Sheet Conveyor Conducting Member Static Dissipation

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Solution Overview

Problem

Static electricity buildup in sheet conveyors can lead to dust attraction in processing portions and sheet stacking failures due to sheets sticking together, degrading processing quality and causing stacking issues.

Innovation Solution

Incorporating a conducting member with a contact portion and discharge portion in the guide surface of the conveyor to dissipate static electricity, preventing its buildup on the guide surface and in the conveyor system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a guide surface is used to direct sheets in the conveyor path, then sheet guidance and direction are improved, but static electricity buildup occurs on the guide surface causing dust attraction and sheet stacking failures

Engineering Contradiction:
Improvesheet guidanceVSAvoidstatic electricity buildup
Core Design Contradiction:
Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The patent applies the principle of converting harm into benefit by using the conducting member to convert the harmful static electricity buildup into a beneficial discharge mechanism. The conducting member provides a controlled path for static electricity to dissipate safely, transforming the problematic static charge accumulation into a manageable electrical discharge that prevents dust attraction and sheet stacking failures while maintaining effective sheet guidance functionality.

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

Solution Approach 2:

The conducting member acts as an intermediary element between the guide surface and the ground. It provides a dedicated pathway for static electricity to travel from the guide surface through the conducting member to ground, mediating the harmful static charge accumulation and preventing it from affecting the sheet conveyance process. This intermediary structure allows the guide surface to maintain its guidance function while eliminating the static electricity problem.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Quantity of substance

If static electricity is allowed to build up on the guide surface, then electrical charge is generated for potential use, but dust is attracted to the processing portion and sheets stick to the stack portion degrading quality

Engineering Contradiction:
Improveelectrical chargeVSAvoidprocessing quality
Core Design Contradiction:
Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent applies the principle of extraction by removing the harmful aspect of static electricity (uncontrolled buildup and discharge) from the system. The conducting member extracts static charge from the guide surface and provides a controlled discharge path to ground, separating the useful electrical charge generation from the harmful dust attraction and sheet sticking effects. This allows the system to maintain electrical charge management without compromising processing quality.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The conducting member converts the harmful static electricity buildup into a beneficial controlled discharge mechanism. By providing a dedicated pathway to ground, it transforms uncontrolled static charge accumulation that causes dust attraction and sheet sticking into a managed electrical discharge that protects processing quality while still utilizing the electrical charge generation phenomenon.

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

3Object-generated harmful factors

If a conducting member is added to dissipate static electricity, then static electricity buildup is reduced, but device complexity increases

Engineering Contradiction:
Improvestatic electricity buildupVSAvoidconveyor structure
Core Design Contradiction:
Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies the principle of merging by integrating the conducting member into the existing guide surface structure. The conducting member is combined with the guide surface to form a unified component that performs both guidance and static electricity dissipation functions. This merging approach eliminates the need for separate, complex static control systems while effectively reducing static electricity buildup on the guide surface.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The conducting member serves multiple functions simultaneously: it acts as both a structural component of the guide surface and a static electricity dissipation pathway. This multi-functionality reduces overall device complexity by combining what could be separate components into a single integrated element that addresses both sheet guidance and static charge management.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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

Reduces static electricity-related issues such as dust attraction and sheet sticking, thereby improving processing quality and preventing stacking failures in the sheet conveyor system.

Implementation Method 1

a conducting member (60)

Methodology Applied
Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

a contact portion (63) configured to come into contact with a sheet (99) being conveyed from below

Methodology Applied
Scientific EffectElectrostatic discharge: Electrostatic Discharge

Data Source

PatentUS8991818B2Sheet conveyor device
Publication Date: 2015.03.31 BROTHER KOGYO KK
  • US8991818B2 patent drawing
  • US8991818B2 patent drawing
  • US8991818B2 patent drawing

AI summary

A sheet conveyor device includes a conveyor that conveys a sheet along a conveyance path in a conveying direction, a sheet stack portion that receives the sheet conveyed by the conveyor, and a conducting member. The conveyor includes an ejection roller that ejects the sheet to the sheet stack portion. The conducting member includes a contact portion, disposed along the conveyance path downstream of the ejection roller, which comes into contact with the sheet conveyed by the conveyor, and a discharge portion that discharges static electricity transferred to the contact portion by contact between the sheet and the contact portion.