Magnetic Tape Width Control via Tension Adjustment
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Solution Overview
Problem
Conventional magnetic recording media with tape shapes struggle to maintain stable recording reproduction properties in high-temperature environments, as changes in width due to temperature variations exceed the range that can be corrected by adjusting tension, leading to potential off-track issues.
Innovation Solution
A magnetic recording medium with a tape shape that maintains an average width change of 170 ppm or less and an average tension responsiveness of 700 ppm/N or more at 50°C and 40% RH, equipped with a storage unit for adjusting tension, allowing for effective correction of width changes even in high-temperature environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional magnetic recording media are used in high-temperature environments, then the operating temperature range is extended, but width changes exceed correction capabilities leading to off-track errors
Solution Approach 1:
The patent applies parameter changes by specifying precise control of width change (170 ppm or less) and tension responsiveness (700 ppm/N or more) to enable the magnetic recording medium to maintain stable recording reproduction properties across expanded temperature ranges including high-temperature environments up to 50°C
Solution Approach 2:
The patent employs dynamics by implementing active tension adjustment mechanisms that dynamically respond to width changes caused by temperature variations, allowing the system to maintain off-track within acceptable ranges through real-time correction rather than static design
2Manufacturing precision
If width change is reduced to enable tension correction, then off-track correction capability is improved, but material selection and manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges (width change ≤170 ppm, tension responsiveness ≥700 ppm/N) that balance manufacturing feasibility with performance requirements, enabling off-track correction through tension adjustment while maintaining practical manufacturability
Solution Approach 2:
The patent applies partial action by controlling width change to a specific threshold (170 ppm) that is sufficient to enable tension-based off-track correction without requiring extreme precision that would make manufacturing prohibitively difficult
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 enables stable recording reproduction by minimizing width changes and ensuring effective tension adjustment, thus preventing off-track errors in high-temperature conditions.
Implementation Method 1
an average tension responsiveness with respect to a tension in a longitudinal direction in an environment at a temperature of 50° C. and a relative humidity of 40% RH is 700 ppm/N or more
Data Source
AI summary
Provided is a magnetic recording medium with a tape shape capable of correcting a change in width of the magnetic recording medium by adjusting a running tension of the magnetic recording medium in a case where the magnetic recording medium is saved or caused to run in a high-temperature environment. The magnetic recording medium is a magnetic recording medium with a tape shape, an amount of change in average width of the magnetic recording medium before and after the magnetic recording medium is left still for 40 hours in an environment at a temperature of 50° C. and a relative humidity of 40% RH in a state where a tension of 0.55 N is applied in a longitudinal direction is 170 ppm or less, and an average tension responsiveness with respect to a tension in the longitudinal direction in the environment at a temperature of 50° C. and a relative humidity of 40% RH is 700 ppm/N or more.