RF-Electrode Tablet Press for Stable Orally Disintegrating Forms
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Solution Overview
Problem
Conventional compression-based tableting machines produce highly friable, unstable chewable or orally disintegrating tablets when used at low compression forces, making them unsuitable for packaging, shipping, and storage.
Innovation Solution
A machine and process utilizing radiofrequency (RF) energy to form tablets by heating a powder blend within a forming cavity between RF electrodes, allowing for the production of stable, aesthetically pleasing chewable or orally disintegrating tablets with controlled hardness and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If low compression forces are used to produce chewable or orally disintegrating tablets, then the tablets have easier bite-through and disintegration properties, but the tablets become highly friable and unstable during packaging, shipping, and storage
Solution Approach 1:
The patent applies radiofrequency energy to heat the powder blend during compression, fundamentally changing the thermal parameter of the process. This thermal energy enables the formation of stable bonds between particles at lower compression forces, resolving the contradiction between softness and stability by adding a new energy dimension to the compression process
Solution Approach 2:
The patent replaces purely mechanical compression with a combined radiofrequency thermal-mechanical process. The RF energy substitution for additional mechanical force allows achieving tablet stability without increasing compression pressure, thereby maintaining ease of bite-through while improving structural integrity
2Strength
If reduced compaction pressures are employed to create softer tablets, then the tablets are easier to chew and disintegrate, but the tablets become more fragile and brittle requiring complex and costly processing steps
Solution Approach 1:
The patent substitutes mechanical reinforcement methods with radiofrequency energy application. Instead of using complex multi-step processing to strengthen soft tablets, the RF energy directly heats the powder blend during compression, creating strong interparticle bonds that eliminate the need for additional strengthening steps
Solution Approach 2:
The patent changes the energy parameter by introducing radiofrequency heating during compression. This thermal parameter modification allows achieving adequate tablet strength at reduced pressures without requiring complex post-processing steps, thereby simplifying the overall manufacturing process
3Productivity
If conventional compression-based tableting machines are used at low compression forces, then chewable or orally disintegrating tablets can be produced, but the tablets are highly friable and not sufficiently stable for packaging, shipping, and storage
Solution Approach 1:
The patent merges radiofrequency heating with the compression process in a single integrated step. This combination of thermal and mechanical energy application during tablet formation achieves both high production rates and improved tablet stability, eliminating the need for separate stabilization steps
Solution Approach 2:
The patent replaces the limitation of purely mechanical compression with a radiofrequency-enhanced compression system. The RF energy substitution for additional mechanical pressure maintains high production speeds while fundamentally improving tablet stability during handling and storage
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 RF energy process enhances the stability and handling of tablets during manufacturing, packaging, and storage, while maintaining the desired disintegration properties and mouthfeel, addressing the fragility issues of conventional low-compression tablets.
Implementation Method 1
conducting RF energy between the first electrode and the second electrode such that the energy heats the powder blend within the forming cavity to form the dosage form
Data Source
Figure 1A~1F
Figure 2A~2E
Figure 2F~2H
AI summary
The present invention features the present invention features a machine for the production of a solid dosage form including: (a) a die platen having one or more forming cavities each having an inner wall, a first opening at the surface of one side of the die platen, and a second opening at the surface on the opposite side of the die platen; (b) one or more first forming tools each adapted to move into one of the forming cavities through the first opening of the forming cavity; (c) one or more second forming tools each adapted to move adjacent to one of the second openings or into one of the forming cavities through the second opening of the forming cavity; (d) at least one first RF electrode operably associated with the one or more first forming tools, the one or more second forming tools, or the inner wall of the one or more forming cavities; and (e) at least one second RF electrode operably associated with the one or more first forming tools.