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OwnerYoshio Matsudainventor
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An element row for a slide fastener made by stamping a monofilament made of synthetic resin. Element coupling heads have a shape which enables the elements to be reliably coupled with each other even though the gaps between upper and lower leg portions of the elements are small. Each coupling head has flat sectional portions extending from center portions of one of the ends of the upper and lower leg portions toward each other, and the flat sectional portions have increasing widths. A coupling portion of the element head is sandwiched between both the flat sectional portions, is thinner than the flat sectional portions, and has tip end portions projecting toward opposite sides in the longitudinal direction of the element row. The coupling portion is reliably engaged in a small gap formed between the coupling heads and the upper and lower leg portions of adjacent elements of a mating element row. An apparatus and method for making the element row is also disclosed.
A continuous element row for a slide fastener comprising:
A monofilament made of synthetic resin for slide fastener elements wherein the monofilament has coupling heads along the monofilament at predetermined pitches, each coupling head comprising flat sectional portions extending at opposed sides of the coupling head in a vertical direction of the monofilament, a coupling portion between and connected to the flat sectional portions and extending in vertical direction of the monofilament, the coupling portion being thinner than each of the flat sectional portions.
A method for producing a continuous element row for a slide fastener wherein a monofilament made of synthetic resin and supplied continuously is defined at least coupling heads of the slide fastener element row stamped by a pair of stamping rollers in a longitudinal direction of the monofilament at predetermined intervals, comprising
An apparatus for producing a continuous element row for a slide fastener wherein a monofilament made of synthetic resin and supplied continuously is defined at least coupling heads of the slide fastener element row stamped by a pair of stamping rollers in a longitudinal direction of the monofilament at predetermined intervals,
Dependencies are inferred from the claim text.