Toner Transfer Modulator for Selective Disruption

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Solution Overview

Problem

Existing image forming devices lack the ability to selectively disrupt the transfer of toner from the developing roller to the photoreceptor during active operations, limiting user flexibility for testing, maintenance, or status checks.

Innovation Solution

Incorporation of a toner transfer modulator, such as a light shutter or diverter, within the cartridge that can move between different positions to either block or allow light to reach the photoreceptor, or to redirect toner, thereby controlling and disrupting the toner transfer process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a toner transfer modulator is incorporated into the cartridge to enable selective disruption of toner transfer, then user flexibility for testing and maintenance is improved, but device complexity increases

Engineering Contradiction:

Improveuser flexibility for testing and maintenanceVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The toner transfer modulator serves multiple functions: it acts as a light shutter to block light during testing, as a diverter to redirect toner during maintenance, and as a controllable element for status checks. This multi-functionality allows a single component to address various operational needs without proportionally increasing complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The modulator acts as an intermediary element between the light source and photoreceptor, and between the toner transfer path and the photoreceptor. By introducing this intermediate controllable component, the system gains selective disruption capability while isolating the complexity to a single manageable element

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the toner transfer modulator is moved between different positions to control toner transfer, then operational control is improved, but ease of operation deteriorates due to additional control mechanisms required

Engineering Contradiction:

Improveoperational controlVSAvoidcontrol mechanisms

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The modulator is designed to be movable between different positions (blocking position and non-blocking position) rather than fixed. This dynamic capability allows the system to adapt its operation mode as needed, providing operational control while the movement mechanism itself remains a simple mechanical adjustment

Inventive Principle:

Principle #15Dynamics

3Reliability

If the light shutter blocks light from reaching the photoreceptor, then toner transfer disruption is achieved, but light intensity reaching the photoreceptor decreases

Engineering Contradiction:

Improvetoner transfer disruptionVSAvoidlight intensity reaching photoreceptor

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The light shutter provides selective blocking of light to specific areas of the photoreceptor surface. Rather than uniformly reducing light intensity across the entire photoreceptor, the shutter can block light only in regions where toner transfer disruption is needed, maintaining normal light intensity in other regions

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables selective disruption or normal transfer of toner during image forming operations, providing users with the flexibility to perform tests, maintenance, or status checks without interrupting normal printing operations.

Implementation Method 1

a light shutter moveable between a blocking position in which the light shutter blocks light of a light source from reaching an outer surface of the photoreceptor and a non-blocking position in which the light shutter allows light of the light source to reach the outer surface of the photoreceptor

Methodology Applied

Scientific EffectLight blocking: Absorption (EM radiation)

Implementation Method 2

a photoreceptor to form an electrostatic latent image on the photoreceptor

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Implementation Method 3

a developing device in the cartridge including a developing roller. During operation of the image forming device, a layer of toner on an outer surface of the developing roller is conveyed to a supply region facing the photoreceptor

Methodology Applied

Scientific EffectElectrostatic attraction: Electrostatics

Data Source

PatentUS12313986B2Toner transfer modulators

Publication Date: 2025.05.27 HEWLETT PACKARD DEVELOPMENT COMPANY LP

AI summary

An apparatus includes a developer and a moveable support that is moveable in response to actuation by an image forming device. The apparatus further includes a toner transfer modulator on the moveable support, the toner transfer modulator moveable with the moveable support between different positions to differently affect transfer of a toner to a photoreceptor or a transfer member, where the moveable support is to move the toner transfer modulator to a first position to disrupt the transfer of the toner to the photoreceptor or the transfer member during an image forming operation of the image forming device.