Printer Drying Unit Medium Transport During Maintenance
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Solution Overview
Problem
Existing printing apparatuses face challenges in reducing size and cost while maintaining printing efficiency, as they require large devices to separate the recording medium from the heater, leading to inefficiencies in restarting printing and increased risk of thermal damage to the medium.
Innovation Solution
A printing apparatus design that includes a drying unit with a bring-in and bring-out port, where the medium is transported towards the bring-out port during temporary stops, reducing its time in the drying unit and avoiding excessive heating, and incorporates a transporting unit for intermittent movement, allowing for efficient restarting of printing without the need for large separation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the recording medium is separated from the heater to prevent excessive heating during printing stop, then thermal damage is prevented, but the apparatus size increases and cost increases
Solution Approach 1:
The patent extracts the medium from the heater during printing stop by transporting it out of the drying unit through the transport unit. This separation prevents thermal damage without requiring complex mechanical separation devices, as the transport unit already exists for medium feed. The medium is moved to a standby position where it is no longer exposed to heating, resolving the contradiction between preventing thermal damage and maintaining simple apparatus structure.
Solution Approach 2:
The patent implements dynamic control of medium position relative to the heater. During printing operation, the medium remains in the drying unit for heating; during printing stop, the medium is dynamically transported out of the drying unit. This dynamic repositioning allows the same apparatus structure to serve multiple functions (heating during print, protection during stop) without adding permanent separation mechanisms, thus preventing thermal damage while maintaining apparatus compactness.
2Loss of energy
If the heater is stopped during printing interruption, then energy consumption is reduced, but printing efficiency deteriorates due to reheating time required
Solution Approach 1:
The patent applies preliminary action by transporting the medium out of the drying unit before the printing stop is fully executed. This timing ensures that when printing resumes, fresh medium can be immediately fed into the drying unit without waiting for heater reheat, as the transport unit can quickly replenish medium from the standby position. This preliminary medium preparation maintains printing efficiency while allowing the heater to be stopped during the interruption period.
Solution Approach 2:
The patent maintains continuity of useful action by keeping the transport unit operational during printing interruptions. While the heater is stopped to save energy, the transport unit continues to move medium in and out of the drying unit, ensuring that medium flow is not interrupted. This continuous medium transport prepares the system for immediate printing resumption, reducing the impact of heater stoppage on overall printing efficiency.
3Device complexity
If the medium remains in the drying unit during printing stop, then apparatus structure is simplified, but thermal damage occurs due to excessive heating
Solution Approach 1:
The patent introduces the transport unit as an intermediary mechanism between the medium and the drying unit. Rather than requiring the medium to physically separate from the heater through complex mechanical means, the transport unit mediates by controllably moving medium into and out of the heating zone. This intermediary transport function allows simple apparatus structure while effectively preventing thermal damage through controlled medium positioning during printing stops.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances printing efficiency by minimizing thermal damage and reducing apparatus size and cost, enabling quick restarts and maintaining print quality.
Implementation Method 1
a drying unit which includes a bring-in port where a medium is brought in and a bring-out port where the medium is brought out, and dries ink applied onto the medium
Data Source
AI summary
A printing apparatus includes a drying unit that includes a bring-in port where a medium is brought in and a bring-out port where the medium is brought out, and dries ink applied onto the medium, and in a case in which printing is temporarily stopped and a predetermined maintenance work is performed, the medium is transported in a transporting direction which is a direction toward the bring-out port from the bring-in port in a maintenance work period from starting of the maintenance work to finishing of the maintenance work or in a partial period of the maintenance work period.