Dispenser for dispensing sheet products
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Solution Overview
Problem
Existing dispensers for sheet products, such as sanitary paper, often result in the incorrect number of products being dispensed at bundle breaks, leading to inconsistent dispensing and potential over-dispensing due to reduced friction between consecutive sheets.
Innovation Solution
The dispenser incorporates engagement surfaces on its sides, which are inclined and elastically biased, to increase friction between sheet products and folds, ensuring that the next consecutive sheet product protrudes from the dispensing opening even at bundle breaks, thereby ensuring accurate dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple stacks of sheet products are loaded in the dispenser, then the dispenser can accommodate more sheet products, but the friction between consecutive sheets is reduced at bundle breaks causing incorrect dispensing
Solution Approach 1:
A friction element is introduced as an intermediary component between the sheet products and the housing side wall. This friction element (such as a friction strip or friction wheel) mediates the interaction by providing increased friction force at the bundle break interface, ensuring that consecutive stacks of sheet products are properly engaged and dispensed accurately without compromising the ability to store multiple stacks.
Solution Approach 2:
The friction characteristic is made non-uniform by concentrating increased friction at specific locations where bundle breaks occur. The friction element is positioned specifically at the side wall region where multiple stacks interface, creating localized high friction zones that prevent slippage at bundle breaks while leaving other regions unchanged, thus maintaining the ability to accommodate multiple stacks while ensuring dispensing accuracy.
2Device complexity
If the dispenser housing has fixed side walls, then the structure is simple, but the friction between sheet products and housing is insufficient leading to over-dispensing
Solution Approach 1:
The housing side wall is transformed from a completely fixed structure to a dynamic system that can adapt to different sheet product configurations. The friction element is designed to be movable or adjustable along the side wall, allowing it to dynamically position itself at the appropriate location where bundle breaks occur, thereby maintaining dispensing accuracy without requiring a completely redesigned complex housing structure.
Solution Approach 2:
Rather than making the entire housing structure complex, a separate friction element is introduced as an intermediary component that can be attached to or integrated with the simple housing. This friction element (strip or wheel) provides the necessary friction enhancement while keeping the basic housing structure simple and easy to manufacture.
3Reliability
If engagement surfaces are added to increase friction, then dispensing accuracy improves, but the device complexity increases
Solution Approach 1:
A friction strip made of flexible material is used as the engagement surface. This thin film-like component can be easily attached to the housing side wall or integrated into it, providing increased friction through its material properties rather than through complex mechanical engagement surfaces. The flexible nature allows it to conform to the sheet products and maintain consistent contact, improving dispensing accuracy while adding minimal complexity.
Solution Approach 2:
The friction element is designed as a simple, inexpensive component that can be easily replaced if needed. Rather than creating complex permanent engagement surfaces, a simple friction strip or wheel is used that provides the necessary function at low cost and with minimal structural complexity, making the overall device simpler rather than more complex.
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
This design ensures that the correct number of sheet products is dispensed at a time, reducing the risk of over-dispensing and ensuring consistent access to the next sheet product, even at bundle breaks, by modifying the friction characteristics and guiding sheets towards the dispensing opening.
Implementation Method 1
The engagement surfaces are inclined and elastically biased to increase friction between sheet products and folds
Implementation Method 2
engagement surfaces... to increase friction between sheet products and folds, ensuring that the next consecutive sheet product protrudes
Data Source
AI summary
Dispenser for dispensing sheet products stacked in a stacking direction comprising a housing having first opposite side walls and second opposite side walls defining an interior space configured to accommodate the stack of the sheet products, the housing defining a dispensing opening at a front end of the first and second opposite side walls, and an engagement surface arranged at a front end portion of each of the first opposite side walls closer to one of the second opposite side walls than to the other of the second opposite side walls, wherein the engagement surfaces are engageable with respective opposite edges of the sheet products and extend in the stacking direction.