Printing Apparatus Feeding Unit Selection Error Prevention
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Solution Overview
Problem
Users may inadvertently select the wrong feeding unit in printing apparatuses, leading to incorrect sheet feeding and potential printing errors.
Innovation Solution
The printing apparatus includes a control method and program that detects the last-operated feeding unit and displays a notification if a different unit is selected for printing, ensuring the user is aware of the intended feeding unit and preventing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple feeding units are provided in the printing apparatus, then the versatility and functionality are improved, but the risk of user error increases as users may inadvertently select the wrong feeding unit
Solution Approach 1:
The system implements feedback by detecting which feeding unit was last operated and comparing it with the currently selected feeding unit. When they differ, the system provides visual feedback through a notification on the display unit, alerting the user to the potential mismatch between their intended selection and the actual last-used feeding unit.
Solution Approach 2:
The system performs preliminary detection and comparison before the printing operation commences. By identifying the last-operated feeding unit in advance and comparing it with the current selection, the system prepares a warning notification that prevents user error before it occurs, rather than correcting it after the fact.
2Reliability
If the system provides notifications for feeding unit selection, then the reliability of printing operation is improved, but the device complexity increases due to additional detection and notification mechanisms
Solution Approach 1:
The control unit performs multiple functions: it manages the selection of feeding units, detects the last-operated feeding unit, compares selections, and controls the display unit. By consolidating these functions into a single control unit, the patent avoids the need for separate dedicated components for each function, thereby managing complexity while maintaining reliability.
Solution Approach 2:
The system uses its existing display unit to provide the notification, rather than introducing a separate alert mechanism. The display unit, already present for showing printing information and settings, is repurposed to also show feeding unit selection warnings, making the existing component serve multiple purposes.
Data Source
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Figure 3A~3B
AI summary
A printing apparatus includes feeding units, detecting means configured to detect a respective operation on each of the feeding units, designating means configured to designate which of the feeding units is to be used for printing, and control means configured to execute a process, in response to a command to execute predetermined printing, based on a first feeding unit on which an operation has been last detected and a second feeding unit designated by the designating means. When the first and second feeding units are different, a predetermined screen is displayed, as the process. When the first and second feeding units are the same, the predetermined printing is executed on a sheet fed from the second feeding unit, as the process.