US 6,302,676 B1Granted

Apparatus for manufacturing slide fastener continuous element row

AssigneeYKK Corporation

InventorsTakashi Kato, Yoshihiro Kousaka, Shigeru Imai

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Abstract

The present invention provides an apparatus for manufacturing a slide fastener spiral continuous element row wherein a monofilament is carried on a mandrel while ensuring an accurate pitch of elements even in a high-speed operation and a stepped form of an upper leg portion can be accurately formed at a predetermined portion of each the element. In order to continuously manufacture the slide fastener spiral element row from the continuous monofilament made of synthetic resin, the monofilament transferred continuously is wound spirally around the mandrel and carried while being retained between screw grooves of opposed screws. Then, a coupling head is formed by hitting a portion of the spiral monofilament carried on the mandrel by a pressing roller, the portion corresponding to the coupling head. After that, a stepped upper leg portion is formed by pressing a portion of the spiral monofilament by a rotary hammer at a predetermined position on the mandrel, the portion corresponding to the upper leg portion.

Claims7

Dependent claims

An apparatus for continuously manufacturing a spiral slide fastener element row from a continuous monofilament made of synthetic resin, comprising

a pair of screws disposed in parallel to each other in a longitudinal direction and rotating in the same direction,
a mandrel extending in parallel to said screws between said pair of screws and having a substantially rectangular shape or an oval shape in section,
a coupling head forming portion disposed between said pair of screws so as to sandwich said mandrel and having a receiving body on one side and a coupling head forming pressing body for forming coupling heads of elements on the other side, and
an upper leg portion forming portion disposed on a front end side of said mandrel so as to be orthogonal to said coupling head forming portion,
wherein said front end side of said mandrel where said upper leg portion forming portion is disposed is formed into a bent portion having a substantially L shape in section, and
wherein said upper leg portion forming portion has an upper leg portion forming pressing body for pressing and deforming said monofilament in a stepped manner substantially along an inner face of said bent portion so as to eliminate a space formed between said bent portion and an inner peripheral edge of said monofilament wound around said bent portion.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/393,984Filed 10 Sep 1999
Priority: JP 10-26859922 Sep 1998
Granted: 16 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B29D 5/06
Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners: the interlocking members being formed by…
B29C 53/32
Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor: coiling
Y10S 425/814
Plastic article or earthenware shaping or treating: apparatus: zipper
B29D
Producing particular articles from plastics or from substances in a plastic state