One-Handed Waste Bag Dispenser With Separator and Leash Stability

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Solution Overview

Problem

Existing waste bag dispensing systems require two hands to operate, leading to issues like unraveling, tearing, or failing to detach bags from the roll, and lack mechanisms for stabilizing and controlling the orientation of bags during dispensing.

Innovation Solution

A one-handed waste bag dispensing system with a base member, cap, slit opening, tab, and securement means, including a back loop and top loop, to stabilize the system on a leash, and a separator to engage the perforated connections between bags, ensuring easy and controlled dispensing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a traditional waste bag roll holder is used, then the bag can be stored, but two hands are required to remove and detach the bag, which is inconvenient when one hand is occupied

Engineering Contradiction:

Improveease of bag removalVSAvoiddevice complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The holder is divided into distinct functional components: a base member with a cavity for the roll, a cap that secures the roll end, and a separator mechanism. This segmentation allows each component to perform its specific function independently, enabling one-handed operation while maintaining overall system simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A separator component acts as an intermediary tool that facilitates bag detachment. The separator is inserted between bags on the roll to break the adhesive bond, serving as a mediating element that enables easy bag removal without requiring manual pulling or complex mechanisms

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If one pulls on the waste bag roll with one hand, then bag access is faster, but multiple bags may unravel, stretch or tear the bag, or the bag may fail to detach

Engineering Contradiction:

Improvespeed of bag accessVSAvoidreliability of bag detachment

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The separator performs a preliminary action by breaking the adhesive bond between bags before the user pulls the bag off the roll. This preliminary separation prevents multiple bags from unraveling together and ensures clean, controlled detachment of single bags, maintaining both speed and reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The separator serves as a mediating tool that enables reliable bag detachment. By inserting the separator between bags to break adhesive bonds, it ensures that when the user pulls on the roll, only the intended bag detaches cleanly without stretching, tearing, or causing multiple bags to unravel

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the waste bag roll is held loosely, then one-handed access is easier, but the roll lacks stability and control over bag orientation

Engineering Contradiction:

Improveease of one-handed accessVSAvoidstability of the roll

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The cap and base member are merged into a unified holder structure that securely contains the roll. The cap fits over the roll end and engages with the base member, combining support and stabilization functions into a single integrated device that maintains roll stability during one-handed operation

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The holder structure adds dimensional stability by constraining the roll in three-dimensional space. The cavity accommodates the roll while the cap secures the end, preventing lateral movement and rotation, thereby providing stability without interfering with one-handed access

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

4Stability of the object's composition

If the bag is secured tightly to prevent unraveling, then bag orientation is controlled, but the bag becomes difficult to remove with one hand

Engineering Contradiction:

Improvecontrol of bag orientationVSAvoidease of bag removal

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The separator acts as a mediating tool that resolves the conflict between secure mounting and easy removal. By inserting the separator between bags to break adhesive bonds, it enables easy bag detachment while the holder structure maintains proper bag orientation and prevents unraveling during normal use

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12589964B2Dog waste-bag dispensing system for one-handed use

Publication Date: 2026.03.31 FABLE PETS INC

AI summary

A waste bag dispensing system comprising a base member defining a cavity configured to receive a waste bag roll, a cap configured to removably secure to the base member, a slit opening extending through the base member, a separator, and a securement means to secure the system to an object, such as a leash. The roll may comprise a plurality of waste bags in perforated connection around a hollow spool configured to removably receive a base friction post and a cap friction post, the friction posts applying a lateral pressure on the waste bag roll and a tab may apply pressure on an exterior of the roll. An end of the roll may extend through the slit opening towards the separator which may engage the perforated connection and permit the removal of one waste bag from the roll. The securement means may comprise a lateral and vertical stability means.