Axial Holder with Rounded Edges for Safe Paper Web Dispensing
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Solution Overview
Problem
Existing packaging material dispensers pose risks of injury and material damage for untrained personnel due to improper handling, as they lack ergonomic design features that prevent collisions and tears during the insertion and drawing of paper web rolls.
Innovation Solution
A device with a receptacle and axial holder featuring a funnel-like inner guide contour, axial recesses, and a dispensing opening that tapers to reduce the risk of injury and material damage, allowing for easier access and tear-off of packaging material without sharp edges or metal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional packaging material dispenser with a conical dispensing funnel and toothed ring is used, then the device structure is simple and easy to manufacture, but inexperienced personnel may sustain injuries from sharp edges and collisions during operation
Solution Approach 1:
The axial holder features continuously rounded corners and edges throughout its structure, replacing sharp geometric features with curved surfaces. This eliminates collision risks and injury hazards while maintaining the functional dispensing capability, directly resolving the safety issue for untrained personnel without adding complex mechanisms
Solution Approach 2:
The device employs a single-use plastic axial holder that is discarded after one use, eliminating the need for durable metal components with sharp edges. This disposable approach inherently removes safety hazards associated with reusable sharp-edged components while keeping the overall device structure simple and cost-effective
2Ease of operation
If a conical dispensing funnel with constant diameter fastening sections is used, then the device is easy to manufacture, but the paper web may rip or tear off improperly during insertion and drawing
Solution Approach 1:
The axial holder features locally varied geometry with different section characteristics: a wider receptacle section for roll insertion, a tapered dispensing section for smooth paper web extraction, and rounded transition zones. This local differentiation optimizes handling at each stage while remaining manufacturable as a single injection-molded piece
Solution Approach 2:
Continuously rounded corners and edges throughout the axial holder structure, particularly at transitions between sections, prevent paper web snagging and tearing. The curved geometry guides the paper web smoothly through the dispensing process, eliminating rip risks without requiring complex multi-component assemblies
3Ease of operation
If sharp-edged components like toothed rings are used for tear-off aid, then the tear-off function is effective, but the risk of injury to hands and forearms increases
Solution Approach 1:
The single-use plastic axial holder replaces durable metal tear-off aids with a disposable component that provides sufficient tear-off functionality through its geometry alone. The rounded edges and structural design enable easy tearing without sharp edges, eliminating injury risk while maintaining functionality for the intended single use
Solution Approach 2:
The invention extracts and removes the toothed ring component entirely, relying instead on the geometric design of the axial holder itself to provide tear-off aid. This eliminates the harmful sharp-edged component while preserving the essential tear-off function through the holder's rounded structural features
Data Source
AI summary
A device for manually or mechanically producing a tubular packaging material of a paper web is wound to form a roll, which forms an internal cavity, from which the paper web can be drawn to form packaging material. The device includes a receptacle for at least partially circumferentially encompassing the roll and an axial holder for holding an end face of the roll. The axial holder has a wall, in which a dispensing opening for dispensing the packaging material in an axial dispensing direction is formed. The wall has an inner guide contour, which tapers in a funnel-like manner in the axial dispensing direction from the receptacle to the dispensing opening. The wall is provided with at least one front axial recess at a front end of the axial holder in the axial dispensing direction.