Embossing Wheel Units for Tissue Paper Joining
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Solution Overview
Problem
Existing methods for joining tissue paper plies, such as using steel-on-steel rollers, are costly, require long tooling times to change decorative patterns, and lack aesthetic appeal, with visible embossed lines being unattractive and inefficient.
Innovation Solution
An apparatus featuring embossing wheel units anchored to a supporting beam, which can be easily replaced and lubricated, using a pneumatic means to push against a contrast roller, forming decorative and joining patterns without the need for precise roller scoring, allowing for rapid pattern changes and reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If steel-on-steel rollers or point to point rollers are used for joining plies, then the joining precision and reliability are improved, but the device cost and manufacturing complexity increase significantly
Solution Approach 1:
The patent replaces expensive, precision-machined steel rollers with simpler, less costly embossing wheels that can be easily replaced. The embossing wheels are made of materials that are less demanding in terms of manufacturing precision, reducing both initial cost and maintenance requirements while maintaining effective ply joining functionality.
Solution Approach 2:
The patent substitutes the complex mechanical roller system with a different mechanism involving embossing wheels that press decorative patterns onto the paper plies. This substitution simplifies the overall system by eliminating the need for precisely scored steel rollers while achieving the same joining function through a different mechanical approach.
2Manufacturing precision
If steel-on-steel rollers with precise scoring are used, then the joining quality is improved, but the tooling time to change decorative patterns increases
Solution Approach 1:
The patent divides the decorative pattern function into separate, interchangeable embossing wheels, each carrying a specific pattern. This segmentation allows individual wheels to be quickly swapped without affecting the entire system, enabling rapid changeover between different decorative patterns while maintaining consistent joining quality.
Solution Approach 2:
The patent implements a dynamic system where embossing wheels can be easily installed and removed based on production requirements. This dynamic configuration allows the system to adapt quickly to different pattern needs without the long tooling times associated with re-scoring fixed steel rollers, thereby reducing downtime and increasing operational flexibility.
3Reliability
If conventional knurling tools are used to join plies, then the joining function is achieved, but the aesthetic appearance deteriorates due to visible embossed lines
Solution Approach 1:
The patent applies different qualities to different parts of the joining process: the embossing wheels create decorative patterns with specific aesthetic qualities while simultaneously performing the joining function. The local application of decorative embossing transforms the previously uniform, visible knurling lines into aesthetically pleasing patterns that serve both functional and cosmetic purposes.
Solution Approach 2:
The patent converts the harmful effect of visible embossed lines (which were considered aesthetic defects) into a beneficial feature by using decorative embossing patterns. The same pressure application that creates the joining bond now creates attractive decorative designs, turning what was previously a negative visual element into a positive aesthetic feature that enhances product appeal.
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
Enables quick and cost-effective modification of decorative patterns, ensuring reliability and safety in the joining process while eliminating the need for lengthy tooling times and reducing the visibility of joining lines, producing aesthetically pleasing products.
Implementation Method 1
a pneumatic means adapted to push the embossing wheel units (4) against the contrast roller (3)
Implementation Method 2
Each support (6) is provided with a lubrication device (12) that is adapted to lubricate the wheel (5)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An apparatus for joining two or more plies of tissue paper for producing interleaved items, particularly facial tissues, characterized in that it includes a contrast roller arranged transversely with respect to the advancement direction of at least two plies of tissue paper, and a plurality of embossing wheel units acting on the plies of tissue paper in contrast with the contrast roller; each embossing wheel unit includes a wheel hinged in a support, which is associated with a fixed member of the apparatus; each wheel is removable from the support without removing the support from the fixed member and includes protrusions that form a decorative pattern and are adapted to deform the plies of tissue paper in contrast with the contrast roller, joining the plies and forming a decoration thereon. The decorative pattern and joining lines thus formed produce a series of rows of tissues in the advancement direction of the tissue paper plies.