Clamp-Type Trash Can Heat Sealing for Bag-Safe Uniform Pressure

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Solution Overview

Problem

Traditional trash can heat-sealing structures cause damage to garbage bags, lead to poor sealing, and pose safety hazards due to rigid materials and excessive heating, as well as issues with bag sticking and flat structures bending.

Innovation Solution

A clamp-type heat-sealing structure with flexible clamping arms and a heat-insulating base, featuring a first clamping arm that rotates around a pivot to engage with a second clamping arm, ensuring even heat application and secure sealing without direct contact with heating elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If rigid clamping plates with large contact area are used, then sealing efficiency is improved, but garbage bags are easily damaged due to excessive heating

Engineering Contradiction:

Improvesealing efficiencyVSAvoidbag damage from excessive heating

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces rigid clamping plates with flexible clamping arms made of elastomeric materials. These flexible arms can conform to the surface of the garbage bag while applying pressure, preventing localized overheating and bag damage. The flexibility allows the heating element to maintain optimal contact pressure without concentrating excessive heat on any single point.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent changes the material parameter of the clamping component from rigid to flexible (elastomeric). This parameter change allows the clamping arm to adapt its shape and pressure distribution, improving heat distribution across the bag surface while maintaining sealing efficiency. The flexible material can deform to match the bag's contour, ensuring uniform heating.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If flat structures are used on pressure plates, then manufacturing is simplified, but the structure bends during operation causing poor sealing

Engineering Contradiction:

Improvepressure plate manufacturingVSAvoidsealing reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent employs flexible clamping arms that can bend and conform to the garbage bag's surface during operation. This flexibility ensures continuous contact between the heating element and the bag, maintaining reliable sealing even when the bag surface is irregular. The flexible arms prevent the flat structure bending issue by inherently adapting to surface variations.

Inventive Principle:

Principle #30Flexible shells and thin films

3Loss of substance

If thin garbage bags are used, then packaging material is reduced, but bags are prone to sticking at corners and direct damage

Engineering Contradiction:

Improvepackaging material reductionVSAvoidbag integrity during sealing

Core Design Contradiction:

Loss of substanceVSReliability

Solution Approach 1:

The flexible clamping arms gently grasp and hold the thin garbage bag during sealing, distributing pressure evenly across the contact area. This flexible grip prevents the bag from sticking at corners or suffering direct damage, while still providing sufficient pressure for effective sealing. The elastomeric material absorbs excess pressure, protecting the thin bag material.

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

Improves sealing efficiency, simplifies operation, reduces manufacturing costs, and enhances safety by preventing bag damage and heat-related hazards while ensuring uniform pressure distribution and heat concentration.

Implementation Method 1

the heating element is configured to heat and seal the garbage bag

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

the strap is configured to drive the first clamping arm to rotate around the articulated end to be close to or away from the second clamping arm

Methodology Applied

Scientific EffectMechanical force: Mechanical Force

Implementation Method 3

the pressing surface is configured to clamp the garbage bag with the heat-pressing surface

Methodology Applied

Scientific EffectPressure: Pressure Increase

Data Source

PatentUS20250368432A1Clamp-type heat-sealing structure for trash can

Publication Date: 2025.12.04 EKO GRP LTD

AI summary

A clamp-type heat-sealing structure for a trash can includes a heat-sealing unit and a strap. The heat-sealing unit includes a first clamping arm and a second clamping arm. The first clamping arm includes a connecting end and an articulated end. The connecting end is connected with the strap. The second clamping arm is located at a side of the articulated end. The strap is configured to drive the first clamping arm to rotate around the articulated end to be close to or away from the second clamping arm. The second clamping arm includes a heat insulating base and a heating element. The heat insulating base is provided with a heat-pressing surface, and the heating element is arranged on the heat-pressing surface. The first clamping arm is provided with a pressing surface, and the pressing surface is configured to clamp the garbage bag with the heat-pressing surface.