Locking slider assembly and a method for its manufacture

A slide fastener incorporating a locking slider assembly, the slide fastener comprising:

• a fastener comprising two flexible strips and a set of interlocking teeth alternately attached to the two flexible strips;
• a rail having a travel direction and a cross-sectional dimension, the rail switchable between a first state in which the cross-sectional dimension has a first value and a second state in which the cross-sectional dimension has a second value, the second value greater than the first value;
• and
• a slider slidably engaged to the fastener, the slider having a mechanism that separates the interlocking teeth when the slider slides in a first direction and interlocks the interlocking teeth when the slider slides in a second direction, the slider further comprising a slot that fits over the rail, the slot having a first surface and a second surface, the first surface and second surface separated by a distance aligned with the cross-sectional dimension that is greater than the first value of the cross-sectional dimension and less than or equal to the second value of the cross-sectional dimension, so that the slot can slide over the rail when the rail is in the first state, and the slot cannot slide over the rail when the rail is in the second state.

A method for manufacturing a locking slider assembly, the method comprising:

• obtaining a slide fastener;
• attaching to the slide fastener a rail, the rail having a travel direction and a cross-sectional dimension, the rail switchable between a first state in which the cross-sectional dimension has a first value and a second state in which the cross-sectional dimension has a second value, the second value greater than the first value;
• and
• incorporating in the slide fastener a slider slidably engaged to the fastener, the slider having a mechanism that separates the interlocking teeth when the slider slides in a first direction and interlocks the interlocking teeth when the slider slides in a second direction, the slider further comprising a slot that fits over the rail, the slot having a first surface and a second surface, the first surface and second surface separated by a distance aligned with the cross-sectional dimension that is greater than the first value of the cross-sectional dimension and less than or equal to the second value of the cross-sectional dimension.