Thermal Printer Cartridge with Multicolor Heat-Sensitive Medium

Solution Overview

Problem

Current thermal printers using heat-sensitive media can only produce monochrome laminated media and lack adequate protection for heat-sensitive layers, as they do not allow for multicolor printing and provide insufficient protection for the heat-sensitive layers.

Innovation Solution

A thermal printer cartridge with a heat-sensitive medium having visible light transmittance, comprising a base material, multiple heat-sensitive layers, and heat-insulating layers, where the adhesive medium is bonded to the opposite side of the heat-sensitive medium to protect the layers and enable multicolor printing by heating the heat-sensitive medium from the side opposite the base material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive medium is bonded to the side of heat-sensitive medium opposite the base material, then heat-sensitive layers are better protected, but base material cannot provide adequate protection

Engineering Contradiction:

Improveprotection of heat-sensitive layersVSAvoidstructural simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The protective function is segmented between two separate components: the base material provides initial protection and structural support, while the adhesive medium provides additional protection when bonded to the opposite side. This segmentation allows each component to fulfill its protective role effectively.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Protection is extended from one dimension (base material from one side) to two dimensions (base material from one side + adhesive medium from the other side). This dimensional expansion ensures comprehensive protection of heat-sensitive layers from both directions.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If multiple heat-sensitive layers with different temperature thresholds are used, then multicolor printing is enabled, but heat distribution control becomes more difficult

Engineering Contradiction:

Improvecolor reproduction capabilityVSAvoidheat control system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Different regions of the thermal head are designed with different heating characteristics to match the temperature requirements of different heat-sensitive layers. This allows selective activation of specific layers at different temperatures, enabling multicolor printing without requiring complex centralized control.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system utilizes changes in temperature parameters to control which heat-sensitive layers are activated. By varying the heating temperature, different colors can be produced from different layers, simplifying the control mechanism while maintaining versatility.

Inventive Principle:

Principle #35Parameter changes

3Illumination intensity

If heat-sensitive medium with visible light transmittance is used, then image visibility is improved, but protection of heat-sensitive layers from environmental factors is reduced

Engineering Contradiction:

Improveimage visibilityVSAvoidenvironmental exposure

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The protective function is segmented between two separate components: the base material provides initial protection and structural support, while the adhesive medium provides additional protection when bonded to the opposite side. This segmentation allows each component to fulfill its protective role effectively.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Protection is extended from one dimension (base material from one side) to two dimensions (base material from one side + adhesive medium from the other side). This dimensional expansion ensures comprehensive protection of heat-sensitive layers from both directions.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 solution allows for the creation of laminated media with a wider range of reproducible colors while effectively protecting the heat-sensitive layers, enhancing the durability and visibility of printed images.

Implementation Method 1

The thermal head is configured to heat the heat-sensitive medium exposed to an outside of the cartridge case

Methodology Applied

Scientific EffectThermal heating: Heating

Implementation Method 2

at least one heat-insulating layer having visible light transmittance and including a first heat-insulating layer

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS12187031B2Cartridge, thermal printer using the cartridge, medium for use with the thermal printer, and method for creating laminated medium

Publication Date: 2025.01.07 BROTHER KOGYO KK

AI summary

A cartridge includes: a cartridge case; a first supply portion including a heat-sensitive medium; and a second supply portion including an adhesive medium. The heat-sensitive medium includes a base material, a plurality of heat-sensitive layers, and at least one heat-insulating layer in a stacked state. The heat-sensitive layers include: a first heat-sensitive layer for producing a first color when heated above a first temperature; and a second heat-sensitive layer for producing a second color when heated above a second temperature higher than the first temperature. The cartridge case includes: an opening for exposing the heat-sensitive medium; and a guide part positioned downstream of the opening in a conveying direction of the heat-sensitive medium for guiding the heat-sensitive medium and the adhesive medium bonded to a surface of the heat-sensitive medium opposite the base material with respect to the plurality of heat-sensitive layers.