Space forming and stop fixing apparatus for fastener chains
AssigneeYoshida Kogyo K. K.
InventorTatsuo Osaki
Life of this patent
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Abstract
In the apparatus for forming a space in and simultaneously fixing a stop to a fastener chain of this invention, a casing is provided with a tubular frame portion in which a punch holder having a space punch and a driver punch is received for sliding movement. This apparatus further includes a cutting punch between the driver punch and the inner wall of the tubular frame portion. When the punch holder descends, the cutting punch cuts a stop forming wire and forms the cut wire length into a stop preform in cooperation with an anvil. As the punch holder further descends, the driver punch drives the stop preform into the tapes of the chain and simultaneously the space punch forms a space in the chain. During this operation, the cutting punch rises relative to the punch holder so as not to damage the tapes.
Claims5
An apparatus for forming a space in and simultaneously fixing a stop to a fastener chain consisting of interengaged continuous stringers in which a space punch and a driver punch are provided for common movement, characterized in that the apparatus comprises:
- a casing having a tubular frame portion;
- a punch holder slidably received in said tubular frame portion and having said space and driver punches drivingly connected to the punch holder;
- drive means for reciprocating said punch holder in said tubular frame portion;
- a cutting punch provided between said driver punch and an inner wall of said tubular frame portion;
- a bender mounted on said casing for movement between a position in which it projects into the path of the driver punch movement and a retracted position in which it is out of the path of the driver punch movement;
- and
- a wire feeder for feeding a stop forming wire onto said bender,
- said cutting punch having an edge at a lower end thereof to cut said wire by a predetermined length, the lower end of said cutting punch being bifurcated to form a stop of a bottom-side-opened rectangular shape in cooperation with the bender, said cutting punch further having a channel for slidably guiding said driver punch so that the driver punch moves relative to the cutting punch to press down on said stop,
- said cutting punch connected to said punch holder for reciprocation therewith via a releasable lost motion means for substantially disconnecting said cutting punch from the reciprocable movement of said punch holder after said cutting punch has moved down to a preselected point such that further downward movement of said punch holder beyond said point drives only said space and driver punches.
Dependencies are inferred from the claim text.