Web material center-pull dispenser assembly
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Solution Overview
Problem
Existing towel and wipe dispensers often fail to provide adequate separation between adjacent towels or wipes, leading to waste due to improper dispensing, require two-handed interaction, and are prone to evaporation, especially when dispensing from a bulk roll, resulting in inefficient use and increased manufacturing costs.
Innovation Solution
A center-pull-through web material dispenser assembly with a rotatable and axially translatable restrictor plate that allows for adjustable dispense openings, enabling single-handed operation and customizable dispensing characteristics to ensure proper separation and minimize waste, featuring a housing with a base and cover that supports a roll of web material and includes a frustoconical passage for efficient dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple dispensing structure is used, then manufacturing costs are reduced, but adequate separation between adjacent towels or wipes cannot be provided
Solution Approach 1:
The dispensing structure is segmented into multiple functional components: a housing, a rotatable restrictor plate with multiple openings of different sizes, and a platform. This segmentation allows each component to perform a specific function while working together to achieve both cost-effectiveness and reliable separation. The restrictor plate's multiple openings provide different separation characteristics without requiring complex mechanisms.
Solution Approach 2:
The restrictor plate is made rotatable, allowing dynamic adjustment of which opening is aligned with the dispense passage. This dynamic element enables the system to adapt to different web material types and dispensing requirements without requiring multiple static structures, thereby maintaining manufacturing simplicity while achieving reliable separation.
2Device complexity
If a fixed dispense opening size is used, then device complexity is reduced, but adaptability to various web material types is limited
Solution Approach 1:
The restrictor plate serves multiple functions: it provides separation, controls dispensing characteristics, and adapts to different web material types. By incorporating multiple openings of different sizes in a single plate, the structure achieves universality without requiring multiple separate components, thus maintaining simplicity while enhancing adaptability.
Solution Approach 2:
The rotatable restrictor plate allows the user to dynamically select which opening size is active based on the web material type being dispensed. This dynamic selection capability provides versatility without requiring a complex system with multiple movable parts, as only one plate with multiple fixed openings is needed.
3Ease of operation
If sequential extraction from exterior surface is used, then dispensing operation is simplified, but evaporation and waste increase
Solution Approach 1:
Instead of extracting web material from the exterior surface sequentially, the system is configured to dispense from the core of the roll. The rotatable restrictor plate with its variously sized openings controls the extraction from the core, inverting the traditional dispensing approach. This inversion reduces the exposed surface area and minimizes evaporation while maintaining operational simplicity.
4Reliability
If two-handed interaction is required, then control over dispensing is improved, but ease of operation deteriorates
Solution Approach 1:
The rotatable restrictor plate is designed to be easily manipulated by a single hand, allowing the user to rotate and align the appropriate opening with the dispense passage using only thumb and finger movements. The system's geometry and component sizing enable single-handed operation while maintaining reliable control over the dispensing process.
Data Source
AI summary
A dispenser assembly and method of providing a web material dispenser assembly that is configured to dispense towel and wipe web materials, whether continuous or interwoven, in a pull-through manner from a core of a roll of material. The dispenser assembly includes a housing having a base and a moveable cover. A roll guide is disposed in the housing and defines a portion of the dispense passage associated with extraction of material from the dispenser assembly. A restrictor plate is supported by the roll guide and is rotatable and axially translatable relative thereto. The restrictor plate defines a number of dispense openings that can be selectively aligned with the portion of the dispense passage defined by the roll guide such that the characteristics associated with the pull-through dispense activity of the dispenser assembly can be quickly and conveniently configured to achieve a desired dispense action.