US4593228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated electroluminescent lamp structure and method of manufacturing
Assignee: Stanley Electric Co Ltd
•
Filing: 1984-05-15
•
Granted: 1986-06-03
•
Expires: 2004-05-15
Abstract
Abstract The improvement in an electroluminescent lamp and the method of making same, including providing a polymer on the lamp structure and encapsulating the lamp with the polymer in a hard surface moisture impervious layer on each side of the device through the application of pressure and heat at selected conditions of pressure and temperature.
Inventors
- 👤 Loren R. Albrechtson
- 👤 Robert B. Reif
- 👤 William B. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/10; H05B33/02; H05B33/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
In an electroluminescent device comprising operative materials including a conductive window layer with an electroluminescent material layer applied thereto, a dielectric resistant material layer applied thereto, and a conductive layer applied thereto, the improvement comprising: a. a layer of waxy polymer laminated on each side of the operative materials of the device, and b. a layer of hard surface moisture impervious resin material laminated and heat sealed on the outside of the polymer layers and around the outside edges of the device, to form a moisture impervious and encapsulated unified assembly substantially free of moisture.
Claim 2
Dependent Claim
95 words
In an electroluminescent device comprising operative materials including a conductive window layer with an electroluminescent material layer applied thereto, a dielectric resistant material layer applied thereto, and a conductive layer applied thereto, the improvement comprising: a. a layer of waxy polymer laminated on each side of the operative materials of the device, and b. a layer of hard surface moisture impervious resin material laminated and heat sealed on the outside of the polymer layers and around the outside edges of the device, to form a moisture impervious and encapsulated unified assembly substantially free of moisture.
Claim 3
Dependent Claim
19 words
The improvement according to claim 1 wherein the hard surface moisture resistant material is a fluorinated chlorinated resin film.
Claim 4
Dependent Claim
31 words
The improvement according to claim 1 wherein the waxy polymer layer is about 5 mils thick and the layer of hard surface moisture impervious resin material is about 7.5 mils thick.
Claim 5
Independent Claim
121 words
The method of manufacturing an electroluminescent device including sequentially: (1) In a heated oven; a. Applying an electroluminescent material upon a translucent conductive film material; b. applying a dielectric/resistance material upon the electroluminescent material; c. applying a conductive coating material upon the dielectric/resistance material; d. applying a waxy polymer material on both sides of the assembly of a, b, and c and encapsulating the device by laminating a hard surface moisture impervious material upon each side of the device; and (2) Removing the assembly from the heated oven and while still heated applying a pressure upon the surface of each side of the assembly thereby, heat sealing and bonding the waxy polymer and encapsulating layers to each side of the device.
Claim 6
Independent Claim
121 words
The method of manufacturing an electroluminescent device including sequentially: (1) In a heated oven; a. Applying an electroluminescent material upon a translucent conductive film material; b. applying a dielectric/resistance material upon the electroluminescent material; c. applying a conductive coating material upon the dielectric/resistance material; d. applying a waxy polymer material on both sides of the assembly of a, b, and c and encapsulating the device by laminating a hard surface moisture impervious material upon each side of the device; and (2) Removing the assembly from the heated oven and while still heated applying a pressure upon the surface of each side of the assembly thereby, heat sealing and bonding the waxy polymer and encapsulating layers to each side of the device.
Claim 7
Dependent Claim
30 words
The process according to claim 4 wherein the device is further heat sealed at the edges by the application of additional pressure while maintaining the device at an elevated temperature.
Claim 8
Dependent Claim
36 words
The process according to claim 4 wherein the oven temperature is about 212° F. (100° C.), and step (2) is carried out by applying a pressure of about 50 psi upon the surface of each side.
Claim 9
Dependent Claim
45 words
The process acording to claim 6 wherein the device is further heat sealed at the edges by the application of pressure of about 50 psi while maintaining the device at a temperature of about 600° F. (121° C.) for a period of about three seconds.
References Cited (Backward Citations)
US2838715A
Cited
US3350596A
Cited
US3205393A
Cited
US2840741A
Cited
US3070722A
Cited
US3238407A
Cited
US2944177A
Cited
US2951169A
Cited
US3023338A
Cited
US3243629A
Cited
US3177391A
Cited
US3246193A
Cited
US3281619A
Cited
US3219865A
Cited
US3379915A
Cited
US3509401A
Cited
US4020389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |