Elastic Grip Bars for Uniform Vacuum Sealing

Solution Overview

Problem

Conventional vacuum packaging devices often result in uneven gripping of packaging bags, leading to creasing and inadequate sealing, which can cause air to enter the bag and deteriorate the contents.

Innovation Solution

The vacuum packaging device employs a pair of grip bars with elastic bars having circular cross-sections that are press-fitted into fixing spaces, providing a uniform pressing force along the longitudinal direction of the grip bars to prevent creasing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional grip bars are used to grip the packaging bag, then the packaging process can be completed, but the grip is uneven causing creases and inadequate sealing

Engineering Contradiction:

Improvesealing qualityVSAvoidgrip uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The grip bars are changed from rigid structures to elastic bars with circular cross-sections that can deform elastically. This parameter change allows the grip bars to adapt to the packaging bag surface, providing uniform pressure distribution and eliminating creases while maintaining reliable sealing.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses elastic bars that function as flexible structural elements. These elastic bars can deform and conform to the packaging bag surface, ensuring even contact and uniform gripping force throughout the sealing area, thereby preventing creases and improving seal quality.

Inventive Principle:

Principle #30Flexible shells and thin films

2Device complexity

If rigid grip bars are used, then the structure is simple, but the packaging bag is creased due to non-uniform pressure distribution

Engineering Contradiction:

Improvegrip bar structureVSAvoidcreasing

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The grip bars are changed from rigid structures to elastic bars with circular cross-sections that can deform elastically. This parameter change allows the grip bars to adapt to the packaging bag surface, providing uniform pressure distribution and eliminating creases while maintaining reliable sealing.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses elastic bars that function as flexible structural elements. These elastic bars can deform and conform to the packaging bag surface, ensuring even contact and uniform gripping force throughout the sealing area, thereby preventing creases and improving seal quality.

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

This solution ensures that the packaging bag is gripped uniformly, reducing the defect rate and preventing creasing, which in turn ensures proper sealing and maintains the quality of the packaged contents.

Implementation Method 1

elastic bars having circular cross-sections are press-fitted and coupled through openings of the fixing spaces, and the elastic bars coupled to the fixing spaces apply a uniform pressure to the packaging bag that has entered between the pair of grip bars in a lateral direction to be gripped

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a suction nozzle unit which moves forward and backward along a guide inside an inner space of the housing, enters an opening of the packaging bag gripped by the grip unit, and sucks the atmosphere inside the packaging bag to be a vacuum state

Methodology Applied

Scientific EffectSuction: Suction

Implementation Method 3

a pair of heat-pressing members which are respectively provided in the pair of grip bars, come into surface contact with each other to heat-press the ends of the packaging bag for which the suction has been completed to heat-fuse and seal the packaging bag

Methodology Applied

Scientific EffectHeat sealing: Heating

Data Source

PatentUS12304676B2Vacuum packaging device

Publication Date: 2025.05.20 PARK BYUNG MU

AI summary

A vacuum packaging device includes a hexahedral housing having a space inside; a grip unit in which a pair of grip bars selectively come into surface contact with each other above a front side of the housing; a suction nozzle unit which moves forward and backward along a guide inside an inner space of the housing; a pair of heat-pressing members which are respectively provided in the pair of grip bars; and lifting and lowering means for lifting and lowering an upper grip bar of the pair of grip bars and an upper heat-pressing member of the pair of the heat-pressing members inside the inner space of the housing by a process step.