Printing Device Reduced Material Usage Mode

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Solution Overview

Problem

Printing devices often run out of print material before a replacement cartridge arrives due to increased usage or delayed shipment, leading to interrupted printing operations.

Innovation Solution

The printing device enters a reduced print material usage mode, conserving print material by using less for each print job, thereby extending the life of the current cartridge until the replacement arrives.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the printing device continues to use the current cartridge at normal usage rate, then printing operations can proceed without interruption, but the cartridge will be depleted before the replacement arrives

Engineering Contradiction:

Improveprinting operation continuityVSAvoidprint material remaining in cartridge

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The system performs preliminary assessment of cartridge depletion risk by comparing projected usage against replacement arrival timing. Before the cartridge is actually depleted, the system proactively enters reduced usage mode to prevent the harmful state of running out of material mid-print-job.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the operational parameter of print material consumption rate by entering reduced usage mode. This parameter change reduces the depletion rate of the current cartridge, extending its effective service life to cover the period until replacement arrival.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If the printing device enters reduced print material usage mode, then the current cartridge will last longer, but printing speed and productivity decrease

Engineering Contradiction:

Improveprint material usage rateVSAvoidprinting speed

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The system dynamically adjusts the print material usage rate based on the remaining time until cartridge replacement. The reduction mode is not fixed but adapts to the specific depletion risk scenario, allowing optimization between material conservation and printing productivity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Instead of completely stopping printing or using extreme conservation measures, the system applies partial reduction to print material usage. This moderate action is sufficient to extend cartridge life while maintaining acceptable printing productivity.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If the printing device monitors and manages cartridge depletion projections, then replacement timing can be optimized, but system complexity increases

Engineering Contradiction:

Improvecartridge replacement timing accuracyVSAvoidusage projection and monitoring system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system continuously monitors actual print material usage and compares it against projected depletion rates. This feedback mechanism allows the system to adjust replacement timing predictions and activate reduced usage mode at the optimal moment, improving replacement timing accuracy.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The printing device autonomously performs depletion projections and manages its own cartridge replacement timing without external intervention. The system self-monitors usage patterns, calculates depletion rates, and automatically enters reduced usage mode to prevent depletion before replacement arrival.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS11995365B2Printing device entry into reduced print material usage mode

Publication Date: 2024.05.28 HEWLETT PACKARD DEVELOPMENT COMPANY LP

AI summary

Upon fulfillment of a replacement cartridge of print material, whether projected usage of a printing device will likely deplete a current cartridge of print material prior to anticipated arrival of the replacement cartridge is determined. Responsive to determination that the projected usage will likely deplete the current cartridge prior to the anticipated arrival of the replacement cartridge, the printing device is to enter a reduced print material usage mode during subsequent actual usage of the printing device.