发明名称 Video cassette expandable from a condition of reduced thickness to an operating thickness
摘要 A video cassette which is collapsible to a reduced thickness for mailing purposes. The upper surface moves from a lower mailing position in which it bears tightly against the tape spools to an upper operating position. Preferably it is provided with pivoting ends which rotate to the upper position to provide a rigid frame for the operating cassette.
申请公布号 US5257752(A) 申请公布日期 1993.11.02
申请号 US19910710741 申请日期 1991.06.05
申请人 WILLIAMSON, KYLE L.;WILLIAMSON, KEVIN M. 发明人 WILLIAMSON, KYLE L.;WILLIAMSON, KEVIN M.
分类号 G11B23/087;(IPC1-7):G11B23/087 主分类号 G11B23/087
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