Booklet Toner Layering for Stronger Sheet Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing booklets using multiple toner colors result in insufficient bonding strength due to variations in toner physical properties and stacking order, leading to reduced adhesive area and increased likelihood of delamination.
Innovation Solution
An image forming apparatus and method that forms adhesive layers using toners with specific storage elastic modulus relationships, ensuring that the modulus of the toner in contact with the sheet is higher than the others, and applying heat and pressure to bond multiple sheets together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If multiple toner colors are used to form adhesive layers, then toner consumption of specific color is reduced, but bonding strength becomes insufficient
Solution Approach 1:
The patent applies local quality by assigning different toner types to different positions within the adhesive layer structure. Specifically, a first toner with higher storage elastic modulus is used in the first adhesive layer, while a second toner with lower storage elastic modulus is used in the second adhesive layer. This positional differentiation of material properties optimizes both adhesion to the sheet and overall bonding strength, resolving the contradiction between toner consumption distribution and bonding performance.
Solution Approach 2:
The patent employs composite materials by combining multiple toner types with different physical properties in a layered adhesive structure. The first toner and second toner have different storage elastic moduli and are stacked in a specific sequence, creating a composite adhesive system that leverages the advantages of each toner type to achieve both reduced consumption and sufficient bonding strength.
2Quantity of substance
If adhesive layer thickness is reduced, then material usage decreases, but bonding strength and adhesion area are reduced
Solution Approach 1:
The patent applies parameter changes by controlling the storage elastic modulus values of different toners and their stacking order, rather than simply increasing adhesive layer thickness. By adjusting these material parameters and their arrangement, the invention achieves sufficient bonding strength with optimized material quantity, resolving the contradiction between material usage and bonding performance.
3Quantity of substance
If voids are present between toner layers, then material usage decreases, but adhesion breaks and cohesive breakdown occurs
Solution Approach 1:
The patent applies local quality by optimizing the interface properties between different toner layers. The specific combination of first toner and second toner with different storage elastic moduli creates favorable adhesion at the interface, preventing void formation and ensuring reliable bonding throughout the adhesive structure, thus resolving the contradiction between material efficiency and adhesion reliability.
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
Achieves desirable booklet bonding strength by optimizing the elastic modulus of multiple toner layers, preventing delamination and ensuring strong adhesion between sheets.
Implementation Method 1
an image forming apparatus using an electrophotographic recording system
Implementation Method 2
an image forming apparatus using an electrophotographic recording system
Implementation Method 3
applying heat and pressure to the sheet bundle so that the sheets are bonded to each other
Data Source
AI summary
An image forming apparatus at least comprising: first image forming means for forming a first adhesive layer of a first toner on a sheet; and second image forming means for forming a second adhesive layer of a second toner on the first adhesive layer, adhesive image patterns are formed from the first and the second adhesive layer, the image forming apparatus further comprising specific booklet bonding means, wherein at least both the first and the second adhesive layer are formed on one of a first sheet and a second sheet that face each other in the sheet bundle, at least the first adhesive layer is formed on the other of the first sheet and the second sheet, and G1>G2 is satisfied, where G1 denotes a storage elastic modulus of the first toner, and G2 denotes a storage elastic modulus of the second toner.