Vacuum-Sealed Shipping Envelope with One-Way Valve
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Solution Overview
Problem
Conventional shipping methods for elastic and compressible items, such as clothing, are inefficient as they require parcel delivery, which incurs higher costs and handling complexities due to size limitations, and there is a lack of reusable and tamper-evident solutions for shipping and returns.
Innovation Solution
A plastic shipping envelope with interlocking sealing strips and a one-way air valve that creates a relative vacuum, allowing items to be compressed to fit through a letterbox, reducing volume and enabling cost-efficient postal handling, while also serving as a reusable and tamper-evident packaging solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional shipping methods are used for elastic and compressible items, then items can be shipped, but the envelope volume remains large requiring parcel delivery with higher costs and handling complexities
Solution Approach 1:
The patent applies parameter changes by transforming the physical state of air within the envelope from atmospheric pressure to vacuum state. This is achieved through a vacuum sealing mechanism that removes air from the envelope chamber, causing compressible items inside to be compacted to a fraction of their original volume, thereby enabling letterbox delivery instead of parcel delivery
Solution Approach 2:
The patent utilizes pneumatic principles by employing a vacuum sealing system that creates a pressure differential. The vacuum seal mechanism uses atmospheric pressure to press the sealing surfaces together when vacuum is applied, and incorporates a one-way valve to maintain the vacuum state, enabling volume reduction without requiring continuous mechanical compression
2Volume of moving object
If the envelope is vacuumed to reduce volume, then letterbox delivery becomes possible, but the sealing complexity increases
Solution Approach 1:
The vacuum sealing mechanism incorporates self-sealing features where the vacuum pressure itself activates the sealing action. As vacuum is applied, the pressure differential automatically presses the sealing surfaces together, and the one-way valve automatically closes to maintain vacuum, eliminating the need for complex external sealing controls
Solution Approach 2:
The patent introduces a one-way valve as an intermediary component that mediates between the vacuum sealing process and the external environment. This valve allows air to be evacuated during sealing but prevents re-entry, maintaining the vacuum state without requiring continuous active control or complex sealing mechanisms
3Ease of manufacture
If a single-use envelope is used, then shipping is simple, but waste increases and return shipping requires additional packaging
Solution Approach 1:
The patent implements a reusable envelope system where the vacuum-sealed envelope can be opened, refilled, and resealed multiple times. The durable construction and reliable vacuum sealing mechanism allow the envelope to be recovered and reused for return shipping and subsequent shipments, eliminating the need for single-use packaging and reducing waste
Solution Approach 2:
The envelope is designed with multi-functionality to serve as both the shipping container and the protective packaging for returns. The vacuum sealing mechanism and durable construction enable the same envelope to be used for outgoing shipments, return shipments, and potentially storage, maximizing utility and minimizing packaging waste
4Loss of substance
If the envelope is made reusable, then waste is reduced, but the risk of tampering and contamination increases
Solution Approach 1:
The patent incorporates visual indicators such as color-changing or breakable seal strips that provide immediate visual evidence of tampering. When the envelope is opened or compromised, these indicators change state (e.g., color change, breakage), alerting users to potential tampering and maintaining trust in the reusable system
Solution Approach 2:
The envelope design includes pre-applied security seals and tamper-evident features that are in place before the envelope is used. These protective measures are built into the envelope structure from manufacturing, providing inherent tamper resistance and contamination protection without requiring additional user actions
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 envelope facilitates efficient postal processing by reducing volume, lowering transportation costs, minimizing handling hassles for recipients, and reducing waste by allowing items to be shipped and returned through standard letterboxes, enhancing automated processing and security through tamper evidence.
Implementation Method 1
a one-way air valve, fluidly connecting the chamber of the shipping envelope to the outside, such that air can be vacated, when said chamber is closed by sealing said airtight seal, from the chamber to the outside
Implementation Method 2
compressing the chamber. The internal volume of the chamber is then reduced and a relative vacuum arises in the chamber of the envelope
Implementation Method 3
The flap portion of the first sheet is provided with two vertically spaced apart strips of adhesive material, each arranged in a direction transverse to the side edges, each strip of adhesive material being covered, in the shown, unused, state, at its side facing away from the flap portion, by a respective user-removable backing
Data Source
AI summary
A plastic shipping envelope includes a first plastic sheet and a second plastic sheet, bonded to each other at a bottom edge and at side edges thereof, wherein a chamber is present between inner sides of the first and second plastic sheets, and wherein an access opening is provided at a top side of the shipping envelope, a resealable airtight seal with interlocking sealing strips, one of the interlocking sealing strips being arranged on the inside of the first sheet and the other of the interlocking sealing strips being arranged on the inside of the second sheet, both sealing strips being arranged near the access opening, in a direction transverse to the side edges, and a one-way air valve, fluidly connecting the chamber of the shipping envelope to the outside, such that air can be vacated, when the chamber is closed by sealing the airtight seal, from the chamber to the outside, wherein the first sheet has a flap portion that, with respect to the second sheet, extends beyond the top edge of the second sheet, wherein the flap portion of the first sheet is provided with two vertically spaced apart strips of adhesive material, each arranged in a direction transverse to the side edges, each strip of adhesive material being covered, at its side facing away from the flap portion, by a respective user removable backing, and wherein the flap portion is provided with a perforated tear line, arranged in between the strips of adhesive material.