US3808769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal device closure method
Assignee: RCA Corp
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Filing: 1972-09-05
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Granted: 1974-05-07
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Expires: 1992-09-05
Abstract
Abstract A method of closing a liquid crystal device after filling its substrate interspace with the liquid crystal material through a hole in one of the substrates, comprising introducing a particle of malleable, non-reactive material into the hole and then shaping the particle to conform with the peripheral surface of the hole. The particle may be made of a soft metal such as lead and shaped by forcing a swage thereagainst. The resultant plug hermetically seals the hole without increasing the thickness of the device.
Inventors
- 👤 A Gardiner
- 👤 H Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1341; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/49943
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
In the fabrication of a liquid crystal device comprising a pair of spaced-apart, hermetically-sealed substrates and a liquid crystal material therebetween, one of said substrates having a hole therethrough communicating with the substrate interspace, the method of closing said device comprising the steps of: a. introducing a particle of malleable material into said hole and in contact with the surface of the other of said substrates opposite said hole, said malleable material being nonreactive with said liquid crystal material; and b. plastically deforming said particle in said hole to comform said particle with the peripheral surface of said hole.
Claim 2
Dependent Claim
99 words
In the fabrication of a liquid crystal device comprising a pair of spaced-apart, hermetically-sealed substrates and a liquid crystal material therebetween, one of said substrates having a hole therethrough communicating with the substrate interspace, the method of closing said device comprising the steps of: a. introducing a particle of malleable material into said hole and in contact with the surface of the other of said substrates opposite said hole, said malleable material being nonreactive with said liquid crystal material; and b. plastically deforming said particle in said hole to comform said particle with the peripheral surface of said hole.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein said malleable material is selected from the group consisting of lead, copper, gold, indium, and alloys thereof.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein said particle is shaped by swaging.
Claim 5
Dependent Claim
115 words
In the fabrication of a liquid crystal device comprising a pair of spaced-apart, hermetically-sealed substrates and a liquid crystal material therebetween, one of said substrates having at least one cylindrical hole therethrough communicating with the substrate interspace, the method of closing said device comprising the steps of: a. introducing a particle of malleable metal into said hole, and in contact with the surface of the other of said substrates opposite said hole, said malleable metal being non-reactive with said liquid crystal material; and b. forcing a swage thereagainst to conform said particle with the peripheral surface of said hole and to enlarge the portion of said particle in said interspace to a somewhat bulbous configuration.
Claim 6
Dependent Claim
115 words
In the fabrication of a liquid crystal device comprising a pair of spaced-apart, hermetically-sealed substrates and a liquid crystal material therebetween, one of said substrates having at least one cylindrical hole therethrough communicating with the substrate interspace, the method of closing said device comprising the steps of: a. introducing a particle of malleable metal into said hole, and in contact with the surface of the other of said substrates opposite said hole, said malleable metal being non-reactive with said liquid crystal material; and b. forcing a swage thereagainst to conform said particle with the peripheral surface of said hole and to enlarge the portion of said particle in said interspace to a somewhat bulbous configuration.
Claim 7
Dependent Claim
11 words
The method of claim 4, wherein said malleable metal is lead.
Claim 8
Dependent Claim
12 words
The method of claim 4, wherein said particle is spherical in form.
Claim 9
Dependent Claim
12 words
The method of claim 4, wherein said particle is disc-like in form.
Claim 10
Dependent Claim
16 words
The method of claim 4, wherein said swage comprises a cylindrical rod having a domed end.
Claim 11
Dependent Claim
17 words
The method of claim 4, wherein said swaging force is applied in both normal and rotational directions.
Claim 12
Dependent Claim
106 words
In the fabrication of a liquid crystal device comprising a pair of spaced-apart, hermetically-sealed substraTes and a liquid crystal material therebetween, one of said substrates having two cylindrical holes therethrough communicating with the substrate interspace, the method of closing said device comprising the steps of: a. introducing a particle of lead into each of said holes and in contact with the surface of the other of said substrates opposite said hole, and b. forcing a swage thereagainst to conform each particle with the peripheral surface of its containing hole and to enlarge the portion of each said particle in said interspace to a somewhat bulbous configuration.
Claim 13
Dependent Claim
106 words
In the fabrication of a liquid crystal device comprising a pair of spaced-apart, hermetically-sealed substraTes and a liquid crystal material therebetween, one of said substrates having two cylindrical holes therethrough communicating with the substrate interspace, the method of closing said device comprising the steps of: a. introducing a particle of lead into each of said holes and in contact with the surface of the other of said substrates opposite said hole, and b. forcing a swage thereagainst to conform each particle with the peripheral surface of its containing hole and to enlarge the portion of each said particle in said interspace to a somewhat bulbous configuration.
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |