Substrate Transport Surface Guides for Registration Accuracy

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Solution Overview

Problem

High-speed substrate transportation in manufacturing processes leads to defects due to cross-machine direction weave and z-direction bounce, resulting in incorrect registration, fouling, and inaccurate application of transferable media like ink or adhesive.

Innovation Solution

An apparatus with pairs of transport surface guides positioned to limit movement in the cross-machine and z-directions, combined with a vacuum source to maintain substrate alignment and prevent bouncing, ensuring precise application of coatings during high-speed manufacturing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If substrate is transported at high speed through manufacturing process, then productivity is improved, but substrate experiences cross-machine direction weave and z-direction bounce causing registration errors and coating defects

Engineering Contradiction:

Improvetransportation speedVSAvoidsubstrate registration accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent changes the physical parameters of the transport surface by introducing a patterned structure with varying heights or depths. This creates different friction zones that actively control substrate movement, allowing high-speed transport while maintaining registration accuracy through controlled slip and grip zones

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The transport surface is segmented into multiple zones with different friction characteristics. These segmented zones work together to control substrate movement in the machine direction while preventing cross-machine direction weave and z-direction bounce, resolving the contradiction between speed and precision

Inventive Principle:

Principle #1Segmentation

2Speed

If substrate experiences cross-machine direction weave, then transportation speed can be maintained, but cutting lines and graphics become misaligned causing defects

Engineering Contradiction:

Improvetransportation speedVSAvoidcross-machine direction registration

Core Design Contradiction:

SpeedVSManufacturing precision

Solution Approach 1:

The transport surface parameters are modified to include directional friction variations that specifically counteract cross-machine direction weave. The patterned structure creates asymmetric friction zones that guide the substrate to follow the intended path, preventing lateral deviation while maintaining high-speed transport

Inventive Principle:

Principle #35Parameter changes

3Speed

If substrate experiences z-direction bounce, then high-speed transport is maintained, but transferable medium source becomes fouled and coating accuracy decreases

Engineering Contradiction:

Improvetransportation speedVSAvoidsubstrate bounce

Core Design Contradiction:

SpeedVSObject-generated harmful factors

Solution Approach 1:

The patterned transport surface acts as a cushioning mechanism that anticipates and prevents z-direction bounce before it occurs. The varying friction zones absorb and dampen vertical vibrations, keeping the substrate firmly positioned on the transport surface throughout high-speed transport, thereby preventing bounce-related defects

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Adaptability or versatility

If tension fluctuates during manufacturing process, then substrate can be handled by multiple equipment at different speeds, but substrate stretches or bunches causing incorrect medium application

Engineering Contradiction:

Improveequipment speed compatibilityVSAvoidsubstrate placement accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The transport surface parameters are dynamically adjusted through its patterned structure to compensate for tension fluctuations. The varying friction zones adapt to changing substrate tension conditions, maintaining consistent grip and preventing stretching or bunching even when equipment speeds vary, thus preserving placement accuracy

Inventive Principle:

Principle #35Parameter changes

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

The apparatus effectively minimizes substrate movement errors, maintaining accurate registration and consistent coating application, reducing defects and improving the precision of transferable medium application on substrates.

Implementation Method 1

a vacuum source to maintain substrate alignment and prevent bouncing

Methodology Applied

Scientific EffectVacuum: Vacuum

Data Source

PatentUS10351378B2Apparatue for controlling movement of a substrate

Publication Date: 2019.07.16 KIMBERLY CLARK WORLDWIDE INC

AI summary

An apparatus can control the movement of a substrate through a manufacturing process. The apparatus can transport the substrate in the machine direction of the manufacturing process and can control the movement of the substrate in the cross-machine direction as well as the z-direction.