US3824955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating television viewing tubes
Assignee: Individual
•
Filing: 1972-05-15
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Granted: 1974-07-23
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Expires: 1992-05-15
Abstract
Abstract A structure for applying a non-reflective coating to television viewing tubes is described. The structure includes a closed container in which a tube support may be positioned for receiving and rotating the tube and means for applying the coating as a solution on the viewing face. The viscosity of the coating solution and the speed of rotation are adjusted so that the coating is spread evenly over the tube face. The coating optionally contains a plurality of needle-shaped crystals which are normally oriented by the application of an electric field to the coating. A metal screen in the container acts as one terminal for the field while the aluminized layer on the phosphorescent coating within the tube acts as the other terminal. Various devices control the timing, speed of rotation, and the application of the solution.
Inventors
- 👤 M Marks
- 👤 A Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/896; C; C03; C03C; C03C17/00; H01J2209/00; H01J2209/01; H01J2209/012; H01J2209/015
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
An apparatus for forming a substantially uniform coating upon the viewing surface of a television tube comprising: a housing for enclosing the tube during the application of the coating, a cradle rotatably carried within the housing for supporting the tube in vertical alignment, means for rotating the cradle around the tube longitudinal axis for uniformly spreading said coating on the viewing surface of the tube, said means including an electric motor coupled to the tube cradle and braking means coupled to the tube cradle for stopping the rotation of the tube after a predetermined period of time, means for injecting a fluid coating solution through the housing onto the tube viewing surface and said injecting means including a container conduit connected to the container and a spout on said conduit positioned in axial alignment with the longitudinal axis of the tube.
Claim 2
Independent Claim
141 words
An apparatus for forming a substantially uniform coating upon the viewing surface of a television tube comprising: a housing for enclosing the tube during the application of the coating, a cradle rotatably carried within the housing for supporting the tube in vertical alignment, means for rotating the cradle around the tube longitudinal axis for uniformly spreading said coating on the viewing surface of the tube, said means including an electric motor coupled to the tube cradle and braking means coupled to the tube cradle for stopping the rotation of the tube after a predetermined period of time, means for injecting a fluid coating solution through the housing onto the tube viewing surface and said injecting means including a container conduit connected to the container and a spout on said conduit positioned in axial alignment with the longitudinal axis of the tube.
Claim 3
Dependent Claim
29 words
An apparatus in accordance with claim 1 wherein said tube cradle is removable from the container and is normally carried by a rotatable table journaled in a horizontal base.
Claim 4
Dependent Claim
22 words
An apparatus in accordance with claim 1 wherein said electric motor is coupled to the tube support through a speed changing device.
Claim 5
Dependent Claim
21 words
An apparatus in accordance with claim 1 wherein said cradle is rotated at a speed of the order of 150 RPM.
Claim 6
Dependent Claim
24 words
An apparatus in accordance with claim 1, wherein said coating is an anti-reflection coating including a polymer and a liquid solvent for said polymer.
Claim 7
Dependent Claim
14 words
An apparatus in accordance with claim 5, wherein said polymer is a transparent polymer.
Claim 8
Dependent Claim
16 words
An apparatus in accordance with claim 6, wherein said fluid includes a plurality of incompatible polymers.
Claim 9
Dependent Claim
103 words
A structure according to claim 1 in which the fluid includes a plurality of microcrystalline particles and means for applying an electric field substantially perpendicular to the viewing surface of the tube to move the said particles into orientation with respect to each other. 9. A structure as claimed in claim 8, wherein said means for applying an electric field to the solution includes an electrically conducting screen adjacent to the viewing surface of the tube as one electrode and an aluminum layer on the phosphor inside the tube as the other electrode, and an alternating voltage source connected across the two electrodes.
Claim 10
Dependent Claim
20 words
A structure according to claim 8 in which the electric field is alternating at about 10 Kc and 50 KV-rms/cm.
References Cited (Backward Citations)
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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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |