Transport Section Pressure Control for Image Damage Prevention
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Solution Overview
Problem
Post-processing apparatuses sometimes damage images on sheets due to high-pressure contact during transport, especially when the transport time is short and the image is not fully dry.
Innovation Solution
A post-processing apparatus with a controller that adjusts the pressure of the transport section based on processing information, such as transport time and recording concentrations, to match the state of the medium, reducing the risk of image damage by using a position change section to control the relative position and pressure of the transport section with respect to the processing tray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transport section makes contact with the upper surface of the sheet with high pressure to ensure reliable transport, then the transport reliability is improved, but the image on the sheet may be damaged
Solution Approach 1:
The transport section's pressure is made dynamically adjustable rather than fixed. The position change section modifies the relative position between the transport section and processing tray, thereby dynamically changing the contact pressure during transport based on real-time conditions
Solution Approach 2:
The contact pressure parameter of the transport section is changed based on processing information. The controller adjusts the pressure parameter by controlling the position change section to modify the relative position, adapting the pressure to match the state of the medium (e.g., drying time, liquid concentration)
2Productivity
If the transport time is shortened to increase productivity, then the processing efficiency is improved, but the image may not be fully dry and becomes more susceptible to damage
Solution Approach 1:
The contact pressure parameter is adjusted based on the transport time and drying state of the image. When transport time is short and the image is not fully dry, the controller reduces the pressure by controlling the position change section, thereby preventing damage while maintaining short transport times for high productivity
Data Source
AI summary
A post-processing apparatus includes a first discharge section configured to discharge a medium having thereon information recorded by a recording section, a processing tray configured to be loaded with the medium discharged by the first discharge section, an edge alignment section disposed on the processing tray, a transport section making contact with an upper surface of the medium mounted on the processing tray and configured to transport the medium to the edge alignment section, a position change section configured to change a relative position of the transport section with respect to the processing tray, and a controller configured to change pressure of when the transport section presses the medium by controlling the position change section, and a post-processing section configured to perform post-processing on the medium on the processing tray, wherein the controller changes the pressure based on processing information regarding processing to be performed on the medium.