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US4440350A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus and method for coating with an atomizable material

Assignee: General Electric Co
•
Filing: 1982-02-03
•
Granted: 1984-04-03
•
Expires: 2002-02-03
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Abstract

Abstract An apparatus for applying a coating of an atomizable material, such as a phosphor slurry, to the inside surface of a glass tube comprises a rotatable member having a surface for receiving material, a device for rotating the member and conduct for delivering material to the surface of the member. The rotating and delivery mechanisms are preferably situated along the same direction as the extension of the axis of rotation through the surface of the member. The apparatus may include a device for electrically charging the material prior to coating. A method for applying the coating of atomizable material to the inside surface of a glass tube comprises positioning a rotatable member within the tube, delivering the material to a surface of the member adapted to receive the material, and rotating the member at a predetermined velocity to atomize the material and inpact the surface of the tube with at least a portion of the atomized material. A potential differnce may be established between the atomized material and the surface of the tube to improve coating efficiency. The surface of the tube may be maintained at an electrical potential, and multiple coatings may be produced.

Inventors

  • 👤 Peter W. Dietz
  • 👤 Ralph T. Wood

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 08:50
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/08; B05B5/12; B05B5/025; B05B5/04; B05B5/0403; B05D; B05D1/00; B05D1/02; B05D7/00; B05D7/22; B05D7/222; C; C03; C03C; C03C17/00; C03C17/001; C03C17/003; C03C17/004; B05B5/001; B05D1/04; B05D2203/00; B05D2203/30; B05D2203/35; B05D2254/00; B05D2254/04

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 139 words
An apparatus for applying a coating of an atomizable material to the inside surface of an elongate glass tube comprising: a rotatable member having a surface for receiving said material, said surface rotating together with said member; means for rotating said member, said means being disposed adjacent to said rotatable member; material delivery means for delivering said material to said surface of said member, said material delivering means being situated along the same direction as the extension of the axis of rotation through said surface of said member; and non-rotatable, hollow tubular support means for insertion into said glass tube, said support means having said rotating means affixed thereto at an end thereof, said support means having an opening in the end of said support means to which said rotating means is affixed, said opening facing said receiving surface.
Claim 2
Independent Claim 139 words
An apparatus for applying a coating of an atomizable material to the inside surface of an elongate glass tube comprising: a rotatable member having a surface for receiving said material, said surface rotating together with said member; means for rotating said member, said means being disposed adjacent to said rotatable member; material delivery means for delivering said material to said surface of said member, said material delivering means being situated along the same direction as the extension of the axis of rotation through said surface of said member; and non-rotatable, hollow tubular support means for insertion into said glass tube, said support means having said rotating means affixed thereto at an end thereof, said support means having an opening in the end of said support means to which said rotating means is affixed, said opening facing said receiving surface.
Claim 3
Dependent Claim 33 words
An apparatus as in claim 1 wherein said means for rotating said member is situated along the same direction as the extension of the axis of rotation through said surface of said member.
Claim 4
Dependent Claim 25 words
An apparatus as in claim 2 further comprising means for creating an electric field at least at the edge of said surface of said member.
Claim 5
Dependent Claim 28 words
An apparatus as in claim 3 wherein said means for creating an electric field includes a ring electrode spaced from the edge of said surface of said member.
Claim 6
Dependent Claim 17 words
An apparatus as in claim 2 wherein said means for rotating said member includes an air turbine.
Claim 7
Dependent Claim 30 words
The apparatus of claim 3 further including means for directing a gaseous flow through said hollow tubular support and through said opening in said tubular support facing said receiving surface.
Claim 8
Dependent Claim 39 words
An apparatus as in claim 1 wherein said material delivery means includes a conduit having an end thereof spaced from said surface of said member with said end positioned to direct said material onto said surface of said member.
Claim 9
Dependent Claim 30 words
An apparatus as in claim 7 wherein said end of said conduit is positioned to direct said material onto said surface of said member at the axis of rotation thereof.
Claim 10
Dependent Claim 20 words
The apparatus of claim 1 in which said material delivery means includes a conduit disposed within said hollow tubular support.

References Cited (Backward Citations)

US1748991A Cited
US3010428A Cited
US3029207A Cited
US3155542A Cited
US3418971A Cited
US3452931A Cited
FR2336181A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-04-03 1987-10-03 1988-04-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-04-03 1991-10-03 1992-04-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-04-03 1995-10-03 1996-04-03 $7700.00 Window Closed / Lapsed

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