Ostomy Bag Strap Members for Reliable Plate Sealing
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Solution Overview
Problem
Existing ostomy bags require frequent emptying and have manufacturing challenges due to adhesive attachment of plate members, which complicates the manufacturing process and can lead to leakage or improper sealing.
Innovation Solution
Incorporating strap members between the plate members, which provide reinforcement and protection during manufacturing, allowing for welding and ensuring a consistent distance for reliable sealing, and are formed integrally with the plate members to simplify handling and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plate members are attached to film blanks by adhesive, then manufacturing is simplified, but manufacturing precision and reliability are compromised due to positioning difficulties
Solution Approach 1:
The patent introduces a distance piece as an intermediary component between the first and second plate members. This distance piece serves as a physical spacer that automatically maintains the required distance between plate members during welding, eliminating the need for precise adhesive application and positioning. The distance piece acts as a mediator that translates the design requirement for specific plate spacing into a tangible manufacturing fixture.
Solution Approach 2:
The patent replaces the chemical bonding mechanism (adhesive attachment) with a mechanical positioning system. Instead of relying on adhesive properties and manual positioning accuracy, the design uses the physical presence of the distance piece to mechanically enforce the correct spacing. This substitution transforms a chemistry-dependent process into a geometry-dependent process, significantly improving reproducibility.
2Manufacturing precision
If welding is used to attach plate members to film blanks, then manufacturing precision improves, but the film blank is damaged by heat
Solution Approach 1:
The distance piece serves as a thermal intermediary that protects the film blank from direct heat exposure during welding. By positioning the distance piece between the welding point and the film blank, it acts as a heat sink and thermal barrier, absorbing and dissipating excess heat before it can damage the polymer film material.
Solution Approach 2:
The distance piece is positioned in advance before welding occurs, providing pre-positioned thermal protection. This beforehand cushioning ensures that when welding heat is applied, the protective element is already in place to absorb the thermal冲击, preventing damage to the film blank before it can occur.
3Ease of manufacture
If distance between plate members is not controlled, then manufacturing is easier, but sealing reliability deteriorates
Solution Approach 1:
The distance piece enables the assembly to self-regulate its own geometry. Instead of requiring external measurement and adjustment tools or skilled operator judgment, the distance piece's fixed dimensions automatically enforce the correct spacing between plate members during assembly. The component serves itself as both the spacer and the positioning reference.
Solution Approach 2:
The patent transforms the critical parameter of plate member spacing from a process-controlled variable (requiring skilled operation) into a component-inherent property. By embedding the distance specification directly into the physical dimensions of the distance piece, the spacing parameter becomes fixed and automatic, eliminating variability introduced by manual processes.
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 strap members enhance the reliability and longevity of the ostomy bag by maintaining a consistent distance between plate members, ensuring a tight seal and simplifying the manufacturing process, reducing the risk of leakage and improving the overall functionality.
Implementation Method 1
the strap members absorb some of the heat necessarily involved in the welding process
Implementation Method 2
the elasticity of the film blanks provides a sealing force
Data Source
AI summary
The collecting bag is intended for human body wastes and has a bag member (1) and a discharge portion (8) including a discharge opening (9). The bag member (1) and the discharge portion (8) are formed by a first and a second film blank (2, 3). A first plate member (21) is positioned on the first film blank (2) and a second plate member (22) is positioned on an extension (3e) of the second film blank (3) such that the plate members have a distance (d) between them. Two strap members (23, 24) are positioned between the first and the second plate member (21, 22).