Activatable Environmental Sensor Print Media

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Solution Overview

Problem

Existing environmental indicators are often irreversible or require strict storage conditions before activation, making them impractical for widespread use in monitoring perishable products' exposure to environmental conditions.

Innovation Solution

Developing activatable environmental sensor print media with microcapsules that remain inactive until activated by heat or pressure, allowing for on-demand activation during the printing process, enabling efficient detection of historical exposure to environmental stimuli.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional environmental indicators are used, then they provide reliable historical exposure detection, but they require strict storage conditions prior to deployment

Engineering Contradiction:

Improvehistorical exposure detectionVSAvoidstorage conditions

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The indicator system is segmented into separate inactive components that are distributed independently and only assembled/activated at the point of use. This allows each component to be manufactured and stored without special conditions, while the complete system provides reliable detection when activated.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The indicator components are prepared in advance in an inactive state, allowing them to be manufactured and stored under normal conditions. The activation occurs at the appropriate time through assembly or environmental trigger, eliminating the need for continuous controlled storage while maintaining detection reliability.

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If activatable indicators with separate components are used, then storage conditions are relaxed, but device complexity increases

Engineering Contradiction:

Improvestorage conditionsVSAvoidcomponent structure

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The active sensing component is extracted and separated from the indicator material, allowing the indicator to remain inactive during storage. The separated components can be simple in structure individually, even though the system requires multiple parts that are assembled or activated at use.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The indicator system utilizes parameter changes (such as temperature, pH, or other environmental parameters) to trigger activation. This allows the system to transition from an inactive to active state through environmental conditions rather than complex mechanical assembly, reducing operational complexity.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If irreversible indicators are used, then historical exposure is reliably detected, but the indicators cannot be reused

Engineering Contradiction:

Improvehistorical exposure detectionVSAvoidindicator usability period

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The indicator system is designed to be disposable after use, with the inactive components being inexpensive and easy to manufacture. After providing the detection function, the indicator is discarded rather than attempted to be reset, simplifying the design while maintaining reliability for the duration of its intended use.

Inventive Principle:

Principle #34Discarding and recovering

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 efficient, on-demand activation of environmental indicators within the existing thermal printing ecosystem, reducing storage and handling costs while providing a visual indication of exposure to environmental stimuli, enhancing the monitoring of perishable products' integrity.

Implementation Method 1

The microcapsules are configured to respond to at least one of an activation heat or an activation pressure by allowing the environmental indicator material to be released from the microcapsules

Methodology Applied

Scientific EffectHeat-induced release: Heating

Implementation Method 2

The microcapsules are configured to respond to at least one of an activation heat or an activation pressure by allowing the environmental indicator material to be released from the microcapsules

Methodology Applied

Scientific EffectPressure-induced release: Pressure Increase

Implementation Method 3

The environmental indicator material is responsive to the predetermined environmental stimulus after the activation event and transitions the activatable environmental indicator from the activated configuration to the exposed configuration in response to exposure to the predetermined environmental stimulus

Methodology Applied

Scientific EffectEnvironmental stimulus response: Thermochromism

Data Source

PatentUS20250093272A1Activatable sensor platforms having indicators for activation verification

Publication Date: 2025.03.20 ZEBRA TECHNOLOGIES CORP

AI summary

Activatable environmental sensing through chemical encapsulation are disclosed herein. An example activatable environmental indicator has a non-activated configuration that is unresponsive to a predetermined environmental stimulus, an activated configuration that is responsive to the predetermined environmental stimulus, and an exposed configuration after responding to the predetermined environmental stimulus. The activatable environmental indicator includes a first visual indicator when the activatable indicator is in the non-activated configuration, a second visual indicator when the activatable indicator is in the activated configuration, and a third visual indicator when the activatable indicator is in the exposed configuration.