Endless Printing Blanket with Alternating Twist Reinforcement
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Solution Overview
Problem
Existing multi-layer printing blankets face issues with precise and uniform straight running due to directional instability and material wastage from clamping channels, with previous solutions inadequately addressing elongation and straight-line stability.
Innovation Solution
A multi-layer, endless vulcanized printing blanket with a polymer mixture-based cover layer and reinforcement threads featuring alternating S-twist and Z-twist yarns or yarns, along with a compressible intermediate layer and integrated sensors for continuous position monitoring, ensuring precise straight-line stability and minimizing material consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a reinforcement layer is added to prevent elongation, then the printing blanket maintains its length, but the straight running stability and uniformity are not sufficiently improved
Solution Approach 1:
The patent uses a composite reinforcement structure combining two different yarn types (first yarn with one twist direction, second yarn with opposite twist direction) woven together in a grid pattern. This composite construction creates balanced tensile properties in both machine and cross directions, resolving the contradiction by providing both length stability and straight running stability through the synergistic effect of the dual-yarn system.
Solution Approach 2:
The patent applies different yarn properties in different directions of the reinforcement layer. The first yarns provide primary strength in the machine direction, while the second yarns with opposite twist compensate for directional instability. This local differentiation of yarn characteristics within the same layer addresses both length maintenance and straight running requirements.
2Ease of manufacture
If the printing blanket is manufactured as sheet goods and cut to length, then the printing material can be installed in clamping channels, but material is wasted in the clamping channel area and no printing can occur there
Solution Approach 1:
The patent employs an endless printing blanket that continues indefinitely without breaks or clamping channels. This continuous structure eliminates the non-printable clamping zones entirely, allowing printing to proceed continuously across the entire surface without material waste or interruption, thus achieving both ease of manufacture and zero material loss.
Solution Approach 2:
The invention removes the clamping channel component entirely from the printing blanket design. By using an endless continuous structure, the problematic clamping zones are extracted from the system, eliminating the source of material waste and enabling uninterrupted printing across the full blanket surface.
3Ease of manufacture
If conventional reinforcement structures are used, then the printing blanket can be manufactured, but the directional stability and uniform straight running are insufficient
Solution Approach 1:
The patent implements a composite reinforcement layer with two distinct yarn systems having opposite twist directions. This composite structure creates balanced mechanical properties that prevent directional instability while remaining manufacturable through conventional weaving processes. The dual-yarn composite resolves the contradiction by achieving high directional stability without compromising ease of manufacture.
Solution Approach 2:
The patent changes the twist direction parameter of the reinforcement yarns by using two yarn types with opposite twists (e.g., S-twist and Z-twist). This parameter modification creates a balanced reinforcement structure that achieves superior directional stability and uniform straight running while maintaining compatibility with standard manufacturing processes.
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 achieves significantly improved straight-line stability and uniform running with reduced material wastage, maintaining consistent physical properties across the printing blanket, and allows for easy handling and monitoring of printing accuracy.
Implementation Method 1
a yarn or twine with an S twist and a yarn or twine with a Z twist lying next to one another alternately in the running direction
Implementation Method 2
a first layer, which has a polymer mixture based on at least one elastomer
Data Source
Figure 1
AI summary
The invention relates to a multi-layered continuous article, in particular a printing blanket, which contains at least one reinforcing layer, and to a method for its manufacture. For precise and uniform straight running in the printing process, the multi-layered continuous article comprises a first layer, which has a polymer mixture based on at least one elastomer, at least one further layer, and at least one reinforcing layer, wherein the reinforcing layer is in the form of a thread construction, and the individual threads of the thread construction are in the form of yarn or thread, wherein a yarn or thread with an S-twist and a yarn or thread with a Z-twist are alternately arranged parallel to each other in the running direction.