Waterproof watchcase with multi-layered resin-coated glass

Horology: time measuring systems or devices – Cases – With bezel or crystal details

Patent

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G04B 3700

Patent

active

045098662

ABSTRACT:
A waterproof watchcase-and-glass assembly has a plurality of superimposed resin layers coated on the glass in the region where the glass contacts the case to obtain a watertight connection between the case and glass. The innermost resin layer, which is in contact with the glass, has superior adhesion to glass and a lower hardness than the outermost resin layer, which is in contact with the case.

REFERENCES:
patent: 3939646 (1976-02-01), Uchiyama
patent: 4221112 (1980-09-01), Enomoto et al.
patent: 4281406 (1981-07-01), Tanaka

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