MFP Feeding Control for Unauthorized Print Prevention
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Solution Overview
Problem
Conventional image forming apparatuses lack efficient control over print medium feeding and charging processes, leading to potential unauthorized use and inefficient printing operations.
Innovation Solution
A Multifunction Peripheral (MFP) system with a control unit that manages print job permissions, determines the start time of the first feeding stage based on the presence of a charging device, print job permissions, and the type of print job, ensuring that the print medium is fed only when necessary and authorized, thereby optimizing the printing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the print medium is fed continuously without checking charging status, then printing speed is improved, but unauthorized use and cost control deteriorate
Solution Approach 1:
The control unit determines the start time of the first feeding stage in advance by checking whether the charging device has charged the print medium before initiating the feeding process. This preliminary verification ensures that only authorized and properly charged media are fed, preventing unauthorized use while maintaining efficient printing operations.
2Ease of operation
If the start time of feeding is fixed, then operation simplicity is improved, but adaptability to different charging states and media types deteriorates
Solution Approach 1:
The start time of the first feeding stage is dynamically adjusted by the control unit based on the charging status of the charging device, the permission status of the print job, and the type of print job. This dynamic adjustment allows the system to adapt to different conditions automatically while maintaining simple operation for the user.
3Productivity
If the first feeding stage starts before charging is complete, then printing efficiency is improved, but media quality and printing reliability deteriorate
Solution Approach 1:
The control unit continuously monitors the charging status of the charging device and uses this feedback information to determine the appropriate start time for the first feeding stage. This feedback mechanism ensures that feeding only begins when the print medium has been properly charged, maintaining media quality and printing reliability while optimizing efficiency.
Data Source
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AI summary
An image forming apparatus (10) comprises a printing unit (24), a drawing data generating circuit (17a), and a medium feeding circuit (17b). The drawing data generating circuit (17a) is adapted to generate, based on print data, drawing data that causes the printing unit (24) to execute a print job. The medium feeding circuit (17b) is adapted to feed the print medium (90) to the printing unit (24). The medium feeding circuit (17b) is adapted to execute: a first feeding stage in which the print medium (90) moves to a specific position; and a second feeding stage in which the print medium (90) moves from the specific position to the printing unit (24). The medium feeding circuit (17b), when the image forming apparatus (10) is in any one of specific states, starts the first feeding stage after the drawing data has been generated by the drawing data generating circuit (17a), and, when the image forming apparatus (10) is not in any one of the specific states, starts the first feeding stage before the drawing data has been generated by the drawing data generating circuit (17a).