Slide fastener slider, and slide fastener

By forming a black oxide film on the stainless steel lock pin with specific color and thickness parameters, the slide fastener slider achieves a uniform black appearance, addressing aesthetic issues and ensuring consistent color integration with the slider body.

US20260096634A1Pending Publication Date: 2026-04-09YKK CORP
0 Cites 2 Cited by

Patent Information

Application Number
US19/334509
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Priority Date
2025-01-19
Filing Date
2025-09-19
Publication Date
2026-04-09

AI Technical Summary

Technical Problem

Existing slide fastener sliders with automatic stop devices face issues in achieving a uniform black color tone between the lock pin and slider body due to differences in reflectance and absorbance of visible light, leading to aesthetic discomfort and potential functional limitations, especially when used on products requiring a pure black appearance.

Method used

The lock pin is made of stainless steel with a black oxide film formed on its surface, with specific L*, a*, and b* values in the CIELAB color space, ensuring a uniform black appearance by reducing visible light reflection and absorption, and the oxide film thickness is optimized to maintain a consistent black color across different viewing angles.

Benefits of technology

The solution provides a lock pin with a uniform, deep black color that integrates seamlessly with the slider body, eliminating aesthetic discrepancies and enhancing the product's overall appearance, suitable for applications requiring a pure black finish.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

A slide fastener slider, includes: a slider body; a puller, and a lock pin. The lock pin is made of a stainless steel material. A black oxide film is formed on a surface of the lock pin. The surface of the lock pin has brightness L* satisfying 31.70≤L*≤35.90, and a* of a value satisfying −0.708≤a*≤1.929, the brightness L′ and the a* of the value according to definitions in a CIELAB color space defined in JIS Z8781-4 (2013).
Need to check novelty before this filing date? Find Prior Art