Continuous Bandage Roll Dispenser With Self-Adhesive Bonding
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Solution Overview
Problem
Conventional continuous bandage rolls are difficult to unroll and cut to a desired length without damaging the bandage, often requiring special medical tools and can adhere to themselves, making them unusable.
Innovation Solution
A bandage dispenser assembly with a moveable portion and a spindle that allows for easy unrolling and cutting of a continuous bandage roll, featuring a self-adhesive layer that can adhere to itself without damaging the bandage, and a cutter mechanism to cut the desired length, eliminating the need for release paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous bandage roll uses self-adhesive to adhere to itself when rolled, then the bandage remains protected during storage and handling, but the adhesive may damage the bandage material or cause difficulty in unrolling and cutting
Solution Approach 1:
A release paper is introduced as an intermediary layer between the self-adhesive and the bandage material. This release paper allows the bandage to adhere to itself when rolled for storage while preventing direct adhesive contact that would damage the bandage material. The release paper is easily removed during application without damaging the bandage.
Solution Approach 2:
The adhesive properties of the self-adhesive are modified to change its behavior under different conditions. The adhesive is formulated to have sufficient bonding strength when pressed together during rolling, but allows easy separation when a release force is applied during unrolling, without damaging the bandage material.
2Adaptability or versatility
If conventional continuous bandage rolls are cut to desired length, then customization for different wound sizes is achieved, but the bandage is difficult to cut and may be damaged during cutting
Solution Approach 1:
Perforation lines are pre-formed in the bandage material at regular intervals before use. These perforation lines indicate where the bandage should be broken or cut, making it easy for users to obtain the desired length without requiring special cutting tools or risking damage to the bandage material.
3Reliability
If release paper is used to prevent self-adhesion during rolling, then the bandage can be rolled without damage, but the release paper must be removed which is difficult and may damage the bandage or cause accidental adhesion
Solution Approach 1:
The release paper is designed as a disposable protective layer that is easily removed and discarded. It provides temporary protection during storage and handling, then is cleanly peeled away during application without leaving residue or causing damage to the bandage material.
4Manufacturing precision
If individual bandages are pre-cut to specific lengths, then appropriate sizing for wounds is ensured, but users must search for the correct size and convenience is reduced
Solution Approach 1:
The continuous bandage roll is segmented into multiple individual bandages of different lengths, separated by perforation lines or tear notches. This allows users to easily break or cut the bandage at the desired length during application, combining the precision of pre-cut individual bandages with the convenience of a continuous roll format.
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 easy and precise cutting of bandage lengths without damaging the bandage, allowing for safe and effective application to wounds while maintaining the bandage's adhesive properties.
Implementation Method 1
a self-adhesive disposed on a top surface of the first layer... the self-adhesive may releasably adhere to a bottom surface of the first layer in a rolled form
Implementation Method 2
when the self-adhesive is bonded to itself and opposing adhesive portions, the resulting peel strength is greater than a peel strength when the self-adhesive is bonded to skin
Data Source
AI summary
A bandage configured to be administered from a continuous roll, comprising: (I) a first layer of flexible webbed material, the first layer including a self-adhesive disposed on a top surface; and (II) a second layer of flexible padded material adhered to the first layer along a longitudinal axis by the self-adhesive, the second layer having a width less than a width of the first layer so that a portion of the self-adhesive is exposed on each longitudinal side of the second layer; wherein the self-adhesive may releasably adhere to a bottom surface of the first layer in a rolled form so that, when unrolled, an adhesive bond is broken free of damaging the first layer; and wherein, when the self-adhesive is bonded to itself and opposing adhesive portions, the resulting peel strength is greater than a peel strength when the self-adhesive is bonded to skin.