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US4599080A Method for folding jacket material for disk or the like 失效
用于折叠用于盘等的护套材料的方法

Method for folding jacket material for disk or the like
Abstract:
A method for folding a jacket material mainly for a magnetic cartridge, by using a folding insert, a folding bar and a heater bar, into a jacket of good external shape and high dimensional precision with a folded edge entirely free from loosening, warping, waving, swelling, etc.
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