Continuous Web Image Formation Apparatus Paper Deviation Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image formation apparatuses using continuous paper, such as roll paper, face challenges in correcting paper deviations in the main scanning direction, leading to image displacement, especially when paper position changes during conveyance, and require costly special mechanisms or are not applicable to roll paper.
Innovation Solution
An image formation apparatus with a paper conveyance unit, deviation correction unit, paper position measurement unit, and control unit that measures and corrects paper position in real-time during both stop and conveyance operations, allowing for accurate image formation by adjusting the image formation position based on measured paper position data, and optionally releasing crimp in the conveyance unit to facilitate correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a special mechanism is used to correct paper displacement during conveyance, then image formation accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs a feedback mechanism where a sensor detects the actual position of the paper during conveyance, and this information is fed back to a controller that adjusts the image formation position accordingly. This closed-loop control system corrects paper displacement without requiring complex mechanical correction mechanisms, thereby maintaining image formation accuracy while avoiding increased device complexity.
Solution Approach 2:
The patent replaces complex mechanical correction mechanisms with a combination of sensing and control systems. Instead of using mechanical devices to physically adjust or correct paper position, the system uses sensors to detect position deviations and electronically adjusts the image formation positioning based on the detected information, substituting mechanical correction with electronic control.
2Manufacturing precision
If paper position is corrected during conveyance by releasing crimp, then paper position accuracy is improved, but paper conveyance becomes difficult and reliability decreases
Solution Approach 1:
The patent performs paper position detection and correction calculations before the image formation process begins. The system detects the paper position during conveyance, calculates the necessary correction amount, and pre-adjusts the image formation positioning so that when imaging occurs, the paper is already at the correct position. This eliminates the need to release crimp during conveyance, maintaining both position accuracy and conveyance reliability.
Solution Approach 2:
The patent introduces an intermediary calculation and control system between the paper conveyance mechanism and the image formation system. Instead of directly manipulating the paper position during conveyance by releasing crimp, the system uses sensor detection and control calculations as intermediaries to indirectly achieve position correction by adjusting the image formation positioning based on detected paper position information.
3Device complexity
If paper deviation is not corrected during conveyance, then device complexity is reduced, but image displacement occurs and manufacturing precision deteriorates
Solution Approach 1:
The patent implements a feedback system where a sensor continuously monitors the paper position during conveyance, and this position information is fed back to the control system. The control system uses this feedback to calculate and apply real-time corrections to the image formation positioning, ensuring accurate image formation without requiring complex mechanical correction mechanisms during the conveyance process itself.
Solution Approach 2:
The patent replaces the need for mechanical correction mechanisms during conveyance with an electronic control system. The system uses sensors to detect paper position and electronically adjusts the image formation positioning based on detected deviations, substituting mechanical correction with electronic positioning adjustment to maintain simplicity while achieving high precision.
Data Source
AI summary
An image formation apparatus includes: an image formation unit that forms an image on continuous paper; a paper conveyance unit that conveys the paper through a conveyance path; a deviation correction unit that corrects deviation of the continuous paper by moving the paper on the conveyance path in a paper feed intersecting direction; a paper position measurement unit that measures a paper position in the paper feed intersecting direction of the paper on the conveyance path; and a control unit that controls the image formation unit and the deviation correction unit, wherein during stop of a conveyance operation, the control unit moves the paper to a predetermined position in the paper feed intersecting direction by deviation correction by the deviation correction unit, and during the conveyance operation, the control unit decides an image formation position in a main scanning direction in the image formation.