Print Job Tray Selection via Sheet Detection
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Solution Overview
Problem
Conventional printing systems require users to physically check and manage sheet trays, as they need to know the types of sheets accommodated in each tray, which is inconvenient, especially when printing with sheets not currently available or when the user is unaware of the tray contents.
Innovation Solution
A printing system with a personal computer and printer connected via a network, where the system generates two types of print jobs: GT-designation and PT-designation jobs, allowing users to either specify the sheet tray during job generation or designate it at the printer, enabling flexible sheet tray selection and reducing the need for manual tray management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the print job includes a command designating a sheet tray, then the printing can be executed automatically without user intervention, but the user must know which sheet trays contain which sheet types and physically manage the trays
Solution Approach 1:
The printing apparatus automatically detects the presence and types of sheets in each sheet tray using sheet detection means, and the control unit automatically selects an appropriate sheet tray based on the print job requirements without requiring user intervention. This self-service mechanism resolves the contradiction by eliminating the need for users to manually manage sheet trays while maintaining automatic printing execution.
Solution Approach 2:
The sheet detection means provides feedback information about the current state of sheet trays (which trays contain which sheet types) to the control unit. This feedback loop enables the system to automatically adapt its sheet tray selection based on real-time conditions, resolving the contradiction between automatic execution and management complexity by providing the system with the information it needs to make autonomous decisions.
2Adaptability or versatility
If the user designates the sheet tray at the printing apparatus, then the user can select from available sheets, but the user must physically check each tray to know what sheets are available
Solution Approach 1:
The sheet detection means continuously or preliminarily detects and stores information about the types of sheets present in each sheet tray before the user needs to make a selection. This preliminary detection eliminates the need for users to physically check each tray at the moment of printing, resolving the contradiction by providing sheet availability information in advance.
Solution Approach 2:
The control unit acts as an intermediary between the user and the sheet trays. Instead of requiring the user to directly check each tray, the control unit uses the sheet detection means to gather information about available sheets and presents this information to the user through the operation unit, allowing the user to make an informed selection without physical inspection.
3Ease of operation
If the system provides automatic sheet tray selection, then user convenience is improved, but the system requires additional detection and control mechanisms
Solution Approach 1:
The sheet detection means serves multiple functions: it detects the presence of sheets, identifies sheet types, and provides this information to the control unit for both automatic selection and user-assisted selection modes. This multi-functionality resolves the contradiction by achieving automatic selection capability without requiring separate dedicated components for each function.
Data Source
AI summary
An image processing apparatus includes a communication unit configured to communicate with a printing apparatus, and a first controller configured to generate a first print job designating one of a plurality of sheet trays of the printing apparatus, and a second print job not designating any one of the plurality of sheet trays of the printing apparatus. A printing apparatus includes an image forming unit, an operation unit, and a second controller configured to determine whether a print job received from the image processing apparatus is the first print job or the second print job. When the first print job is received, the second controller controls the image forming unit to execute the first print job using the sheet tray designated by the first print job, while when the second print job is received, it is executed using a sheet tray designated through the operation unit.