Self-Adjusting Deflector Units for Printing Blade Containment
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Solution Overview
Problem
Existing end deflectors for printing blades cause disruption of the print medium roll at the lateral ends and damage to the printing screen due to repeated operation, and they are not effective in preventing the escape of print medium beyond the blade ends, especially with different types of print media like paste and adhesive.
Innovation Solution
A deflector unit with a compression spring biasing element and a deflector member that engages the printing screen, featuring a specific surface geometry to contain the print medium and prevent contamination, allowing for self-adjustment and easy switching between different print media types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing end deflectors are used to prevent print medium escape, then some containment is achieved, but disruption of the print medium roll and damage to the printing screen occur
Solution Approach 1:
The deflector is made movable relative to the printing blade, allowing it to dynamically adjust its position and angle during operation. This mobility enables the deflector to adapt to different printing conditions and print medium types, preventing screen damage while maintaining effective print medium containment
Solution Approach 2:
The deflector's angle and position parameters can be changed to optimize performance for different print media. The biasing element allows continuous adjustment of the deflector's engagement with the print medium roll, enabling effective containment without excessive force that would cause screen damage
2Device complexity
If fixed deflectors are used for all print media, then device complexity is reduced, but effectiveness varies with different print media types
Solution Approach 1:
The movable deflector with biasing element creates a universal system that can effectively handle different print media types (paste, adhesive, etc.) through a single standardized mechanism, eliminating the need for multiple fixed deflector configurations while maintaining adaptability
3Force
If rigid deflectors are used to contain print medium, then containment force is increased, but print medium roll disruption worsens
Solution Approach 1:
The movable deflector dynamically adjusts its engagement force with the print medium roll, applying sufficient containment force to prevent escape while avoiding excessive force that would cause roll disruption. The biasing element provides continuous force modulation
Solution Approach 2:
The deflector's angular and positional parameters can be optimized to achieve effective containment with minimal disruptive force, allowing the system to maintain print medium roll integrity while preventing escape
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 effectively prevents the escape of print medium beyond the printing blade ends, reduces screen damage, and allows for simplified switching between various print media, enhancing operational efficiency and reducing wastage.
Implementation Method 1
a biasing element which acts to bias the deflector in a downward direction
Data Source
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AI summary
Deflector units (9) for use with a printing blade (7) in printing a print medium through a printing screen (PS), which are self-adjustable in a vertical direction for controlling production of rolls of print medium.