US3718117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooved rod coater
Assignee: Armstrong World Industries Inc
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Filing: 1971-04-26
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Granted: 1973-02-27
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Expires: 1991-04-26
Abstract
Abstract A coating apparatus is provided for placing a uniform coating of particulate-containing material. A grooved rod is held against the sheet to be coated by action of a magnet on the back side of the sheet to be coated. The grooves in the rod permit the controlled application of a coating containing particles.
Inventors
- 👤 W Lewicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:14
CPC Classifications
B; B05; B05C; B05C11/00; B05C11/02; B05C11/023; B05C11/025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A coating apparatus which comprises a flat surface conveyor table, on one surface of the conveyor table there is positioned a means for developing magnetic force, on the opposite side of the table there is placed a material for receiving a coating, a freely rotatable grooved rod is placed on top of the material for receiving the coating and the magnetic attraction of the magnetic generating means under the table attracts the grooved rod to hold it against the surface of the material to be coated and the rod rotates due to movement of the material, sAid grooved rod having a plurality of raised and lowered areas wherein the raised areas only are always in contact with the surface to be coated and the lowered areas provide a spacing between the grooved rod and the material to be coated, said configuration of the lowered areas controlling the thickness of the coating.
Claim 2
Dependent Claim
151 words
A coating apparatus which comprises a flat surface conveyor table, on one surface of the conveyor table there is positioned a means for developing magnetic force, on the opposite side of the table there is placed a material for receiving a coating, a freely rotatable grooved rod is placed on top of the material for receiving the coating and the magnetic attraction of the magnetic generating means under the table attracts the grooved rod to hold it against the surface of the material to be coated and the rod rotates due to movement of the material, sAid grooved rod having a plurality of raised and lowered areas wherein the raised areas only are always in contact with the surface to be coated and the lowered areas provide a spacing between the grooved rod and the material to be coated, said configuration of the lowered areas controlling the thickness of the coating.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein the space between the grooved rod and the material to be coated functionsas a means for the passage of particles in the coating material.
Claim 4
Dependent Claim
28 words
The apparatus of claim 1 wherein the space between the material to be coated and the grooved rod functions as a passageway means for strands of fibrous material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |