Image Forming Device Tray Access Control
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Solution Overview
Problem
Multifunction peripherals lack effective security measures to manage and control access to sheet feed trays, leading to unauthorized use and economic losses, as users can inadvertently print on or access high-grade sheets, and existing lock systems are insufficient for preventing theft and misuse.
Innovation Solution
An image forming device with a print permitting/forbidding control unit and a sheet feed tray open/close permitting/forbidding control unit that allow settings to differ for each user based on tray, sheet size, and sheet type, enabling secure management and access control through user authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical locks are installed on sheet feed trays to prevent unauthorized access, then security against theft is improved, but sheets can still be fed from locked trays and the system becomes more complex
Solution Approach 1:
The patent replaces mechanical lock systems with an electronic control system that uses authentication (user IDs) to control tray access. The control unit electronically determines whether a user can access a specific tray based on their authentication, eliminating the need for physical locks while maintaining security. This substitution resolves the contradiction by providing security without the complexity of mechanical locking mechanisms.
2Ease of operation
If display screens show sheet sizes for expensive sheets in sheet feed trays, then users can identify sheet locations, but third parties can also tell where expensive sheets are located reducing security
Solution Approach 1:
The patent applies different display qualities to different users based on their authentication. Authorized users see detailed information including sheet sizes and tray locations, while unauthorized users see obscured or generic information. This local differentiation of information quality resolves the contradiction by providing ease of operation for legitimate users while maintaining security against unauthorized access.
3Productivity
If multifunction peripherals have basic tray access control, then simple printing operations are maintained, but sophisticated sheet management and budget control per division are insufficient
Solution Approach 1:
The patent creates a multi-functional authentication and control system that handles multiple purposes: authentication, tray access control, sheet type verification, budget management, and detailed logging. This universal system resolves the contradiction by maintaining simple printing operations for basic functionality while providing sophisticated sheet management capabilities for different divisions and users through the same integrated control mechanism.
4Reliability
If user authentication and detailed control settings are implemented, then security and sheet management are improved, but system complexity and operation procedures increase
Solution Approach 1:
The patent merges multiple control functions (authentication, tray access, sheet type verification, budget checking) into a single integrated control unit that processes user IDs. This consolidation resolves the contradiction by providing comprehensive security and sheet management through one unified system rather than multiple separate mechanisms, reducing overall system complexity while maintaining robust control.
Data Source
AI summary
Included is a print permitting/forbidding control unit configured to decide actual permitting/forbidding regarding printing regarding each of sheet feed trays, based on any one of, or a combination of any two or more of, settings of permitting/forbidding printing with regard to each sheet feed tray, setting's of permitting/forbidding printing with regard to each sheet size, and settings of permitting/forbidding printing with regard to each sheet type. At least part of settings used by the print permitting/forbidding control unit to decide actual permitting/forbidding regarding printing, out of the settings of permitting/forbidding printing with regard to each sheet feed tray, settings of permitting/forbidding printing with regard to each sheet size, and settings of permitting/forbidding printing with regard to each sheet type, can be made to differ for each user.