Paper Protection Element with Tubular Reinforcement for Door Leaf Corners

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Solution Overview

Problem

Existing paper protection methods for door leaves are either inadequate in preventing damage from sideways falls or are costly and environmentally unfriendly due to the use of plastic materials and complex assembly processes.

Innovation Solution

A paper protection element comprising box-shaped paper bodies with tubular structures and diagonal reinforcements, manufactured from a single flat paper blank, providing corner and edge protection without the need for gluing or metal joining, and allowing for easy application, removal, and biodegradable disposal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If plastic or synthetic covers with corner inserts are used for protection, then protection reliability is improved, but manufacturing cost and device complexity increase

Engineering Contradiction:

Improveprotection reliabilityVSAvoidpackaging structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The packaging solution is divided into multiple identical modular units, each protecting one corner of the door leaf. Each module consists of a paper body with an integrated tubular reinforcement element, allowing independent manufacturing and assembly while maintaining overall protection reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The protection element combines paper material with integrated tubular reinforcement structures to create a composite protective component that achieves the protection reliability of plastic materials while using environmentally friendly and cost-effective paper-based construction

Inventive Principle:

Principle #40Composite materials

2Reliability

If plastic packings with multiple parts are used, then protection reliability is improved, but ease of operation deteriorates due to complex assembly and disassembly

Engineering Contradiction:

Improveprotection reliabilityVSAvoidassembly and disassembly ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Multiple functional elements (protective body, tubular reinforcement, corner insert) are merged into a single integrated paper protection element that can be applied as one unit, eliminating the need to handle and assemble multiple separate plastic components

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The paper-based protection element is designed as a disposable single-use component that can be quickly applied and removed without the need for complex fastening mechanisms, reducing operational complexity while maintaining adequate protection for the shipping lifecycle

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If plastic packings are used, then protection reliability is improved, but environmental harm increases due to pollution and disposal costs

Engineering Contradiction:

Improveprotection reliabilityVSAvoidenvironmental pollution

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The material composition parameter is changed from synthetic plastic to paper-based materials, fundamentally altering the environmental characteristics while maintaining the protective function. This substitution eliminates the persistence and pollution issues associated with plastic disposal

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The paper protection element is designed for easy disposal through conventional waste streams, replacing plastic materials that require specialized recycling procedures. The paper material can be discarded with regular packaging waste without creating long-term environmental pollution

Inventive Principle:

Principle #34Discarding and recovering

4Ease of manufacture

If paper protection elements are used, then manufacturing cost is reduced, but protection reliability deteriorates when leaf falls sideways

Engineering Contradiction:

Improvemanufacturing costVSAvoidprotection reliability during falls

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

Tubular reinforcement structures are pre-formed and integrated into the paper protection element during manufacturing, providing enhanced structural strength before the product is shipped and used. This preliminary strengthening ensures the element can withstand impact forces from sideways falls

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The combination of paper material with integrated tubular reinforcement creates a composite structure that maintains the low manufacturing cost and environmental benefits of paper while achieving the impact resistance typically associated with more expensive plastic materials

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP4019426B1Paper protection element for a plate body, in particular a door leaf, and blank for manufacturing this paper element

Publication Date: 2023.10.25 BERTOLOTTO CLAUDIO

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AI summary

A door leaf (1) is protected by means of a packing (2) having, for each corner (7) of the leaf (1), a respective paper protection element (10), which delimits an outward open cavity (8) for the insertion of a peripheral corner portion (P) of the leaf (1) and has two flat side walls (11), which face and are parallel to one another, a bottom wall (12), which is connected to the side walls (11) in an integral manner, and a base wall (13); the base wall (13) being connected to the side walls (11) and to the bottom wall (12) and being a quadrangular tubular wall reinforced with diagonal reinforcements (22).