Printing Blanket Non-Extensible Polymeric Backing Relief Areas
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Solution Overview
Problem
Metal-backed printing blankets are difficult to mount and tension on conventional printing presses due to their stiffness and inflexibility, and are expensive to manufacture, limiting their use in various lockup mechanisms and affecting print quality.
Innovation Solution
A printing blanket with a non-extensible polymeric backing layer and relief areas at the ends, allowing easy mounting in different lockup mechanisms, such as single reel rod, dual reel rod, t-bar, and plate lockup mechanisms, without reducing the blanket's gauge or requiring frequent retensioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a metal backing is used in the printing blanket, then dimensional stability and print quality are improved, but the blanket becomes difficult to mount and tension on conventional presses
Solution Approach 1:
The patent changes the material parameter of the backing layer from metal to a non-extensible polymeric material (such as polyester or polypropylene). This polymeric material provides comparable dimensional stability and non-extensibility to metal backings but maintains flexibility that enables easy mounting on conventional presses with single or dual reel rods and t-bar lockup mechanisms.
Solution Approach 2:
The patent replaces expensive metal backings with cheaper polymeric materials. While metal backings provide excellent dimensional stability, they are costly to manufacture and difficult to work with. The polymeric alternatives achieve similar performance at lower cost and with greater ease of installation.
2Reliability
If a metal backing is used in the printing blanket, then stretching is prevented, but manufacturing cost increases
Solution Approach 1:
The patent changes the material composition parameter from metal to non-extensible polymeric materials. These polymers (such as oriented polyester or polypropylene) inherently resist stretching and provide the necessary dimensional stability without the high manufacturing costs associated with metal backings and their complex assembly processes.
Solution Approach 2:
The patent substitutes expensive metal backings with cost-effective polymeric alternatives. The non-extensible polymeric materials achieve the same functional requirement of preventing blanket stretching during operation but are significantly cheaper to manufacture and process.
3Adaptability or versatility
If relief areas are removed from the blanket ends, then mounting flexibility across different lockup mechanisms is improved, but blanket structural integrity may be compromised
Solution Approach 1:
The patent applies local quality by creating relief areas (removed portions) specifically at the ends of the blanket where mounting is required, while leaving the main body of the blanket intact and structurally sound. This localized modification provides mounting flexibility for various lockup mechanisms without compromising the overall strength and integrity of the blanket during printing operations.
Solution Approach 2:
The patent segments the blanket structure by separating the functional mounting regions (ends with relief areas) from the operational printing region. The relief areas at the ends allow the blanket to be adapted to different lockup mechanisms, while the main body maintains full structural integrity for high-quality printing.
Data Source
AI summary
A printing blanket is provided which may include a printable surface ply, a compressible ply, one or more reinforcing fabric plies, and a non-extensible backing layer comprising a polymeric material. The printing blanket has first and seconds ends which are adapted to be inserted into the gap of a printing blanket cylinder, where each of the first and second ends may include a relief area formed by removing or molding a portion of the blanket or by removing or molding a portion of the non-extensible backing layer such that the blanket may be mounted in a wide variety of printing presses using a number of different lock-up mechanisms.