Offset Bundle Napkin Stack for Multi-Sheet Dispensing
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Solution Overview
Problem
Existing dispensers for web materials, such as napkins, often fail to efficiently and orderly dispense more than one sheet at a time, which is necessary for applications like take-away and drive-through restaurants where multiple napkins are required with each order.
Innovation Solution
A stack of web material is arranged with bundles of coextensive sheets that are alternatingly offset, allowing users to easily grasp and dispense multiple sheets simultaneously by pulling on an edge portion of the outermost bundle, which includes edges of all sheets in the bundle, facilitating the dispensing of at least two sheets together.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sheets are arranged in a conventional stack without bundling, then individual sheet dispensing is achieved, but efficient dispensing of multiple sheets simultaneously is not possible
Solution Approach 1:
The stack is segmented into multiple bundles, where each bundle contains a specific number of sheets (e.g., 2-10 sheets). This segmentation allows users to grasp and dispense multiple sheets simultaneously by pulling on a single bundle, significantly improving dispensing efficiency for applications like restaurant service where multiple napkins are needed at once.
Solution Approach 2:
The bundles are arranged in an alternating offset pattern in the longitudinal direction, creating a staggered configuration. This dimensional arrangement ensures that bundles are easily distinguishable and graspable from the side, while maintaining compact stacking. The offset pattern prevents sheets from adjacent bundles from interfering with each other, enabling smooth simultaneous dispensing of multiple sheets.
2Productivity
If bundles are arranged in an alternating offset pattern, then simultaneous dispensing of multiple sheets is enabled, but the stack structure becomes more complex
Solution Approach 1:
By dividing the stack into discrete bundles with clear boundaries, the complex arrangement is broken down into manageable units. Each bundle is a self-contained group of sheets that can be independently handled, reducing the perceived complexity despite the alternating offset pattern.
Solution Approach 2:
The offset pattern is applied locally to adjacent bundles rather than requiring a completely different stacking method throughout. This localized application of asymmetry maintains simplicity where possible while achieving the desired multi-sheet dispensing functionality in the critical dispensing region.
3Ease of operation
If sheets are provided in bundles of at least two sheets, then multiple sheets can be dispensed easily, but control over exact number of sheets dispensed becomes less precise
Solution Approach 1:
The bundle size parameter is optimized to contain a specific number of sheets (e.g., 2-10 sheets per bundle) based on the intended application. For restaurant use, bundles might contain 3-5 napkins, providing both ease of grasping and appropriate portion control. The parameter is chosen to balance operational ease with controlled dispensing.
Solution Approach 2:
The sheets are pre-grouped into bundles during stacking, with each bundle containing a predetermined number of sheets. This preliminary organization allows users to dispense the correct amount without needing to count individual sheets, achieving both ease of operation and controlled precision through advance preparation.
4Ease of operation
If bundles are alternatingly offset, then edge portion of outermost bundle is easily accessible, but space utilization in dispenser may be reduced
Solution Approach 1:
The alternating offset arrangement optimizes the longitudinal dimension for accessibility while maintaining compactness in the vertical dimension. Bundles are staggered along the length of the stack, allowing easy access to the outermost bundle's edge portion for grasping, while the overall stack height and width remain compact for efficient dispenser space utilization.
Solution Approach 2:
The offset pattern creates a dynamic accessibility advantage where the outermost bundle is always easily reachable regardless of stack depth. As bundles are removed, the alternating pattern maintains consistent accessibility, allowing the stack to adapt dynamically to decreasing quantity while preserving ease of operation.
Data Source
AI summary
A stack including a plurality of sheets of web material is provided. The stack includes a plurality of bundles of substantially coextensive sheets of web material. Each bundle includes at least two sheets of web material of said plurality of sheets of web material. In the stack, the bundles of said plurality of bundles are alternatingly offset in relation to each other. Further, a method of dispensing at least two sheets of web material is disclosed.