Resist Roller Tilt Control for Accurate Paper Feed Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses face issues with tilted recording paper causing timing discrepancies in the supply to the image forming device, leading to improper image formation due to changes in the timing at which the recording paper reaches the resist roller.
Innovation Solution
An image forming apparatus with resist rollers that include a tilt detection sensor and a tilt mechanism to adjust the roller shafts' orientation and rotation speed based on detected paper tilt, ensuring appropriate timing for paper supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the roller shaft of the resist roller is tilted to correct paper tilt, then paper tilt correction is achieved, but the timing at which the paper reaches the resist roller changes, affecting supply timing to the image forming device
Solution Approach 1:
The system performs preliminary detection of paper tilt using a tilt detection sensor before the paper reaches the resist roller. Based on this detection, the roller shaft tilt mechanism is activated in advance to adjust the roller shaft orientation, and the rotation speed is pre-adjusted to compensate for the timing change, ensuring that the paper arrives at the image forming device at the correct timing despite the tilt correction
Solution Approach 2:
The tilt detection sensor continuously monitors the paper tilt status and provides feedback to the control system. The control system adjusts the roller shaft tilt angle and rotation speed based on this feedback, creating a closed-loop control system that maintains both proper paper alignment and timing synchronization with the image forming device
2Length of moving object
If the roller shaft is tilted upstream, then the distance between the resist roller and paper becomes shorter, but the paper reaches the resist roller faster, disrupting timing synchronization
Solution Approach 1:
When the roller shaft is tilted upstream, the system changes the rotation speed parameter of the resist roller to compensate for the reduced distance. The control system calculates the required speed adjustment based on the tilt angle and distance change, increasing or decreasing the rotation speed to maintain the original timing synchronization with the image forming device
Data Source
AI summary
A controller that corrects tilt of recording paper by rotating a rotation board on which a resist roller pair for feeding recording paper to an image forming device is provided about a support as a rotation axis, and tilting roller shafts of the resist roller pair upstream or downstream with respect to a transport direction, and another controller that corrects a rotation speed of the resist roller pair based on a direction and amount of tilt of the roller shafts are included.