Roller with Undercut Groove for Web Spreading and Edge Control

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Solution Overview

Problem

Existing rollers for guiding and spreading webs of material lack functionality, particularly in confined spaces, and struggle to maintain web smoothness and prevent edge rolling and electrostatic charging.

Innovation Solution

A roller with a rotatable supporting body featuring axially displaceable slats and an undercut groove for a functional component, which can include ribs, brushes, or a sliding surface, to securely hold and manipulate the web, prevent edge rolling, and dissipate electrostatic charges.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a roller with axially displaceable slats is used for guiding and spreading web material, then the web guiding and spreading capabilities are improved, but the roller occupies too much space in confined areas

Engineering Contradiction:

Improveweb guiding and spreading capabilitiesVSAvoidroller space occupation

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The functional component is nested within the roller structure by placing it in an undercut groove that is radially overlapped by the slats receptacles. This allows the functional component to be accommodated within the existing roller footprint without requiring additional radial space, effectively nesting one functional element within another.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The functional component is positioned in a groove that extends in the radial direction, utilizing the radial dimension for component placement rather than requiring additional axial or circumferential space. This dimensional approach allows secure mounting while maintaining a compact overall roller size.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Device complexity

If the roller structure is simplified without additional functional components, then the device complexity is reduced, but the ability to prevent edge rolling and dissipate electrostatic charges is lost

Engineering Contradiction:

Improveroller structure complexityVSAvoidedge rolling and electrostatic charging

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The functional component is designed to perform multiple functions simultaneously: it provides mechanical support to prevent web edge rolling through its rib structure, and dissipates electrostatic charges through conductive elements. This multi-functionality allows a single component to address multiple harmful effects without proportionally increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The functional component acts as an intermediary element between the web material and the roller body, providing both mechanical intervention (ribs preventing edge rolling) and electrical intervention (conductive paths for charge dissipation) in a single integrated component.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the functional component is firmly connected to the supporting body, then the connection reliability is improved, but the space for accommodating the functional component is limited

Engineering Contradiction:

Improvefunctional component connectionVSAvoidfunctional component accommodation space

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

Inventive Principle:

Principle #7Nested doll (Nesting)

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

Enhances web guiding and spreading capabilities, ensures secure fixation in limited spaces, prevents edge rolling, and effectively dissipates electrostatic charges, ensuring smooth web processing.

Implementation Method 1

The rows of bristles can be arranged obliquely in the axial direction or similar to the ribs mentioned above. The at least one brush presses against the web of material and causes a frictional force that is dependent on the speed of the web of material.

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

The at least one functional component can also produce an electrically conductive connection between the web of material and the at least one supporting body. This is particularly important in the case of electrostatically chargeable, insulating webs of material, since surface charges can be easily dissipated in this way.

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentEP3786330B1Roller for guiding and/or stretching a moving sheet-like material

Publication Date: 2022.03.30 TEXMAG GMBH VERTRIEBS

Figure 1~2
Figure 3~4
Figure 5~6

AI summary

A roller (1) serves to guide and/or spread a moving web of material (2). The roller (1) has a support body (3) on which receptacles (4) for axially displaceable slats (5) are provided on the outside. These slats grip the web of material (2). To improve the functionality of this roller (1), at least one undercut groove (6) is formed on the support body (3) between at least two of the slats (5). This undercut groove (6) can accommodate at least one functional component (7).