| 摘要 |
PROBLEM TO BE SOLVED: To reduce nesting in a metal filter by using a variable opening pitch expanded metal sheet having different spacings between adjacent rows of openings.SOLUTION: The filter is made by varying the rate at which the sheet is fed through equipment, the rate of punching, the amount of stretching, and/or the amount by which the sheet is optionally flattened. The expanded metal sheet is useful for making filters for automotive airbag inflators. Nesting can also be reduced by transversely indexing the punch, using different punch sizes on multiple punches, or combinations of these techniques. The filter can be wire wrapped to enhance its strength. |
