Web End Securing via Adhesive Application on Pope Roller

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Solution Overview

Problem

In the paper industry, web ends can move freely during drum changes, leading to tears and potential damage, and unintentional winding with different paper webs, resulting in rejects.

Innovation Solution

A method and device that apply adhesive to the web end as it passes between a Pope roller and a second drum, ensuring secure attachment to the first drum, using a water-soluble adhesive like modified starch, applied at specific angles and distances to prevent release and displacement, with an adhesive applicator positioned behind the nip to minimize contamination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive is applied to the web end, then web end security and web integrity are improved, but adhesive contamination and cleanup requirements worsen

Engineering Contradiction:

Improveweb end securityVSAvoidadhesive contamination

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The adhesive application system targets only the specific region of the web end that requires securing, rather than applying adhesive broadly. The applicator is positioned to deposit adhesive precisely where the web end contacts the drum surface, minimizing unnecessary adhesive application and resulting contamination.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The Pope roller serves as an intermediary component that facilitates controlled adhesive application. The roller transfers adhesive from the applicator to the web end in a controlled manner, ensuring adhesive is applied only where needed and reducing overall contamination while maintaining effective web end securing.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If adhesive is applied at a larger angle to the web end, then adhesive coverage and bonding strength are improved, but adhesive exposure and contamination worsen

Engineering Contradiction:

Improveadhesive bonding strengthVSAvoidadhesive exposure

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The system optimizes the adhesive application angle as a critical parameter, setting it within the specific range of 1° to 30° relative to the web end direction. This parameter optimization achieves effective bonding strength while minimizing adhesive exposure and contamination, representing a balanced parameter setting that satisfies both bonding requirements and contamination reduction.

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

The adhesive effectively secures the web end to the drum, preventing tears and miswinding, reducing rejects by maintaining web integrity during drum changes and minimizing adhesive exposure.

Implementation Method 1

has adhesive (2) applied to it and is wound onto the first drum (11). The application of the adhesive preferably prevents a release of the existing tensile stress of the paper web after the separation, and a lateral displacement of the topmost layers of the paper web.

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Data Source

PatentUS10604368B2Apparatus and method for securing an end of a strip to a tambour

Publication Date: 2020.03.31 PAPRIMA IND

AI summary

A method for securing a web end of a paper web on a first drum during a change of drum, the method includes passing the web end through a nip between a Pope roller and the second drum and applying adhesive to an area of the web end on a downward-rotating area of the Pope roller after the web end is passed through the nip.