US3791342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective coating
Assignee: AT&T Inc
•
Filing: 1972-06-06
•
Granted: 1974-02-12
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Expires: 1992-06-06
Abstract
Abstract A rotatable vacuum spindle supports a substrate thereon. Means coat the substrate on the non-supported face. Means rotate the spindle and substrate thereon at a speed whereby to distribute the coating material. Means disposed about the spindle direct an annular fluid stream outwardly and against the supported face of the substrate whereby to prevent creep of the coating material onto said supported face.
Inventors
- 👤 L Boyer
- 👤 A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:00
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16; G03F7/162; B; B05; B05C; B05C11/00; B05C11/02; B05C11/08; H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6326; H10P14/6342; Y; Y10; Y10S; Y10S438/00; Y10S438/942; Y10S438/948
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
97 words
An apparatus for selectively coating a workpiece, comprising: a hollow tuBular member having a free end; means for producing a vacuum in the tubular member to hold one side of the workpiece on the free end thereof; means for applying coating material to the opposite side of the workpiece; means for rotating the tubular member to spread the material on the workpiece; means, positioned around the tubular member, for forcing a fluid under pressure, in an annular pattern, against the held side of the workpiece to prevent the material from coating such held side of the workpiece.
Claim 2
Independent Claim
97 words
An apparatus for selectively coating a workpiece, comprising: a hollow tuBular member having a free end; means for producing a vacuum in the tubular member to hold one side of the workpiece on the free end thereof; means for applying coating material to the opposite side of the workpiece; means for rotating the tubular member to spread the material on the workpiece; means, positioned around the tubular member, for forcing a fluid under pressure, in an annular pattern, against the held side of the workpiece to prevent the material from coating such held side of the workpiece.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1, wherein the means for forcing the fluid against the workpiece is an annular fluid projecting vent positioned adjacent the portion of the workpiece.
Claim 4
Independent Claim
143 words
An apparatus for coating with a masking material a substrate having a face and a backside opposite its face, comprising: a hollow tubular member having a free end for holding the backside of the substrate; means for producing a vacuum at the opposite end of the tubular member to hold the substrate on the free end thereof; means, positioned around the tubular member, for forcing a gas under pressure, in an annular pattern, against the backside of the substrate; means for flooding the face of the substrate with the masking material; and means for rotating the tubular member to spin the substrate to thereby spread the masking material on the face thereof, the gas under pressure preventing the material from contacting the the backside of the substrate and aiding the vacuum in holding the substrate to the free end of the tubular member.
Claim 5
Independent Claim
143 words
An apparatus for coating with a masking material a substrate having a face and a backside opposite its face, comprising: a hollow tubular member having a free end for holding the backside of the substrate; means for producing a vacuum at the opposite end of the tubular member to hold the substrate on the free end thereof; means, positioned around the tubular member, for forcing a gas under pressure, in an annular pattern, against the backside of the substrate; means for flooding the face of the substrate with the masking material; and means for rotating the tubular member to spin the substrate to thereby spread the masking material on the face thereof, the gas under pressure preventing the material from contacting the the backside of the substrate and aiding the vacuum in holding the substrate to the free end of the tubular member.
Claim 6
Dependent Claim
136 words
An improved apparatus for coating a substrate having a face and a backside opposite the face, wherein a hollow tubular member has a free end for holding the backside of the substrate, wherein means produce a vacuum at the end of the member opposite the free end to hold the substrate on the free end thereof, wherein a material is applied to the face of the substrate, and wherein the improvement comprises: means for rotating the tubular member to spread the material on the workpiece; and means positioned around the tubular member, for forcing a fluid under pressure, in an annular pattern, against the backside of the substrate, the fluid preventing the material from contacting the backside of the substrate and aiding the vacuum in holding the substrate to the free end of the tubular member.
Claim 7
Dependent Claim
136 words
An improved apparatus for coating a substrate having a face and a backside opposite the face, wherein a hollow tubular member has a free end for holding the backside of the substrate, wherein means produce a vacuum at the end of the member opposite the free end to hold the substrate on the free end thereof, wherein a material is applied to the face of the substrate, and wherein the improvement comprises: means for rotating the tubular member to spread the material on the workpiece; and means positioned around the tubular member, for forcing a fluid under pressure, in an annular pattern, against the backside of the substrate, the fluid preventing the material from contacting the backside of the substrate and aiding the vacuum in holding the substrate to the free end of the tubular member.
Claim 8
Dependent Claim
10 words
The apparatus of claim 4, wherein the fluid is gas.
Claim 9
Dependent Claim
29 words
The apparatus of claim 4, wherein the means for forcing the fluid against the backside of the substrate is a fluid projecting vent formed circumferentially about the tubular member.
Claim 10
Dependent Claim
46 words
The apparatus of claim 5, wherein the fluid projecting vent is a nozzle located circumferentially about and spaced from the tubular member and is formed by an upper beveled flange of an inner tubular member and by a coacting chamfered portion of an outer tubular member.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |