Registration Belt Correction During Recording Medium Oscillation
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Solution Overview
Problem
In image forming apparatuses, the movement of a belt is affected by registration correction, leading to potential image quality issues due to the deviation of the recording medium, which is corrected by sandwiching it between registration rollers and oscillating in the medium width direction, causing interference with the belt.
Innovation Solution
The apparatus incorporates a medium oscillating mechanism and a belt correction mechanism, with sensing sections to rectify the position of the recording medium and belt in the medium width direction, using control devices for first and second rectification controls to minimize belt movement interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If registration correction is performed by oscillating the recording medium between registration rollers, then the deviation of the recording medium is corrected, but the belt is pulled and moved affecting image formation quality
Solution Approach 1:
A belt position correction mechanism is introduced as an intermediary component between the recording medium and the image formation belt. This mechanism detects belt position deviations caused by recording medium oscillation and actively corrects them, preventing the belt movement from affecting image formation quality while maintaining the benefits of registration correction
Solution Approach 2:
A feedback control system is implemented where the belt position is continuously monitored during recording medium oscillation. The detected position information is fed back to the belt position correction mechanism, which adjusts the belt position in real-time to compensate for movements caused by registration correction, thereby maintaining image formation quality
Data Source
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AI summary
An image forming apparatus (100) includes the following. A medium oscillating mechanism (34) oscillates the recording medium. A medium sensing section (33, SE2) senses a position of an end of the recording medium. A belt correction mechanism (55) is configured to correct a position of a belt. A belt sensing section (56) senses the position of the end of the belt. A control device (11) performs first rectification control in which the medium oscillating mechanism rectifies the end of the recording medium based on sensing by the medium sensing section, and second rectification control in which the belt correction mechanism rectifies the end of the belt based on sensing by the belt sensing section. The control device performs a correction to the second rectification control in a case in which the first rectification control is performed with the recording medium straddling both the medium oscillating mechanism and the belt.