US4056881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing electro-optical cell
Assignee: Rank Organization Ltd
•
Filing: 1976-04-09
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Granted: 1977-11-08
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Expires: 1996-04-09
Abstract
Abstract A method of manufacturing an electro-optical cell in which at least one insulating lamina of adhesive material bonded to at least one spacer element and having an opening defining the limits of the cell is introduced between two cell walls, and the walls are then heated and compressed to soften the adhesive material and seal the cell. The cell may have a spacer element in the form of a lamina of plastics material or may have a number of metallic spacer elements which provide electrical connections to conductive elements carried on a wall of the cell.
Inventors
- 👤 Ian Holt
- 👤 Hugh Andrew Pincherle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:51
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/1345; G02F1/13392; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A method of manufacturing an electro-optical cell having parallel spaced-apart walls wherein at least one spacing element bonded to at least one insulating lamina, of an adhesive material which may readily be softened, is introduced between two cell walls and the at least one lamina is then softened to seal the cell walls and to cause the cell wall spacing to be determined substantially by the thickness of the spacer element or elements.
Claim 2
Independent Claim
73 words
A method of manufacturing an electro-optical cell having parallel spaced-apart walls wherein at least one spacing element bonded to at least one insulating lamina, of an adhesive material which may readily be softened, is introduced between two cell walls and the at least one lamina is then softened to seal the cell walls and to cause the cell wall spacing to be determined substantially by the thickness of the spacer element or elements.
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein the at least one lamina is made of thermoplastic material.
Claim 4
Dependent Claim
22 words
A method according to claim 1, wherein the cell walls are pressed together and heated to soften the at least one lamina.
Claim 5
Dependent Claim
24 words
A method according to claim 1, wherein one said lamina which acts as a support for a number of metallic spacing elements is employed.
Claim 6
Dependent Claim
35 words
A method according to claim 4, wherein the metallic spacer elements comprise electrical conductors which upon assembly of the cell make electrical connections to contacts on an internal surface of at least one cell wall.
Claim 7
Dependent Claim
44 words
A method according to claim 1, wherein use is made of a spacer element in the form of a plastics film to both surfaces of which there is applied a lamina of adhesive material which softens at a lower temperature than the said film.
Claim 8
Dependent Claim
56 words
A method according to claim 6, wherein, before use, the plastics film is passed through a bath containing a solution of the adhesive material in a volatile solvent to coat the film with the solution, and the solvent is then evaporated to leave a lamina of the adhesive material on both faces of the plastics film.
Claim 9
Dependent Claim
55 words
A method according to claim 7 wherein a plastics film having a thickness of the order of 8 microns is used and it is passed through the solution of adhesive material in such a way as to take up laminae of adhesive material each having a thickness when dry of the order of 81/2 microns.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |