Importance

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Abstract

A method of manufacturing a continuous slide fastener stringer, comprising the steps of: providing a continuous stringer tape having a plurality of openings along a longitudinal edge thereof at regular intervals of a first distance d; then placing a part of the tape between a pair of mold members defining a number of mold cavities spaced at regular intervals of a second distance D slightly greater than the first distance d; then stretching the part of the tape until the openings in that part are aligned with the mold cavities; then injecting melted synthetic resin material into mold cavities, while the mold members are closed, to form on the part of the tape of number of the injection-molded coupling elements one at each of the openings; and repeating the preceding steps, except the first-mentioned step, for a succeeding part of the tape. An apparatus for carrying out the method includes a frame having the mold members, and stringer tape advancing means, such means effecting suitable stretching of the part of the tape between the mold members so as to align the tape openings with the mold cavities.

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First Claim