Rotatable Filter Segments for Adjustable Smoke Intensity
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Solution Overview
Problem
Existing filter elements for smoking articles offer limited control over the ratio of tobacco smoke to air, particularly when transitioning between reduced tar delivery states, restricting user control over smoke intensity.
Innovation Solution
A filter element with a plug of filter material surrounded by a substantially air-permeable plug wrap, featuring longitudinally aligned segments with perforations and apertures in the wrapping material, allowing for adjustable ventilation by aligning these features to vary the pressure drop and air dilution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a filter element uses a conventional design with limited ventilation adjustment mechanisms, then the structure is simple and manufacturing is easier, but the user control over smoke intensity and tar delivery is restricted
Solution Approach 1:
The filter plug is divided into multiple rotatable segments (first segment, second segment, third segment) that can be independently positioned. Each segment can be rotated to different angular positions around the longitudinal axis, allowing multiple ventilation configurations. This segmentation enables fine-grained control over air dilution ratios while maintaining a relatively simple overall filter structure.
Solution Approach 2:
The filter incorporates dynamic adjustability through rotatable segments that can be repositioned during or before use. The segments are mounted on a rotatable support structure, allowing the ventilation characteristics to be changed dynamically. This dynamic capability enables users to vary smoke intensity and tar delivery according to their preferences without requiring a completely different filter design.
2Adaptability or versatility
If a filter element provides variable ventilation between two reduced tar delivery states, then user control over tar delivery is improved, but the variation of air dilution remains relatively limited
Solution Approach 1:
The invention adds a rotational dimension to the filter segments, allowing them to be positioned at different angular orientations around the longitudinal axis. This rotational degree of freedom creates multiple alignment configurations between slots in one segment and perforations in adjacent segments, enabling a spectrum of air dilution ratios rather than just two fixed states. The multi-dimensional positioning capability significantly expands the air dilution variation range.
Solution Approach 2:
The filter employs a composite structure combining segments with different ventilation characteristics (slots and perforations) that work together when aligned. By compositeing multiple segment types with complementary ventilation features, the system achieves a broader range of air dilution ratios while maintaining control over tar delivery between reduced states.
3Manufacturing precision
If a filter element uses aligning slots and porous plug wrap for air flow control, then manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The invention merges multiple ventilation control features (slots in first segment, perforations in second segment, apertures in wrapping material) into a single integrated rotatable assembly. These features are combined on different segments that rotate together as a unit, reducing the number of separate adjustable components. This merging maintains manufacturing precision for alignment while simplifying the overall device structure and reducing component count.
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
This design provides improved control over smoke intensity and tar delivery, enabling fine-tuning of cigarette taste and tar levels between ventilated states with reduced resistance and cost-effective manufacturing.
Implementation Method 1
at least one plug of filter material surrounded by a substantially air permeable plug wrap
Implementation Method 2
providing a mechanism by varying the pressure drop across the filter
Data Source
Figure 1~3
Figure 4~5
Figure 6A~7
AI summary
A filter element (3) for a smoking article, the filter element (3)comprising :at least one plug of filter material surrounded by a substantially air permeable plug wrap(40), wherein the plug of filter material comprises at least two segments (5, 6) being longitudinally aligned and rotatably mounted about a common longitudinal axis, at least one of the segments (5, 6) comprising at least one perforation(8) formed in the substantially air permeable plug wrap(40); and a wrapping material (9) surrounding at least one portion of the substantially air permeable plug wrap (40), the wrapping material (9) comprising a first part (10) attached to a first (5) of the two segments of the plug of filter material and a second part (11) attached to the second segment (6) of the plug of filter material,and comprising at least one aperture (13) formed therein, the first and second parts (10, 11) of the wrapping material (9) and first and second segments (5, 6)of the plug of filter material being arranged such that the respective at least one perforation (8) of the substantially air permeable plug wrap (40) and the at least one aperture(13) of the wrapping material (9) can be superimposed upon rotation of one of the segments (5, 6) of the plug of filter material about the common longitudinal axis to vary the filter ventilation.