| 摘要 |
<p>A durable and low cost holder for magnetic tape cassettes is for postal use and is water and dust tight. Although not exclusively so, the holder is partic. suited to use by the blind. The holder consists of three main components; a lid, a base and an address card or label holder. The moulded base has four locating pillars positioned to receive two cassette stacks. Rigidity is enhanced by ribs running the length of the base. The moulded cover has two pairs of flaps with one pair acting as hinges and the other pair as retaining straps. Projecting studs locate in mating holes on the base. The address panel has a series of press studs for securing to the cover.</p> |
