Patent ES-8604015-A1 (ES)
Title: Method of and apparatus for forming element-free spaces in continuous slide fastener chain with fly strips.
IPC: A44B19/42
Filed: 1984-12-05
Abstract: Method of gapping a continuous slide fastener chain which carries successive sewn fly strips comprises intermittently feeding the chain through a gap-forming station with the fly strips upfolded, and in advance of the station temporarily enlarging the space between fly strip ends. Sensors detect whether or not the space is larger than a reference amt., and while sensing departure of the trailing end of one strip sustansustain a dwell period before sensing arrival of the leading end (12a) of the next strip. - The sensors are spaced apart by the reference amt. and function in sequence if spaces are correct, but jointly if a space is excessive, for pulse-signalling counters. (0/4) EPAB- EP-146054 B Method of gapping a continuous slide fastener chain which carries successive sewn fly strips comprises intermittently feeding the chain through a gap-forming station with the fly strips upfolded, and in advance of the station temporarily enlarging the space between fly strip ends. Sensors detect whether or not the space is larger than a reference amt., and while sensing departure of the trailing end of one strip sustansustain a dwell period before sensing arrival of the leading end (12a) of the next strip. - The sensors are spaced apart by the reference amt. and function in sequence if spaces are correct, but jointly if a space is excessive, for pulse-signalling counters. (25pp Dwg.No.0/4) - EP-146054 B A method of formula element-free spaces in a continuous slide fastener chain at ends of successive fly strips sewn by at least one line of switching to the slide fastener chain having a pair of intermeshed rows of coupling elements said method comprising the steps of intermittently feeding a continuous ungapped slide fastener chain longitudinally through a gap-forming station, with the fly strips folded about the stitching to such an extent that the interengaged rows of coupling elements are fully exposed detecting portions of the intermeshed rows of coupling elements to be removed at said gap-forming station, stopping the feeding of the chain when the chain has advanced through said first distance after said sensing of the trailing and leading ends and removing the thus detected portions of the intermeshed rows of coupling elements at said gap-forming station while the chain is at rest, said detecting including the steps of temporarily providing a relatively large space between confronting ends of an adjacent pair of the folded fly strips when the confronting ends arrive at a first point which is spaced a first distance upstream from said gap-forming station, determining whether the longitudinal extent of the thus provided space is larger than a predetermined distance sensing the departure of the trailing end of a preceding one of the adjacent pair of the fly strips from said first point regardless of said determination of the longitudinal extent of the space thereafter sensing the arrival of the leading end of the succeeding fly strip at said first point only when the longitudinal extent of the space is larger than said predetermined distance (sic). (11pp) GBAB- GB2151301 B A method of forming element-free spaces in a continuous slide fastener chain at ends of successive fly strips sewn by at least one line of stitching to the slide fastener chain having a pair of intermeshed rows of coupling elements, said method comprising the steps of: (a) intermittently feeding a continuous ungapped slide fastener chain longitudinally through a gap-forming station, with the fly strips folded about the stitching to such an extent that the interengaged rows of coupling elements are fully exposed (b) detecting portions of the intermeshed rows of coupling elements to be removed at said gap-forming station by (1) temporarily providing a relatively large space between confronting ends of an adjacent pair of the folded fly strips when the confronting ends arrive at a first point which is spaced a first distance upstream from said gap-forming section, (2) determining whether the longitudinal extent of the thus provided space is larger than a predetermined distance, (3) sensing the departure of the trailing end of a preceding one of the adjacent pair of the fly strips from said first point regardless of said determination of the longitudinal extent of the space, and (4) thereafter sensing the arrival of the leading end of the succeeding fly strip at said first point only when the longitudinal extent of the space is larger than said predetermined distance (c) stopping the feeding of the chain when the chain has advanced through said first distance after said sensing of the trailing and leading ends and (d) removing the thus detacted portions of the intermeshed rows of coupling elements at said gap-forming station while the chain is at rest.i - GB2151301 B A method of forming element-free spaces in a continuous slide fastener chain at ends of successive fly strips sewn by at least one line of stitching to the slide fastener chain having a pair of intermeshed rows of coupling elements, said method comprising the steps of: (a) intermittently feeding a continuous ungapped slide fastener chain longitudinally through a gap-forming station, with the fly strips folded about the stitching to such an extent that the interengaged rows of coupling elements are fully exposed (b) detecting portions of the intermeshed rows of coupling elements to be removed at said gap-forming station by (1) temporarily providing a relatively large space between confronting ends of an adjacent pair of the folded fly strips when the confronting ends arrive at a first point which is spaced a first distance upstream from said gap-forming section, (2) determining whether the longitudinal extent of the thus provided space is larger than a predetermined distance, (3) sensing the departure of the trailing end of a preceding one of the adjacent pair of the fly strips from said first point regardless of said determination of the longitudinal extent of the space, and (4) thereafter sensing the arrival of the leading end of the succeeding fly strip at said first point only when the longitudinal extent of the space is larger than said predetermined distance (c) stopping the feeding of the chain when the chain has advanced through said first distance after said sensing of the trailing and leading ends and (d) removing the thus detacted portions of the intermeshed rows of coupling elements at said gap-forming station while the chain is at rest. USAB- US4604783 A Method and appts. for forming gaps free from coupling elements, at ends of successive fly strips sewn to a continuous slide fastener chain along at least one stitch line, in which the chain is folded about the stitch line as it is fed to and through a gap-forming station, so that the interengaged coupling element rows are fully exposed for gapping. - At the station a relatively large space is generated between the ends of successive strips, by turning the chain at a predetermined point upstream controlled by sensors.