Endless Belt Transfer Device for Non-Smooth Paper
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Solution Overview
Problem
In image forming apparatuses using an endless belt as an intermediate transfer body, the transferability of toner images onto non-smooth paper sheets is compromised due to the inability of the intermediate transfer body to follow the surface irregularities of the recording medium, leading to deteriorated transfer quality and the formation of white patches.
Innovation Solution
An endless belt containing a resin and electrically conductive particles with an integrated discharge amount of 350 μC or less, determined by a specific measurement method, is used as the intermediate transfer body, which improves transferability by reducing abnormal discharge and reverse charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate transfer body is used for transferring toner images onto non-smooth paper sheets, then transferability deteriorates and white patches are formed, but the problem is not caused by the intermediate transfer body itself but by its inability to follow surface irregularities
Solution Approach 1:
The patent changes the electrical discharge parameters of the intermediate transfer body by controlling the integrated discharge amount to 350 μC or less. This parameter control enables the belt to follow surface irregularities better while preventing abnormal discharge, thereby improving transferability onto non-smooth paper sheets without forming white patches
Solution Approach 2:
The intermediate transfer body is constructed as a composite material containing a resin and electrically conductive particles. This composite structure allows the belt to simultaneously maintain mechanical integrity and control electrical discharge properties, enabling it to follow surface irregularities while preventing abnormal discharge phenomena
2Reliability
If the integrated discharge amount is reduced to 350 μC or less, then abnormal discharge and reverse charging are reduced, but the measurement and control precision must be maintained at high levels
Solution Approach 1:
The patent replaces complex mechanical adjustment methods with an electrical measurement-based control system. By measuring the integrated discharge amount electrically and using this data to adjust the intermediate transfer body properties, the system achieves precise control of transfer quality without requiring complex mechanical measurement and adjustment mechanisms
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 use of the endless belt with the specified discharge characteristic enhances the transferability of toner images onto non-smooth paper sheets, preventing white patches and ensuring high image quality even with small-diameter toners.
Implementation Method 1
an integrated discharge amount is 350 μC or less, the integrated discharge amount being determined by disposing an electrode at a position spaced 60 μm apart from the outer circumferential surface of the belt, applying a voltage to the electrode, and measuring the amount of discharge for a period of 1 second after the voltage reaches 1300 V
Data Source
AI summary
An endless belt includes: a resin; and electrically conductive particles, wherein an integrated discharge amount is 350 μC or less. The integrated discharge amount is determined by disposing an electrode at a position spaced 60 μm apart from the outer circumferential surface of the belt, applying a voltage to the electrode, and measuring the amount of discharge for a period of 1 second after the voltage reaches 1300 V.