Thermal Printer Static Discharge Bristles

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Solution Overview

Problem

Thermal printers face the challenge of static electricity buildup on substrates during the printing process, which can lead to damage to printer circuitry if not properly discharged, especially with substrates like vinyl that generate high static charges.

Innovation Solution

Incorporating static electricity discharge members, such as conductive bristles or brushes, electrically coupled to the internal ground of the printer, to contact and discharge static electricity from the substrate surfaces as they move through the print flow path, ensuring safe discharge levels below 8 kilovolts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If substrates move through the thermal printer during printing, then printing function is achieved, but static electricity builds up on substrate surfaces

Engineering Contradiction:

Improveprinting functionVSAvoidstatic electricity buildup

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful static electricity buildup into a beneficial discharge process by providing conductive bristles that safely conduct static charges to ground. The static electricity that naturally builds up during substrate movement is now channeled through a controlled path to ground, preventing damage while maintaining the printing function.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The conductive bristles serve as an intermediary element between the substrate surface and ground. These bristles make contact with the substrate and provide a controlled conductive path for static electricity to discharge safely to ground, mediating the harmful interaction between substrate movement and static charge accumulation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If static electricity is discharged to ground, then substrate safety is improved, but printer circuitry may be damaged by high voltage discharge

Engineering Contradiction:

Improvesubstrate static chargeVSAvoidprinter circuitry safety

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent implements a discharge path with ground connection that acts as a cushioning mechanism before static electricity can reach harmful voltage levels. The conductive bristles and ground connection prepare a safe discharge route in advance, preventing static charge from building up to levels that could damage printer circuitry.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The potentially harmful high-voltage static discharge is converted into a beneficial controlled discharge process. By providing a dedicated ground path through conductive bristles, the system safely dissipates static electricity before it can reach levels dangerous to printer electronics, turning a harmful phenomenon into a protective mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If conductive bristles contact substrate surface, then static electricity is discharged, but bristle wear occurs over time

Engineering Contradiction:

Improvestatic discharge effectivenessVSAvoidbristle service life

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The conductive bristles are designed as replaceable, relatively inexpensive components that can be periodically replaced as they wear. This approach accepts that the bristles have limited service life but maintains system reliability by allowing easy replacement of these simple, low-cost components rather than designing for indefinite bristle life.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent may utilize bristles with varying degrees of conductivity or different material properties to optimize the balance between discharge effectiveness and wear resistance. By adjusting parameters such as bristle material composition, diameter, or conductivity, the system can optimize performance while managing wear characteristics.

Inventive Principle:

Principle #35Parameter changes

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

Effectively neutralizes static electricity on substrates, preventing damage to printer components and ensuring reliable operation by maintaining safe discharge levels, even with substrates prone to high static buildup.

Implementation Method 1

The static electricity discharge member is electrically coupled to the internal electrical ground and operable to discharge static electricity to the internal electrical ground to thereby neutralize the static electricity charge.

Methodology Applied

Scientific EffectElectrostatic discharge: Electrostatic Discharge

Data Source

PatentUS8477162B1Thermal printer with static electricity discharger

Publication Date: 2013.07.02 GURAFUITSUKU PURODAKUTSU

AI summary

A thermal printer, when operating under battery power, has an internal or battery ground. Static electricity is typically generated during normal operation of the printer. At least one static electricity discharge member is positioned in contact with a major surface of printing substrate at a location downstream from the location at which a thermal print head transfers ink from an ink transfer ribbon to the substrate. The at least one static electricity discharge member is electrically coupled to the internal ground so as to discharge static electricity build up that can otherwise damage electronic components of the printer.