Dental Tape Coating Die for Uniform Coating Without Telescoping
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Solution Overview
Problem
Dental flosses, particularly those made from elastomeric materials, often suffer from telescoping issues during the bobbin formation process, leading to non-uniform coating and difficulties in mounting them in dispensers, due to high tension caused by uneven velocity and tension variations during processing.
Innovation Solution
A coating die apparatus that applies a coating composition uniformly to both sides of the dental tape as it passes through, maintaining low tension and using a controlled speed to prevent telescoping, with features like passage bores and rollers to ensure even coating and minimize tension on the tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If high tension is applied during supply roll forming to maintain tape stability, then tape positioning is improved, but telescoping occurs during bobbin formation
Solution Approach 1:
The patent changes the tension parameter during different processing stages. Low tension is maintained during supply roll forming to prevent telescoping, while the tape is still processed effectively through controlled coating and winding operations.
2Manufacturing precision
If high tension is applied during bobbin formation to ensure tight winding, then winding density is improved, but telescoping occurs causing conical shape
Solution Approach 1:
The patent performs preliminary actions to prevent telescoping before it occurs. By controlling tension during supply roll forming and using guide rollers to maintain proper tape alignment, the tape is prepared in a tension-free state before bobbin formation, preventing the conical shape defect.
3Manufacturing precision
If coating process stretches and relaxes the tape to ensure even coating, then coating uniformity is improved, but tension variations increase causing telescoping
Solution Approach 1:
The patent applies coating in a controlled manner that provides sufficient coverage without excessive stretching. The coating process is optimized to achieve uniform coating with minimal tension variation, avoiding the telescoping effect while still ensuring adequate coating uniformity.
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 solution ensures a uniformly coated dental tape with reduced telescoping issues, allowing for consistent and efficient processing, and easy mounting into dispensers, thereby improving the usability and effectiveness of the dental tape.
Implementation Method 1
at least two passage bores having an inlet for receiving a coating composition, the at least two passage bores comprising: a first passage bore extending through the first side of the entrance slot and delivering the coating composition from the first passage bore outlet to the first side of the tape; and a second passage bore extending through the second side of the entrance slot and delivering the coating composition from the second passage bore outlet to the second side of the tape
Data Source
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AI summary
This present invention relates to an apparatus and a process for evenly and uniformly coating dental tape.