Paper Roll Support Friction Layout for Overspin Control
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Solution Overview
Problem
Existing dispenser apparatus for paper toweling or tissue sheet materials face issues with overspin leading to slack, which interferes with subsequent dispensing operations, and current solutions are complex and expensive.
Innovation Solution
A dispenser apparatus with centrally disposed roll support openings that include a roll support configured to exert frictional drag forces on the roll, reducing overspin by holding the roll off-center and using a hub projection with angled contact points to create additional friction, allowing for controlled rotation and dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional roll support is used, then the roll can rotate freely for dispensing, but overspin occurs creating slack that interferes with subsequent operation
Solution Approach 1:
The roll support applies preliminary frictional drag force to the roll in the direction opposite to potential overspin motion. This counteracting force is applied continuously during dispensing to prevent the roll from rotating beyond the intended amount, thereby eliminating slack formation and ensuring reliable subsequent operations.
Solution Approach 2:
The invention changes the friction parameter between the roll support and the roll by using a high-friction material or surface treatment on the roll support. This increased friction coefficient allows the support to exert sufficient drag force to control roll rotation and prevent overspin while still allowing controlled dispensing rotation.
2Reliability
If complex dispenser arrangements are used to address overspin, then overspin control improves, but device complexity and expense increase
Solution Approach 1:
The invention merges the overspin control function directly into the roll support structure itself. The roll support simultaneously performs its primary function of holding and rotating the roll for dispensing while also providing frictional drag for overspin control. This integration eliminates the need for separate overspin control mechanisms, reducing device complexity and expense.
Solution Approach 2:
The roll support structure serves itself by generating the necessary frictional drag force through its own design characteristics (material properties, surface geometry). The structure does not require external power sources, control systems, or additional components to achieve overspin control, as it self-regulates through inherent friction properties.
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 solution effectively reduces overspin and minimizes slack, ensuring smooth and efficient dispensing operations while accommodating various roll sizes and tolerances, thus improving the functionality of the dispenser without excessive complexity or expense.
Implementation Method 1
The roll support is configured to exert frictional drag forces on the roll to reduce overspin of the roll when the pulling force is terminated
Data Source
AI summary
Dispenser apparatus for holding a roll of paper toweling or tissue sheet material and dispensing the sheet material, the apparatus including structure exerting drag forces on the roll to reduce overspin when pulling forces on the sheet material causing dispensing have been terminated.