Transfer Device Electric Potential Control for Peel-Off Prevention
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Solution Overview
Problem
As image forming apparatuses have reduced in size, there is a need for strict control of electric potentials of members adjacent to the transfer region to prevent issues like peel-off failure and image blur, especially when using recording media with varying bending strengths and in different environments.
Innovation Solution
A transfer device with a transfer member, a first member electrically connected to it, and a downstream member that adjusts its electric potential based on the bending strength of the recording medium and environmental conditions, using a controller to maintain optimal electric potential balance across the transfer and fixing regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric potential of the downstream member is strictly controlled to prevent peel-off failure and image blur, then image quality and transfer reliability are improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The electric potential of the downstream member is made dynamically adjustable rather than fixed. The controller changes the electric potential based on the bending strength of the recording medium, allowing the system to adapt to different media types and environmental conditions, thereby preventing peel-off failure and image blur without requiring overly complex static control mechanisms
Solution Approach 2:
The system changes the electric potential parameter of the downstream member in response to changes in recording medium bending strength. By adjusting this electrical parameter dynamically, the system maintains reliable image transfer across varying conditions without adding significant structural complexity
2Reliability
If the electric potential of the downstream member is adjusted for recording media with high bending strength, then peel-off failure is prevented, but energy consumption increases
Solution Approach 1:
The electric potential adjustment is performed dynamically only when needed - specifically when a recording medium with high bending strength is detected. The controller modifies the downstream member's electric potential in response to medium changes, rather than maintaining high energy consumption continuously, thus preventing peel-off failure only when necessary
Solution Approach 2:
The system changes the electric potential parameter of the downstream member selectively based on the bending strength of the recording medium. This conditional parameter adjustment allows the system to prevent peel-off failure for high bending strength media while avoiding unnecessary energy consumption for media types that don't require such adjustment
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 solution effectively prevents peel-off failure and image blur by dynamically adjusting electric potentials in response to changes in recording medium strength and environment, ensuring reliable image transfer and fixation across various sheet types and conditions.
Implementation Method 1
a transfer member that transfers an image, which has been formed on a surface of an image carrier and carried by the image carrier, from the image carrier to a recording medium that passes through a space between the transfer member and the image carrier when a voltage is applied between the transfer member and the image carrier
Data Source
AI summary
A transfer device includes a transfer member that transfers an image from an image carrier to a recording medium; a first member that is electrically connected to the transfer member; a downstream member that is located downstream of the transfer member in a direction in which the recording medium moves, that is electrically connected to the transfer member via the first member, and that transfers the recording medium to a second member that is located downstream of the downstream member and that is electrically insulated from the downstream member; and a first electric potential controller that, when the recording medium is changed to a recording medium having a higher bending strength, changes an electric potential of the downstream member to an electric potential that is higher than an electric potential of the downstream member before the recording medium is changed.