Transfer Sheet Printing Layout for Powder Contamination Control

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Solution Overview

Problem

Existing printing systems face poor workability due to the need for a large work space around the printing apparatus and powder spraying apparatus, leading to issues like hot-melt resin powder scattering and contamination when these devices are closely positioned.

Innovation Solution

A printing system with a secured space between the printing apparatus and powder spraying apparatus, allowing for transfer sheet replacement and using hot-melt resin powder with a specific particle diameter range, which minimizes scattering and contamination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the printing apparatus and powder spraying apparatus are disposed close to each other to reduce work space, then the work space requirement is reduced, but hot-melt resin powder may reach the printing apparatus due to replenishment operations

Engineering Contradiction:

Improvework spaceVSAvoidresin powder contamination

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent divides the work space into a first space between the printing apparatus and powder spraying apparatus, and a second space for operator access. This segmentation allows the apparatuses to be positioned closer together while maintaining adequate work space for safe operations and preventing powder contamination.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary structure (such as a shield or barrier) between the printing apparatus and powder spraying apparatus that prevents hot-melt resin powder from reaching the printing apparatus during replenishment operations, while still allowing the apparatuses to be disposed close to each other.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If a large work space is provided around each apparatus, then operational safety and accessibility are improved, but the overall system footprint increases

Engineering Contradiction:

Improveoperational accessibilityVSAvoidsystem footprint

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The patent merges the work space requirements by providing a shared first space between the printing apparatus and powder spraying apparatus, rather than requiring separate large work spaces around each apparatus. This reduces the overall system footprint while maintaining operational accessibility.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent utilizes vertical or lateral dimensions to arrange the apparatuses and work spaces, allowing operators to access both apparatuses through a shared pathway or access point, thereby reducing the horizontal footprint while maintaining ease of operation.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Area of stationary object

If the printing apparatus and powder spraying apparatus are disposed close to each other, then space efficiency is improved, but workability for replenishment and replacement operations deteriorates

Engineering Contradiction:

Improvespace efficiencyVSAvoidworkability

Core Design Contradiction:

Area of stationary objectVSEase of operation

Solution Approach 1:

The patent segments the operational space into a first space between the apparatuses and a second space for operator access, allowing close positioning of apparatuses while maintaining adequate workability for replenishment and replacement operations through properly designed access pathways.

Inventive Principle:

Principle #1Segmentation

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

Facilitates easy transfer sheet replacement and reduces the overall work space requirement while effectively preventing resin powder scattering and contamination, enhancing operational efficiency.

Implementation Method 1

a printing apparatus that performs printing by ejecting liquid onto a transfer sheet

Methodology Applied

Scientific EffectInkjet printing:

Implementation Method 2

a powder spraying apparatus that sprays a hot-melt resin powder onto the transfer sheet

Methodology Applied

Scientific EffectSpray: Spray

Implementation Method 3

hot-melt resin powder having a particle diameter of 10 μm or more and 350 μm or less

Methodology Applied

Scientific EffectMelting: Melting

Data Source

PatentUS20260070348A1Printing system

Publication Date: 2026.03.12 SEIKO EPSON CORP

AI summary

In a printing system including a printing apparatus that performs printing by ejecting liquid onto a transfer sheet and a powder spraying apparatus that sprays a hot-melt resin powder onto the transfer sheet, the printing apparatus includes a medium supply unit that holds the transfer sheet wound in a roll shape and a liquid ejection unit that ejects the liquid, the powder spraying apparatus includes a powder housing unit that houses the hot-melt resin powder having a particle diameter of 10 μm or more and 350 μm or less and a powder spraying unit that sprays the hot-melt resin powder onto the transfer sheet onto which the liquid has been ejected, and a first space in which the transfer sheet wound in a roll shape with respect to the medium supply unit can be replaced is secured between the printing apparatus and the powder spraying apparatus.