Dauber Applicator Assembly with Press-Fit Holding Means
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Solution Overview
Problem
Existing dauber applicators and containers for solvent cement face issues such as rusting, denting, and injury due to sharp edges, with fixed-length metal daubers that are difficult to weld or solder to plastic caps, leading to durability problems and inconsistent solvent cement application.
Innovation Solution
A plastic multilayer container with a cap that accommodates metal daubers of varying lengths, featuring a cavity for the dauber and a patterned end for secure press-fitting, combined with a manufacturing method that includes shaping the dauber, molding a holding means, and assembling the cap with a five-layer structure for chemical resistance and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal dauber is welded or soldered to plastic cap, then connection strength is improved, but cap deformation or loose connection occurs
Solution Approach 1:
The patent replaces the welding/soldering process with a mechanical press-fit system. A holding means molded from plastic is inserted into a cavity in the cap, and the metal dauber is pressed into this holding means, creating a secure mechanical connection without heat or fusion processes.
Solution Approach 2:
The connection system is divided into separate components: a holding means component and a cap component. This segmentation allows the dauber to be easily inserted and removed without permanent bonding, avoiding the deformation risks of welding while maintaining secure connection.
2Ease of manufacture
If fixed length metal dauber is used, then manufacturing simplicity is improved, but adaptability to different application surfaces is worsened
Solution Approach 1:
The patent enables dynamic adjustment of dauber length by allowing the metal dauber to be inserted into the holding means at different positions. This permits the same cap assembly to accommodate various dauber lengths (e.g., 50mm, 100mm, 150mm) depending on the specific application requirements, transforming a static fixed-length system into a dynamic adjustable one.
3Ease of manufacture
If tin container is used for solvent cement, then manufacturing simplicity is improved, but rusting, denting and shelf life are worsened
Solution Approach 1:
The patent employs a composite plastic structure consisting of multiple layers: an inner solvent-resistant layer, a middle adhesive layer, and an outer protective layer. This composite construction provides both chemical resistance to solvent cement and mechanical durability against rusting and denting, while maintaining manufacturing feasibility through conventional plastic molding techniques.
4Ease of manufacture
If very small or very large length of applicator is used, then manufacturing simplicity is improved, but sufficient solvent cement application to targeted surface is worsened
Solution Approach 1:
The adjustable length mechanism allows the dauber to be dynamically configured to match the specific application scenario. For small surfaces, a shorter dauber (50mm) provides precise control, while for large surfaces, a longer dauber (150mm) enables efficient coverage, ensuring optimal application effectiveness across different scales without compromising manufacturing simplicity.
Data Source
AI summary
Disclosed is a cap 101 and a plastic multilayer container 601 for solvent cement products. Further, the cap 101 comprises a cavity 102. The cavity may be configured to accommodate a metal dauber applicator comprising a metal dauber applicator wire 104, wherein the wire 104 comprises a first end 302 and a second end 304, wherein the first end 302 may be fitted with cotton blob 105. Further, the second end 304 may be shaped. The system 600 may comprise a holding means 103, molded over at second end 304. Further, the holding means 103 is configured to be press fitted in the cavity 102, thereby forming the cap 101 and the metal dauber assembly. Further, the cap 101 may comprise internal threads 106, which enables the cap 101 to be screwed onto a plastic multilayer container 601.