Transfer Belt Memory Segmentation for Wear Calculation
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Solution Overview
Problem
The existing image forming apparatuses fail to accurately calculate the deterioration of the transfer belt due to not considering the rotational speed of the cleaning roller during the cleaning process.
Innovation Solution
The apparatus includes a transfer belt unit with a cleaning roller that rotates at two speeds, with separate storage areas for the first and second rotation time periods in the belt memory, allowing for accurate calculation of the transfer belt's deterioration based on these periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cleaning roller rotates at variable speeds depending on transfer belt status, then cleaning effectiveness is improved, but deterioration quantity calculation accuracy deteriorates when only total rotation time is recorded
Solution Approach 1:
The patent segments the rotation time recording into two distinct storage areas: first rotation time period storage for low-speed rotation and second rotation time period storage for high-speed rotation. This segmentation allows the system to separately track time spent at each speed level, enabling accurate deterioration calculation that accounts for the different impacts of varying rotation speeds on transfer belt wear.
2Device complexity
If only total rotation time period is stored in belt memory, then device complexity is reduced, but deterioration quantity calculation accuracy deteriorates
Solution Approach 1:
The patent adds a dimensional aspect to the time recording by creating separate storage dimensions (first storage area and second storage area) for different rotation speed conditions. This dimensional approach allows the system to maintain relatively simple memory structures while capturing the nuanced impact of variable rotation speeds on transfer belt deterioration, thereby improving calculation accuracy without significantly increasing overall system complexity.
Data Source
AI summary
A transfer belt unit for use with an image forming apparatus includes: a transfer belt; and a belt memory. The transfer belt is configured to transfer toner on a photosensitive drum of the image forming apparatus onto a sheet conveyed to a portion between the photosensitive drum and the transfer belt. The transfer belt is also configured to make contact with a cleaning roller of the image forming apparatus and to be cleaned by the cleaning roller. The belt memory includes: a first storage area configured to store therein a first rotation time period indicating a total of a period of time that the cleaning roller rotates at a first rotational speed; and a second storage area configured to store therein a second rotation time period indicating a total of a period of time that the cleaning roller rotates at a second rotational speed faster than the first rotational speed.