US3558818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of strengtherning a television display tube
Assignee: US Philips Corp
•
Filing: 1968-01-08
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Granted: 1971-01-26
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Expires: 1988-01-08
Abstract
Abstract A method of strengthening a cathode-ray tube against implosion in which a metal band and the conical portion of the cathode-ray tube adjoining the window are provided with an adhesive layer containing a reducing agent compatible with a redox system used to harden a combination of a polyester and a monomer. The metal band is placed around the conical portion of the tube and the space therebetween filled with a polyester, a monomer, a redox system, and a filler. The polyester mass is subsequently hardened at ambient temperatures.
Inventors
- 👤 Floris Deboer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:22
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/87
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A method of strengthening a television display tube having a substantially rectangular window closing one end of a conical portion for the purpose of reducing the risk of implosion comprising the steps of applying to a surface of a metallic band and the surface of the conical portion adjoining the window an adhesive layer containing a reducing agent for hardening a polyester mass, surrounding the conical portion covered with said adhesive layer with said metallic band leaving a space therebetween, filling said space between the metallic band and the conical portion with a mixture consisting of an unsaturated polyester resin, a monomer which is polymerisable therewith, a redox system and a filler, and hardening the mixture at room temperature.
Claim 2
Independent Claim
119 words
A method of strengthening a television display tube having a substantially rectangular window closing one end of a conical portion for the purpose of reducing the risk of implosion comprising the steps of applying to a surface of a metallic band and the surface of the conical portion adjoining the window an adhesive layer containing a reducing agent for hardening a polyester mass, surrounding the conical portion covered with said adhesive layer with said metallic band leaving a space therebetween, filling said space between the metallic band and the conical portion with a mixture consisting of an unsaturated polyester resin, a monomer which is polymerisable therewith, a redox system and a filler, and hardening the mixture at room temperature.
Claim 3
Dependent Claim
32 words
A method of strengthening a television display tube as claimed in claim 1 in which the reducing agent contained in the adhesive layer is the same as that in the redox system.
Claim 4
Dependent Claim
21 words
A method of strengthening a television display tube as claimed in claim 2 in which the reducing agent is dimethyl paratoluidine.
References Cited (Backward Citations)
US3220592A
Cited
US3412203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |