Post-Production Footwear Laser Etching Across Midsole Boundaries

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing methods struggle to seamlessly integrate visual and tactile designs across multiple components of assembled footwear, making it difficult to achieve consistent customization post-production.

Innovation Solution

A laser etching system is used to customize the visual and tactile appearance of footwear by etching designs continuously across the midsole sidewall, fluid-filled bladder sidewall, and forward midsole component sidewall, utilizing a laser head, workpiece holder, movement system, and computer numerical controller to control the laser beam's orientation and depth.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If designs are applied prior to assembly, then manufacturing process is simpler, but continuous designs across multiple components cannot be achieved

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoidcontinuous design capability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent applies preliminary action by pre-assembling the footwear components (upper, midsole, outsole, bladder) before applying the design. This allows the design to be applied to the complete assembled structure, enabling continuous patterns across component boundaries while maintaining manufacturing simplicity through post-assembly customization.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If designs are applied after assembly, then continuous designs across components are achieved, but manufacturing complexity increases

Engineering Contradiction:

Improvecontinuous design capabilityVSAvoidmanufacturing process simplicity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent replaces mechanical design application methods (stamping, molding, printing) with laser-based energy delivery. The laser system can precisely etch or melt materials on assembled footwear components, creating continuous designs without requiring complex mechanical tooling or disassembly operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Adaptability or versatility

If laser etching is used for customization, then visual and tactile appearance is enhanced, but risk of structural damage increases

Engineering Contradiction:

Improvecustomization capabilityVSAvoidstructural integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent employs parameter changes by precisely controlling laser energy delivery parameters (power, pulse duration, scanning speed, focal point) to achieve the desired etching depth and pattern. This allows customization of visual and tactile appearance while maintaining structural integrity through optimized energy parameters that remove only surface material without compromising underlying structure.

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If deep etching is applied for tactile texture, then visual differentiation is improved, but structural strength is reduced

Engineering Contradiction:

Improvevisual differentiationVSAvoidmaterial strength

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The patent applies local quality by creating etched features with controlled depth and distribution. The laser system can vary etching depth locally across different regions of the footwear, providing tactile texture and visual differentiation in specific areas (such as sidewalls or outsoles) while leaving other areas intact to maintain overall structural strength.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables seamless customization of footwear by creating continuous designs and textures that enhance differentiation and authentication, while maintaining the structural integrity and comfort of the footwear.

Implementation Method 1

a laser head (302) configured to deliver energy to an outer surface of an article of footwear (10) to alter a visual characteristic of the material used to form the article

Methodology Applied

Scientific EffectLaser: Laser

Implementation Method 2

The laser head (302) may be adjusted to etch channels in the material of the footwear

Methodology Applied

Scientific EffectLaser ablation: Laser Ablation

Data Source

PatentEP4157009B1Post production laser modification of an article of footwear

Publication Date: 2025.08.13 NIKE INNOVATE CV

Figure 1
Figure 2
Figure 3

AI summary

A sole assembly for an article of footwear includes a midsole that is formed from at least a bladder and foam midsole component. The midsole has a ground facing surface and a sidewall, and the bladder meets the foam midsole at a component boundary on the sidewall. An etching extends into both the foam midsole and the bladder. The etched channel has a depth into the sidewall of between about 2 mm and about 1000 µm and continuously extends across the component boundary.