Movable Contacted Member for Paper Misregistration Correction
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Solution Overview
Problem
Image forming devices face challenges in accurately adjusting the timing and attitude of medium transportation, leading to potential misregistration and reduced productivity due to the need for increased movement of transporting members or larger image recording parts to correct misregistration.
Innovation Solution
A medium transporting device with a movable contacted member, a line-up member, a displacement amount calculation unit, and a contacted position control unit that adjusts the position of the contacted member to correct misregistration, allowing for precise alignment and reduced movement of transporting members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the movement amount of transporting members is increased to correct misregistration, then the misregistration can be corrected, but the productivity decreases and the device complexity increases
Solution Approach 1:
The invention introduces a new dimension for misregistration correction by moving the contacted member in the medium width direction (lateral dimension) rather than increasing movement in the medium transporting direction (longitudinal dimension). This lateral adjustment of the contacted member allows precise positioning of the medium without requiring increased movement of transporting members, thus correcting misregistration while maintaining productivity.
Solution Approach 2:
The contacted member serves as an intermediary element between the medium and the transporting path. By adjusting the position of this intermediate contacted member in the medium width direction, the system can correct misregistration indirectly without requiring large movements of the primary transporting members, thereby resolving the contradiction between correction accuracy and productivity.
2Manufacturing precision
If the size of image recording parts is increased to correct misregistration, then the misregistration can be corrected, but the device complexity and cost increase
Solution Approach 1:
The invention makes the contacted member dynamically adjustable in the medium width direction based on detected misregistration amounts. This dynamic positioning capability allows the system to correct misregistration adaptively without requiring larger or more complex image recording parts, as the correction is achieved through flexible repositioning of the contacted member rather than increased system size.
3Manufacturing precision
If the movement of transporting members is increased to adjust medium timing and attitude, then the misregistration can be corrected, but the productivity decreases
Solution Approach 1:
Instead of adjusting medium timing and attitude by increasing movement in the transporting direction (time-consuming), the invention uses lateral movement of the contacted member in the medium width direction. This dimensional shift allows rapid attitude adjustment without affecting the transporting timeline, thus maintaining productivity while achieving precise alignment.
Data Source
AI summary
A medium transporting device includes: a transporting path; a contacted member that is provided on the transporting path to be movable in a medium width direction orthogonal to a medium transporting direction; a line-up member on the transporting path that lines up a position of the medium by sending the medium transported on the transporting path to the contacted member to bring the end of the medium in the medium width direction into contact with the contacted member; a displacement amount calculation unit that sets on a downstream side of the line-up member in the medium transporting direction, and calculates a misregistration amount of the medium in the medium width direction; and a contacted position control unit that controls a position of the contacted member by moving the contacted member in a direction of reducing the misregistration amount.