Water tight watch case using an inorganic glass crystal
AssigneeKabushiki Kaisha Suwa Seikosha
InventorHideaki Uchiyama
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Abstract
A water-tight watch case having an inorganic glass crystal to which a layer of transparent or semi-transparent water-absorptive material is applied to a central region of the inner surface thereof to leave a bare peripheral region at which the crystal is hermetically sealed to the case.
Claims8
A water-tight watch case comprising an inorganic glass crystal, means hermetically sealing said crystal in a peripheral region thereof in the case, and a layer of water-absorptive resin having an unsaturated OH radical applied to said crystal at the inner surface thereof in a limited region to leave a bare peripheral zone at which the crystal is hermetically sealed, said means which hermetically seals the crystal in the case comprising a sealing element which bears against said crystal exclusively in said peripheral region where the layer of water-absorptive material is absent.
Dependencies are inferred from the claim text.