Cathode-ray tube with multi-layer resin coating on faceplate pro

Facsimile and static presentation processing – Facsimile – Recording apparatus

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Details

313477R, 313479, H01J 2987, H04N 564

Patent

active

049438620

ABSTRACT:
An implosion protected cathode ray tube which comprises a glass envelope having a faceplate; and a layered protective structure deposited over and positioned frontwardly of the faceplate. The layered protective structure includes a first resin-coated layer held in contact with the faceplate, a hard coated layer for protecting the first resin-coated layer and a second resin-coated layer formed between the first resin-coated layer and the hard coated layer. The first resin-coated layer has a hardness which corresponds to 1H or lower of hardness of drafting pencil lead, and an elongation at breakage within the range of 65 to 85%. The first resin-coated layer also has a break strength of 3.5 kilograms per square millimeter or greater. The hard coated layer has a hardness which corresponds to 5H or higher of hardness of drafting pencil lead, and an elongation of 3% or smaller at breakage. The second resin-coated layer has a hardness generally intermediate between the hardness of the first resin-coated layer and that of the hard coated layer and also an elongation at breakage generally intermediate between the elongation of the first resin-coated layer at breakage and that of the hard coated layer at breakage.

REFERENCES:
patent: 4204231 (1980-05-01), Permenter
patent: 4332329 (1982-06-01), Scriven et al.
patent: 4709272 (1987-11-01), Tischer
patent: 4739412 (1988-04-01), Lee

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