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AssigneeYKK Corporation
InventorsKozo Watanabe, Kazuki Kuse
Estimating the term…
By fusing reinforcing tapes with bottom end attaching portions of fastener tapes by pressurizing heating means with different pressures (i.e., high and low), thus weakening of attaching portions can be prevented. Core threads are fitted to side edges of fastener tapes to form core portions. Reinforcing tapes formed of thermoplastic elastomer film or thermoplastic resin film are fused to wrap tape end portions including the core portions so as to form the bottom end attaching portions. The reinforcing tapes fused the core portions and vicinity portions to the fastener tapes with a low pressure and at tape main body portions to the fastener tapes with a high pressure, thereby making the core portions and the vicinity portions flexible and thick and making the tape main body portions stiff and thin to form stepped portions. The stepped portions are positioned outside flanges of a slider. A box and a box pin are attached to one of the core portion and core portion vicinity portions, and an insert pin is attached to the other core portion and vicinity portions, thereby preventing the attaching portions from being cracked and weakened.
Bottom end stop attaching portions of fastener tapes comprising reinforcing tapes which correspond to a box pin and an insert pin, are covered around core portions, and are fused with surfaces and rear faces of tape main body portions, the reinforcing tapes covered around the core portions and vicinity portions adjacent to the core portions are fused with the fastener tapes by pressurizing heating means with a first pressure, and the reinforcing tapes disposed on the tape main body portions are fused with the fastener tapes by the pressurizing heating means with a higher pressure than the first pressure, wherein the core portions and the vicinity portions have a greater flexibility than the tape main body portions.
A bottom end stop attaching portion of a slide fastener tape, comprising:
A method of reinforcing a bottom end stop attaching portion of a slide fastener tape, comprising the steps of:
Dependencies are inferred from the claim text.