Adjustable Envelope Heat-Seal Station for Variable Sizes

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Solution Overview

Problem

Existing automated packaging machines require significant reconfiguration and web changes when switching envelope sizes, making them inefficient for handling diverse envelope dimensions.

Innovation Solution

A station with adjustable components, including a sealing mechanism, spacer, and lateral guide, allows for precise alignment and sealing of envelopes of varying sizes without needing to change the entire web supply, using heat and pressure to activate sealable members.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If automated bagger is used for sealing envelopes, then sealing efficiency is improved, but device complexity and reconfiguration requirements increase when changing envelope sizes

Engineering Contradiction:

Improvesealing efficiencyVSAvoidreconfiguration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements adjustable sealing members that can be repositioned vertically and laterally to accommodate different envelope sizes. The sealing members are mounted on adjustable fixtures that allow dynamic reconfiguration without requiring complete machine replacement or complex reassembly, thus maintaining high sealing efficiency while reducing reconfiguration complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent allows modification of sealing parameters including the position, height, and spacing of sealing members to match different envelope dimensions. By enabling continuous adjustment of these parameters, the system maintains optimal sealing performance across various envelope sizes without requiring complex reconfiguration procedures.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If web format envelopes are used for automated processing, then productivity is improved, but adaptability to different envelope sizes decreases

Engineering Contradiction:

Improveprocessing speedVSAvoidenvelope size adaptability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent employs laterally adjustable sealing members that can be repositioned to accommodate different web envelope widths while maintaining continuous web processing capability. This dynamic adjustment allows the system to handle variable envelope sizes in web format without sacrificing processing speed or requiring interruption of the automated flow.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The sealing mechanism is designed to universally accommodate multiple envelope formats and sizes through adjustable positioning systems. The same continuous web processing mechanism can handle different envelope dimensions by repositioning the sealing members, providing multi-functionality that maintains high productivity across diverse envelope types.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If fixed sealing mechanism is used, then device complexity is reduced, but manufacturing precision and alignment accuracy deteriorate

Engineering Contradiction:

Improvemechanism simplicityVSAvoidsealable member alignment accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent incorporates positioning surfaces and spacers that pre-establish the correct alignment and spacing between sealing members and the sealable member before the sealing operation begins. This preliminary positioning ensures precise alignment is achieved automatically without requiring complex real-time adjustment mechanisms, maintaining both simplicity and precision.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces complex mechanical alignment systems with simpler positioning surfaces and fixed spacers that provide repeatable, precise alignment through their geometry alone. This substitution eliminates the need for complex adjustable mechanical linkages while maintaining high alignment accuracy through well-defined positional relationships.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enables efficient sealing of envelopes of different sizes without reconfiguring the machine, improving operational flexibility and reducing setup time.

Implementation Method 1

configured to apply heat and pressure to a sealable member on the envelope when the sealable member is disposed between the first and second sealing members. The heat and pressure are sufficient to activate the sealable member and form a closure seal

Methodology Applied

Scientific EffectHeat: Heating

Data Source

PatentUS12605959B2Stations for forming heat seals in envelopes

Publication Date: 2026.04.21 PREGIS LLC

AI summary

Stations for sealing envelopes include a spacer, a positioning surface, and an envelope support surface configured to support the envelopes. A sealing mechanism is provided with sealing members configured to apply heat and pressure to a sealable member on the envelope to form a closure seal. The spacer and the positioning surface are configured to align the sealable member with the sealing members when the envelope is resting on the envelope support surface.