Ink Ribbon Layered Structure for Print Quality and Durability

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Solution Overview

Problem

Existing ink ribbon technologies face a challenge in balancing improved print quality with durability, as lowering the melting point for faster ink melting and transfer can compromise the ink ribbon's durability, especially under high ambient temperatures.

Innovation Solution

The ink ribbon is designed with a second layer having a melting point of 60°C or more but less than 90°C, and a wax component weight ratio of 50% to 70%, allowing for improved adherence and print quality while maintaining durability through a balanced layer structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the melting point of the second layer is lowered to improve print quality and speed up ink melting and transfer, then print quality is improved, but the durability of the ink ribbon decreases during transport under high ambient temperature conditions

Engineering Contradiction:
Improveprint qualityVSAvoiddurability of ink ribbon
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The ink ribbon is divided into multiple layers with different functions: a first layer (ribbon base layer) providing structural support and durability, and a second layer (ink layer) optimized for melting and transfer with a lower melting point. This segmentation allows each layer to be optimized independently, resolving the contradiction between print quality and durability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The melting point of the second layer is specifically controlled within the range of 60°C or more but less than 90°C, and the wax component content is adjusted to 50% or more by weight. These parameter optimizations enable the second layer to melt quickly for high-quality printing while the first layer maintains structural integrity and durability during transport.

Inventive Principle:
Principle #35Parameter changes

2Productivity

If the melting point of the second layer is lowered to speed up melting and transfer for high-speed printing, then printing speed and quality improve, but the ink ribbon integrity deteriorates under high temperature conditions

Engineering Contradiction:
Improveprinting speedVSAvoidink ribbon integrity
Core Design Contradiction:
ProductivityVSStability of the object's composition

Solution Approach 1:

The ink ribbon is divided into multiple layers with different functions: a first layer (ribbon base layer) providing structural support and durability, and a second layer (ink layer) optimized for melting and transfer with a lower melting point. This segmentation allows each layer to be optimized independently, resolving the contradiction between print quality and durability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The melting point of the second layer is specifically controlled within the range of 60°C or more but less than 90°C, and the wax component content is adjusted to 50% or more by weight. These parameter optimizations enable the second layer to melt quickly for high-quality printing while the first layer maintains structural integrity and durability during transport.

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

This configuration enhances print quality, particularly at high speeds, while preventing durability decreases under high temperatures, effectively striking a balance between print quality and ribbon integrity.

Implementation Method 1

an ink melted by received heat adheres to a transfer target, forming print

Methodology Applied
Scientific EffectMelting: Melting

Implementation Method 2

Each of the printing heads melts and transfers ink included in each of the ink ribbons to the printing medium by heating the ink ribbons

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Data Source

PatentEP3321091B1Ink ribbon, ribbon cartridge, and printer
Publication Date: 2019.06.05 BROTHER KOGYO KK
  • EP3321091B1 patent drawingFigure 1
  • EP3321091B1 patent drawingFigure 2
  • EP3321091B1 patent drawingFigure 3

AI summary

An ink ribbon (IB) comprises a ribbon base layer (155a), a first layer (155b) that is configured to separate from the ribbon base layer (155a) and is disposed on a first surface of the ribbon base layer (155a), and a second layer (155d; 155c') that is configured to adhere to a transfer target and is disposed on the first layer (155b). The melting point of the second layer (155d; 155c') is 60 °C or more and 90 °C or less.