CORD AND ANOTHER THROUGH THE TAPE AND SAID PLURALITY OF PARALLEL YARNS;

(D) INTERLOCKING SAID LINES OF STITCHING ON THE FRONTSIDE OF THE COIL OPPOSITE THE TAPE BY MEANS OF A THIRD THREAD WHILE APPLYING SUFFICIENT TENSION TO SAID THIRD THREAD TO PULL SAID PARALLEL YARNS INTO COVERING RELATION WITH SAID COIL AND ALSO TO BIND SAID CORD TIGHTLY IN THE COIL.