Coin Roll Holder with Spacers for Variable Coin Counts

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing coin roll holders do not efficiently accommodate a variable number of coins while maintaining security and visibility, especially for different coin denominations and types, and lack flexibility in handling slight variations in coin thickness.

Innovation Solution

A standard-sized coin roll holder is designed to accommodate a variable number of coins by using alternating coins and spacers, with a compressible silicone rubber washer to secure the stack, and a tamper-evident case to prevent movement, allowing for different configurations such as 10 or 5 coins with specific spacer thicknesses, and using styrene acrylonitrile resin or silicone rubber materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a standard sized holder is used to accommodate a variable number of coins, then the holder can be universally applied to different coin counts, but the coins may move or shift within the holder without proper spacing

Engineering Contradiction:

Improveholder compatibilityVSAvoidcoin stack stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

Spacers are introduced as intermediary elements between coins to maintain proper spacing and prevent movement. The spacers fill the gaps created when fewer than the full capacity number of coins are placed in the holder, ensuring the coin stack remains stable and secure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The thickness of spacers is varied based on the number of coins being accommodated. By adjusting the spacer thickness parameter, the holder can adapt to different coin counts while maintaining proper spacing and stack stability. For example, thicker spacers are used when fewer coins are present.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If spacers are used to maintain proper spacing between coins, then coin movement is prevented, but the device complexity increases due to additional components

Engineering Contradiction:

Improvecoin stack stabilityVSAvoidholder structure

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The holder system is segmented into distinct functional components: the holder itself, the coins, and the spacers. This segmentation allows each component to perform its specific function independently, with spacers dedicated to spacing and stabilization, while the holder provides containment and protection.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If a compressible washer is added to account for variations in coin thickness, then the stack is securely held, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvecoin thickness accommodationVSAvoidspacer and washer dimensions

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The compressible washer introduces a variable parameter (compression) to accommodate variations in coin thickness. Instead of requiring precise manufacturing for every possible coin thickness combination, the washer's compressibility allows it to adapt to different thickness variations while maintaining secure stacking.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The compressible washer functions as a flexible element that can deform to accommodate variations in coin thickness. This flexibility compensates for manufacturing tolerances and coin thickness variations without requiring high-precision manufacturing of the washer itself.

Inventive Principle:

Principle #30Flexible shells and thin films

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 allows for secure and flexible encapsulation of coins, ensuring that the stack is immovable within the case, maintaining coin visibility and security, and accommodating various coin counts and types with precise spacer thickness adjustments, enhancing long-term storage and authentication.

Implementation Method 1

A compressible silicone rubber washer can also be included to account for slight variations in coin thickness

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS11430282B2Use of spacers to accommodate less than a capacity number of coins in a roll of coins in a case

Publication Date: 2022.08.30 PROVENANCE NGC LLC

AI summary

A standard sized coin roll holder is loaded with a stack of alternating coins and spacers such that a variable number of coins can be accommodated in a standard sized holder. The number of coins loaded into the holder can be configured to be one more than the number of spacers, starting with a coin, then a spacer and so on, such that a coin occupies both the first position and the last position in the stack and making a coin face visible at each end. A twenty coin holder can be loaded, for example, with 10 coins and 9 spacers or with 5 coins and 4 spacers. A compressible silicone rubber washer can also be included to account for slight variations in coin thickness, thus securing the stack within the available height inside a closed and sealed case.