Pump-less Toner Dispensing Cap with Valve Assembly

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Solution Overview

Problem

Conventional toner dispensing systems suffer from inaccuracies in dispensing precise amounts due to human error and mechanical limitations, such as wear and tear of pumps and poor sealing, leading to contamination and curing issues.

Innovation Solution

A cap and valve assembly with a movable valve that allows for precise control of toner flow using air pressure, coupled with an anti-drip mechanism to prevent spills and contamination, and an electronic scale for closed-loop feedback to ensure accurate dispensing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If conventional motorized toner dispensing apparatuses use pumps to control toner flow, then toner dispensing can be automated, but the pumps require periodic calibration and maintenance due to wear from abrasive pigments

Engineering Contradiction:

Improvetoner dispensing automationVSAvoidpump calibration stability

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The patent removes the pump mechanism entirely from the toner dispensing system. Instead of using a motorized pump to push toner out, the system uses a valve assembly that passively controls toner flow through pressure differentials and gravity, eliminating the moving pump parts that wear and require calibration.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the motorized pump system with a passive valve-based flow control mechanism. The valve assembly uses pressure differentials created by air pressure and gravity to control toner flow, substituting mechanical pumping with pressure-driven flow control that does not require calibration.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If conventional spouts are used for toner dispensing, then toner can be dispensed from containers, but poor sealing leads to dripping and contamination requiring periodic cleaning

Engineering Contradiction:

Improvetoner dispensing capabilityVSAvoiddripping and contamination

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent incorporates an anti-drip cap that is positioned to prevent dripping before it occurs. The cap includes a seal that engages with the spout outlet, creating a preliminary barrier against toner leakage and contamination, eliminating the need for post-contamination cleaning.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an anti-drip cap as an intermediary component between the spout and the external environment. This cap acts as a mediator that prevents direct contact between toner and the external environment, blocking dripping and contamination pathways while allowing controlled dispensing.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If manual pouring is used to dispense toner according to recipes, then flexibility is maintained, but human error leads to inaccurate pours especially when precise amounts are required

Engineering Contradiction:

Improvemanual dispensing flexibilityVSAvoidtoner amount accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent incorporates a scale-based feedback mechanism that monitors toner flow in real-time. The scale provides continuous feedback on the amount of toner dispensed, allowing the system to automatically adjust or stop dispensing when the target amount is reached, ensuring precision while maintaining operational flexibility.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual pouring with an automated valve-controlled dispensing system that uses pressure differentials and gravity to deliver precise toner amounts. The system maintains flexibility in dispensing timing and amount control while eliminating human error in measurement.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The system achieves high accuracy in dispensing toner amounts, preventing contamination and curing, and ensures precise mixing of toners according to recipes, improving the overall efficiency and reliability of the toner dispensing process.

Implementation Method 1

A cap and valve assembly with a movable valve that allows for precise control of toner flow using air pressure

Methodology Applied

Scientific EffectAir pressure: Pressure Increase

Data Source

PatentUS8453891B2Pump-less toner dispensing cap

Publication Date: 2013.06.04 3M INNOVATIVE PROPERTIES CO

AI summary

A valve assembly is disclosed comprising an elongate body comprising a lumen and an output aperture near a distal portion thereof, a plunger positioned in the lumen and movable to a first position and a second position, and a toner path formed at least partially within the lumen and extending from a toner input to a toner path end located proximate the output aperture. When the plunger is in the first position, the output aperture is not fluidly coupled to the toner path. When the plunger is in the second position, the outlet aperture is fluidly coupled to the toner path such that a toner in the toner path can exit the valve assembly.