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Box for reserving cassette or cartridge

  • US 4,216,857 A
  • Filed: 04/19/1979
  • Issued: 08/12/1980
  • Est. Priority Date: 04/19/1979
  • Status: Expired due to Term
First Claim
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1. A box for reserving an encased magnetic recording tape, comprising:

  • a shield having rails and flanges positioned on its top wall, said rails and flanges corresponding to channels and concavities on its bottom wall, said bottom wall having a hole therein, said shield further comprising a back wall and side walls interconnecting said top and bottom walls, said side walls having flat outer surfaces;

    a drawer insertable within said shield, said drawer providing a space for reserving said encased magnetic recording tape, said drawer having a front wall for covering an open end of said shield, a rear wall, and a bottom bed portion, said bed portion having a groove on its underside;

    a spring positioned between said back wall of said shield and said rear wall of said drawer; and

    a steel ball being positioned partially within said hole and partially within said groove, wherein when said drawer is inserted within shield said steel ball is moved along a longitudinal portion of said groove while being held within said hole until said ball reaches a stopping point in said groove at the front end of said groove, whereby said drawer is held in a closed position with said spring forcing said drawer outward until an inward force is applied against said spring causing said ball to be moved from said stopping point and allowing said ball to move within said longitudinal portion of said groove so that said drawer is opened.

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