Portable Storage Usage Limit Management for Disconnected Printers

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Solution Overview

Problem

Central management of usage limits across multiple image forming apparatuses is challenging when some devices are not connected to a network, as existing technologies rely on network communication to track and enforce usage limits.

Innovation Solution

An apparatus with a reading unit to track usage from a portable storage medium, a use limiting unit to enforce limits based on predetermined values, and a writing unit to update and store these values locally on the medium, allowing for independent management of usage limits without network connectivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a server computer is used to centrally manage usage limits across multiple image forming apparatuses, then total upper limit management can be achieved, but the system becomes ineffective when some apparatuses are not connected to the network

Engineering Contradiction:

Improveusage limit management reliabilityVSAvoidadaptability to network-disconnected environments

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent divides the centralized usage limit management system into distributed components. Each image forming apparatus maintains its own usage limit information locally, and users carry portable storage media with their usage data. This segmentation allows the system to function independently at each device without requiring continuous network connectivity to a central server.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces portable storage media as an intermediary between the user and the image forming apparatus. The storage media carries usage limit information and is read/written by the apparatus, enabling data transfer and synchronization without requiring network connectivity. This intermediary solves the communication gap in disconnected environments.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If network communication is required for usage limit tracking, then centralized control can be maintained, but usage limit management becomes impossible for disconnected devices

Engineering Contradiction:

Improvecentralized control capabilityVSAvoidusage limit enforcement reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs preliminary actions by pre-loading usage limit information onto portable storage media before network disconnection occurs. The image forming apparatus reads and stores usage limit data locally, and updates are prepared in advance on the portable media. This allows the apparatus to enforce usage limits autonomously without real-time network communication.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Each image forming apparatus is equipped with the capability to independently read, store, and enforce usage limits from its own local storage or portable media, without requiring continuous assistance from a central server. The apparatus autonomously manages its usage limits, calculating remaining limits and preventing unauthorized usage based on locally stored data.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS9319550B2Apparatus, use limiting method, and storage medium

Publication Date: 2016.04.19 RICOH CO LTD

AI summary

An apparatus includes a reading unit that reads a first value indicating usage of the apparatus from a portable storage medium, a use limiting unit that updates the first value according to use of the apparatus and limits use of the apparatus when the updated first value reaches a predetermined value, and a writing unit that writes the updated first value into the portable storage medium.