Adjustable Tensioning Transfer Belt for Image Forming Devices
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Solution Overview
Problem
Toner transfer belts in image forming devices face damage due to prolonged tension, especially in hot environments, leading to motion quality defects and reduced lifespan, and existing designs often include unnecessary parts that increase costs and maintenance needs.
Innovation Solution
An adjustable tensioning device that pivots to change the position of the tension roll, allowing for varying levels of tension on the transfer belt, reducing belt set and enabling multiple functions with fewer parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If tension is applied to the transfer belt to provide drive capability, then the belt can be driven effectively, but the belt may take the form of the rolls it wraps around causing belt set and motion quality defects
Solution Approach 1:
The tension roll is made movable along the arm to dynamically adjust tension levels. During image formation, the tension roll positions itself to apply appropriate tension for drive capability. During storage or non-operation, the tension can be reduced or removed to prevent belt set, allowing the belt to return to its original form and prevent motion quality defects.
2Productivity
If the arm is positioned to apply tension for image formation, then the toner image can be formed and transferred, but the belt is subjected to damaging tension especially in hot environments
Solution Approach 1:
The system periodically adjusts tension levels based on operational state. During image formation periods, tension is applied to enable proper belt drive and image transfer. During storage periods or when the device is not in use, the tension is reduced or removed to prevent cumulative damage to the belt, thereby extending its lifespan especially in hot environments where damage risk is higher.
3Stability of the object's composition
If multiple parts are used to maintain constant tension, then the belt remains stable during operation, but the cost and maintenance requirements increase
Solution Approach 1:
The arm structure serves multiple functions: it positions the tension roll, provides a pivot point for tension adjustment, and acts as a support element. This multi-functional design eliminates the need for separate constant tension mechanisms while maintaining stable belt tension during operation, thereby reducing overall device complexity and part count.
Data Source
AI summary
The present application is directed to toner transfer systems with an adjustable transfer belt. The transfer belt transfers toner images from a first location to a second location. Two or more support rolls position and drive the transfer belt. A tensioning device is operatively connected to one of the support rolls. The tensioning device moves the support roll between a first position that places a first amount of tension on the belt, and a second position that places a lesser second amount of tension on the belt. The support roll is in the first position during image formation, and in the second position during non-image formation such as storage and shipping.