Dispenser with tear unit
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Solution Overview
Problem
Conventional tissue paper dispensers have sharp tear means that can be unpleasant to touch and wear out over time, leading to inconsistent performance and unsuccessful tearing of the paper.
Innovation Solution
A dispenser with a tear unit featuring a friction surface covered with a thermoplastic elastomer containing rounded protrusions, which provides consistent and reliable tearing of both continuous and perforated paper webs, ensuring a soft touch and maintaining effectiveness even after wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sharp teeth-like tear means are used, then good rapture of the tissue paper is achieved, but the tear means become unpleasant to touch and wear out over time
Solution Approach 1:
The invention changes the geometric parameters of the tear means from sharp edges to rounded protrusions with specific dimensions (height 1-5mm, diameter 2-6mm). This parameter modification maintains the tearing function while eliminating the harmful sharpness, allowing the protrusions to effectively initiate paper tears through controlled friction without being unpleasant to touch.
Solution Approach 2:
The invention uses composite construction by combining a rigid support structure (tear unit body) with elastomeric material having specific hardness properties (Shore A 40-90). This composite approach provides both the structural integrity needed for repeated use and the softness required for pleasant user contact, while the elastomeric protrusions maintain consistent tearing performance.
2Reliability
If sharp tear means are used, then initial tearing performance is good, but effectiveness decreases over time due to wear
Solution Approach 1:
The invention changes the geometric parameters of the tear means from sharp edges to rounded protrusions with specific dimensions (height 1-5mm, diameter 2-6mm). This parameter modification maintains the tearing function while eliminating the harmful sharpness, allowing the protrusions to effectively initiate paper tears through controlled friction without being unpleasant to touch.
Solution Approach 2:
The invention uses composite construction by combining a rigid support structure (tear unit body) with elastomeric material having specific hardness properties (Shore A 40-90). This composite approach provides both the structural integrity needed for repeated use and the softness required for pleasant user contact, while the elastomeric protrusions maintain consistent tearing performance.
3Productivity
If conventional tear means are used, then paper separation is achieved, but inconsistent performance occurs with unsuccessful tear off and shredding
Solution Approach 1:
The invention changes the geometric parameters of the tear means from sharp edges to rounded protrusions with specific dimensions (height 1-5mm, diameter 2-6mm). This parameter modification maintains the tearing function while eliminating the harmful sharpness, allowing the protrusions to effectively initiate paper tears through controlled friction without being unpleasant to touch.
Solution Approach 2:
The invention applies local quality by distributing multiple protrusions (at least 3, preferably 5-15) across the friction surface of the tear unit. This distribution creates multiple localized tear initiation points along the paper web, ensuring consistent tearing performance regardless of where the paper contacts the tear unit, and preventing both unsuccessful tears and excessive shredding.
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 dispenser ensures efficient and reliable paper separation with a soft touch experience, maintaining performance over time without shredding, and always leaving a paper tail for easy dispensing, thus improving user convenience and durability.
Implementation Method 1
The elastomeric protrusions provide friction such as to facilitate the separation of web of paper by initiating tear of the continuous web of paper or perforated web of paper.
Data Source
AI summary
A dispenser for dispensing web of paper, the dispenser including a housing, a dispensing opening defined in the housing for dispensing paper. A tear unit is arranged at the dispensing opening for facilitating tear of the paper upon moving the tissue paper over the tear unit. The tear unit includes a tear unit body, and the tear unit body includes a friction surface provided with an elastomer. The elastomer includes rounded protrusions distributed along the friction surface such as to facilitate tearing during dispensing.