Metal working – Method of mechanical manufacture – Of a slide fastener
Patent
1984-12-06
1986-08-12
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Of a slide fastener
29766, 29770, B21D 5352, A41H 3706
Patent
active
046047832
ABSTRACT:
In a method of and apparatus for forming element-free spaces in a continuous slide fastener chain at ends of successive fly strips sewn to the slide fastener chain, the chain having a pair of intermeshed rows of coupling elements, portions of the intermeshed rows of coupling elements to be removed are detected by a sensor assembly disposed at a fixed position spaced a first distance upstream from a gap-forming device before such portions arrive at the gap-forming device. The sensor assembly first determines whether the longitudinal extent of a space provided between the confronting ends of an adjacent pair of the fly strips is larger than a predetermined distance, and then on the bases of the determination, controls the feeding of the chain and the operation of the gap-forming device so that the element-free spaces can be provided accurately at the ends of the respective fly strips regardless of the spacing between adjacent fly strips.
REFERENCES:
patent: 2836239 (1958-05-01), Johns et al.
patent: 3570104 (1971-03-01), Jensen
patent: 4443924 (1984-04-01), Osaki
patent: 4457062 (1984-07-01), Osaki
Ishikawa Kiichiro
Kojima Shin-ichi
Goldberg Howard N.
Nichols Steven
Yoshida Kogyo K. K.
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