Printing Apparatus Ink Management with Forced Charging
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Solution Overview
Problem
Existing printing apparatuses face challenges in continuous operation due to the burden of frequent memory unit replacements and potential ink information loss during errors, leading to disrupted printing and increased user burden.
Innovation Solution
A printing apparatus with a slot for attaching and removing a memory unit that updates estimated ink amount information and allows for a forced charging process, enabling continuous printing and reducing errors by associating actual and estimated ink consumption, with user and maintenance interface options for managing ink usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the memory unit is replaced frequently to maintain continuous printing, then printing continuity is improved, but user burden increases
Solution Approach 1:
The system performs preliminary actions by automatically writing consumed ink amount information to the memory unit before the main unit-side total consumed ink amount exceeds the second threshold WTH2. This advance writing prevents the need for frequent memory unit replacements, allowing continuous printing without user intervention until the ink actually runs out.
Solution Approach 2:
The printing apparatus performs self-service by automatically managing the memory unit writing operations without requiring user intervention. The system monitors consumed ink amount and autonomously updates the memory unit, eliminating the need for users to manually replace memory units during normal operation.
2Productivity
If ink amount information is stored in the printing apparatus main unit, then continuous printing is enabled, but information loss during errors renders stocked ink unusable
Solution Approach 1:
The system extracts the consumed ink amount information from the main unit's volatile memory and writes it to the memory unit's non-volatile storage. This separation ensures that even if the main unit experiences an error or power loss, the ink consumption information is preserved in the memory unit, preventing loss of stocked ink usability.
Solution Approach 2:
The system provides beforehand cushioning by maintaining duplicate records of consumed ink amount in both the main unit and the memory unit. This redundancy acts as a protective measure against information loss during errors, ensuring that ink amount information is retained even if one storage location fails.
3Manufacturing precision
If the memory unit is set to invalid state after exceeding threshold, then data integrity is maintained, but printing operations stop before ink actually runs out
Solution Approach 1:
The system performs preliminary writing of consumed ink amount information to the memory unit before the main unit-side total consumed ink amount exceeds the second threshold WTH2. This advance writing ensures that data is preserved in non-volatile storage while allowing printing operations to continue based on the actual ink level in the ink tank, not the threshold value.
Data Source
AI summary
A printing apparatus includes a slot to and from which a memory unit storing permitted usage amount information can be attached and removed, and a processing unit that carries out a process for updating estimated ink amount information that is information for estimating an amount of the ink in an ink holding unit. When the memory unit is attached to the slot, the processing unit carries out a charging process that updates the estimated ink amount information using the permitted usage amount information in the memory unit, on the basis of a process for determining whether or not consumed ink amount expressed by the estimated ink amount information exceeds a prescribed threshold (WTH). The processing unit executes forced charging process that executes the charging process in the case where there is an instruction from an operator of the printing apparatus before the prescribed threshold WTH is exceeded.