Smoking Article Tipping Pattern Seam Registration
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Solution Overview
Problem
Current methods for manufacturing filter cigarettes with decorative tipping patterns result in mismatches at the seam line due to the lack of precise pattern registration during the cutting process, leading to a negative visual impact on the finished product.
Innovation Solution
A smoking article design featuring a tipping with a cut-out pattern composed of periodically repeating subunits, where the subunit length is a natural number fraction of the circumference, ensuring pattern matching at the seam area without the need for registration, and allowing for variations in cutting without affecting the seam appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a decorative cut-out pattern is applied to the tipping rod-sided edge line, then visual appeal is improved, but pattern mismatch at the seam line occurs due to lack of registration during cutting
Solution Approach 1:
The decorative pattern is segmented into periodically repeating subunits along the rod-sided edge line. This segmentation allows the pattern to be divided into manageable segments that can be reproduced consistently during the cutting process, eliminating the need for complex registration while maintaining visual appeal.
Solution Approach 2:
The cut-out pattern consists of periodically repeating subunits with a period length that is a natural number fraction of the tipping circumference. This periodicity ensures that when the tipping is cut and rejoined at the seam, the pattern aligns automatically without requiring precise registration, as the same pattern segment repeats at regular intervals.
2Manufacturing precision
If precise pattern registration is implemented during cutting, then pattern alignment at the seam is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The periodic pattern design enables the tipping to self-align at the seam without requiring external registration systems. The naturally repeating pattern segments automatically match when the tipping is rejoined, eliminating the need for complex registration devices or processes.
3Manufacturing precision
If the tipping is cut to exact circumference length, then pattern matching at seam is improved, but manufacturing flexibility is reduced
Solution Approach 1:
The periodically repeating pattern with subunit length as a natural number fraction of the circumference allows the tipping to be cut at various positions while maintaining pattern continuity. Since the pattern repeats at regular intervals, any cut position will result in matching segments at the seam, providing manufacturing flexibility.
Data Source
Figure 1~2
Figure 3(a)~3(c)
Figure 4(a)~4(b)
AI summary
A smoking article (30) comprises a rod (32) and a filter (34) having a longitudinal axis and a circumference. The rod (32) and the filter (34) are connected by a tipping (36), which extends about the circumference and has a rod-sided edge line (37) provided with a cut-out pattern (38) along the circumference. The pattern (38) is composed of periodically repeating subunits having a subunit length measured along the circumference. The ratio of the circumference to the subunit length is a natural number, preferably 1 or 2.