Title (en)

METHOD OF AND APPARATUS FOR MANUFACTURING SLIDE FASTENER COUPLING ELEMENTS

Publication

EP 0064764 B1 19850828 (EN)

Application

EP 82104079 A 19820511

Priority

• JP 7200481 A 19810513
• JP 21506081 A 19811229

Abstract (en)

[origin: EP0064764A2] A method of and apparatus for manufacturing coupling elements (2 min ), suitable for a two-way slide fastener (3), successively from a rod (4) of metal of a generally Y-shaped cross section having a base (5), as a prospective coupling head, and a pair of diverging-legs (6, 6). As the rod (4) is fed longitudinally stepwise, it is transversely sliced into a plurality of coupling element blanks (2), one at a time, on the backward stroke of relative movement of a coacting cutting die and punch (10, 11). At the end of the backward stroke of the cutting die and punch (10, 11), a chamfering surface (21) on the cutting punch (11) is forced against the base (5) of the rod (4) to form a chamfered portion (20) thereon so that each sliced coupling element blank (2) has the chamfered base (5 min ). The chamfered base (5 min ) of each coupling element blank (2) is then formed, by a coacting forming die and punch (12,13), into a final coupling head (5 sec ) of one coupling element (2 min ) which head has a projection (30) from one face and a socket (31) in the other face at such a position that the chamfered portion (20) is disposed around the socket (31).

IPC 1-7

B21D 53/52

IPC 8 full level

A44B 19/06 (2006.01); B21D 53/52 (2006.01)

CPC (source: EP)

A44B 19/06 (2013.01); B21D 53/52 (2013.01)

Designated contracting state (EPC)

BE DE FR IT NL

DOCDB simple family (publication)

EP 0064764 A2 19821117; EP 0064764 A3 19830720; EP 0064764 B1 19850828; AU 536108 B2 19840419; AU 8320082 A 19821118; BR 8202760 A 19830419; DE 3265787 D1 19851003; DE 64764 T1 19840202; HK 62188 A 19880826

DOCDB simple family (application)

EP 82104079 A 19820511; AU 8320082 A 19820503; BR 8202760 A 19820513; DE 3265787 T 19820511; DE 82104079 T 19820511; HK 62188 A 19880818