Image-Forming Charge Elimination With Contact and Non-Contact Units
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Solution Overview
Problem
Existing image forming systems face challenges in uniformly and efficiently eliminating electric charges on recording media, particularly high-resistance dielectric materials, which can lead to media adhesion, noise generation, and incorrect inspection results due to varying charge elimination effectiveness over time and transport speed changes.
Innovation Solution
An image forming system incorporating a charge eliminating apparatus with a combination of contact and non-contact charge eliminating units, controlled by a relay apparatus to stabilize transport speed and ensure uniform charge elimination before post-processing and inspection, using a controller to manage roller operations and peeling mechanisms to prevent sheet jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single contact charge eliminating unit is used, then the structure is simple, but charge elimination uniformity deteriorates due to transport speed variations
Solution Approach 1:
The charge eliminating unit is divided into multiple independent charge eliminating members (first, second, and third members) arranged in the transport direction. Each member independently eliminates charge from different regions of the recording medium, ensuring uniform charge elimination even when transport speed varies. This segmentation allows the system to maintain consistent performance across different operating conditions without increasing overall structural complexity significantly.
2Productivity
If transport speed varies, then productivity is improved, but charge elimination uniformity deteriorates
Solution Approach 1:
The system employs multiple charge eliminating members that can operate effectively across a range of transport speeds. The members are positioned at different locations in the transport direction, creating a dynamic charge elimination zone that adapts to varying speeds. This dynamic arrangement ensures that charge elimination remains uniform regardless of whether the transport speed is high or low, resolving the contradiction between productivity and precision.
3Reliability
If charge elimination is insufficient, then media adhesion and noise occur, but adding more charge eliminating units increases device complexity
Solution Approach 1:
Multiple charge eliminating members are merged into a single integrated charge eliminating unit that operates together to eliminate charge uniformly across the recording medium. The members share common support structures and control mechanisms, achieving enhanced charge elimination effectiveness without proportionally increasing device complexity. This merging approach prevents media adhesion and noise while maintaining structural efficiency.
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
Ensures uniform charge elimination across varying transport speeds, preventing media adhesion and noise, ensuring accurate inspection and smooth post-processing by stabilizing charge levels on recording media.
Implementation Method 1
a first contact charge eliminating unit that eliminates a majority of electric charge charged on the charged medium, the first contact charge eliminating unit including a charge eliminating member that comes into contact with the transported charged medium
Implementation Method 2
a second non-contact charge eliminating unit that eliminates residual electric charge of the charged medium in a non-contact state after the charge elimination by the first contact charge eliminating apparatus
Data Source
AI summary
An image forming system includes: an image forming apparatus configured to form an image on a recording medium; a post-processing apparatus configured to perform post-processing on the recording medium on which an image is formed by the image forming apparatus; a relay apparatus having a function of changing a transport speed of the recording medium on which an image is formed by the image forming apparatus to a transport speed of the post-processing apparatus and transporting the recording medium to a subsequent stage; and a charge eliminating apparatus configured to perform charge elimination on the recording medium that is charged, by reducing a charge amount of the charged recording medium, and the charge eliminating apparatus is provided at a stage that is after the relay apparatus and before the post-processing apparatus.