Patent US3797456A successfully refreshed from Google Patents.
US3797456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating the interiors of hollow bodies
Assignee: Nordson Corp
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Filing: 1971-11-26
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Granted: 1974-03-19
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Expires: 1991-11-26
Abstract
Abstract Apparatus for coating the interior cylindrical surface of objects such as metal cans for food, beverages and other substances which need protection against injurious reaction with or pollution from contact with the material of the can. Airless spray coating of such surfaces revolving at high speed by stationary spray nozzles external of the can. The nozzles project impinging airless sprays having desirable patterns through respective ends of open ended can cylinders into longitudinally elongated contact with the interior surface.
Inventors
- 👤 E Hogstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:04
CPC Classifications
B; B05; B05B; B05B13/00; B05B13/06; B05B13/0609; B05B1/00; B05B1/02; B05B1/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
Apparatus for coating the interior surface of a cylindrical object having open ends comprising, in combination, means for rotating said object about its own axis, a first airless spray nozzle positioned adjacent a first open end of said rotating object, a second airless spray nozzle positioned adjacent a second open end of said rotating object, said first and second spray nozzles being oriented so that their axes are disposed at angles to the rotational axis of the object to direct their sprays of coating material simultaneously through opposite open ends of the object, the angular orientation of each nozzle being such that the spray from each nozzle falls short of the open end of the object which is disposed remote from the respective nozzle from which the spray is projected.
Claim 2
Dependent Claim
130 words
Apparatus for coating the interior surface of a cylindrical object having open ends comprising, in combination, means for rotating said object about its own axis, a first airless spray nozzle positioned adjacent a first open end of said rotating object, a second airless spray nozzle positioned adjacent a second open end of said rotating object, said first and second spray nozzles being oriented so that their axes are disposed at angles to the rotational axis of the object to direct their sprays of coating material simultaneously through opposite open ends of the object, the angular orientation of each nozzle being such that the spray from each nozzle falls short of the open end of the object which is disposed remote from the respective nozzle from which the spray is projected.
Claim 3
Dependent Claim
25 words
The apparatus as defined in claim 1 wherein said first and second spray nozzles are provided with orifices that produce flat, fan shaped spray patterns.
Claim 4
Dependent Claim
33 words
The apparatus as defined in claim 1 further comprising means connected to said rotating means for causing said object to roll about its own axis to allow said coating material to partially dry.
Claim 5
Dependent Claim
31 words
The apparatus as defined in claim 3 further comprising an oven connected to said rolling means for receiving said object and applying heat thereto to allow the coating material to solidify.
Claim 6
Dependent Claim
22 words
The apparatus of claim 1 in which said spray projecting means directs said spray from said pair of nozzles into mutual impingement.
Claim 7
Dependent Claim
98 words
Apparatus for coating the interior surface of a cylindrical object having open ends comprising, in combination, means for rotating said object about its own axis, a first spray nozzle positioned adjacent a first open end of said rotating object, a second spray nozzle positioned adjacent a second open end of said rotating object, said first and second spray nozzles being oriented to spray coating material through opposite open ends of said rotating object into angular longitudinally elongated contact with the interior thereof and being oriented so that the sprays therefrom are directed into aligned opposition and mutual impingement.
Claim 8
Dependent Claim
98 words
Apparatus for coating the interior surface of a cylindrical object having open ends comprising, in combination, means for rotating said object about its own axis, a first spray nozzle positioned adjacent a first open end of said rotating object, a second spray nozzle positioned adjacent a second open end of said rotating object, said first and second spray nozzles being oriented to spray coating material through opposite open ends of said rotating object into angular longitudinally elongated contact with the interior thereof and being oriented so that the sprays therefrom are directed into aligned opposition and mutual impingement.
Claim 9
Dependent Claim
118 words
Apparatus for coating the interior surface of a cylindrical object having open ends comprising, in combination, means for rotating said object about its own axis, a first spray nozzle positioned adjacent a first open end of said rotating object, a second spray nozzle positioned adjacent a second open end of said rotating object, said first and second spray nozzles being oriented to spray coating material through opposite open ends of said rotating object into angular longitudinally elongated contact with the interior thereof, said first and second spray nozzles being provided with orifices that produce flat fan-shaped spray patterns which are skewed so that the point of maximum output in each pattern is adjacent one end of the fan.
Claim 10
Dependent Claim
118 words
Apparatus for coating the interior surface of a cylindrical object having open ends comprising, in combination, means for rotating said object about its own axis, a first spray nozzle positioned adjacent a first open end of said rotating object, a second spray nozzle positioned adjacent a second open end of said rotating object, said first and second spray nozzles being oriented to spray coating material through opposite open ends of said rotating object into angular longitudinally elongated contact with the interior thereof, said first and second spray nozzles being provided with orifices that produce flat fan-shaped spray patterns which are skewed so that the point of maximum output in each pattern is adjacent one end of the fan.
Claim 11
Dependent Claim
41 words
The apparatus as defined in claim 7 wherein said first and second spray nozzles are positioned so that the point of maximum output in each spray pattern is nearer the end of the object remote from the nozzle providing the pattern.
Claim 12
Dependent Claim
29 words
The apparatus as defined in claim 8 wherein said spray patterns overlap and impinge over a portion of the width of each pattern adjacent the point of maximum output.
Claim 13
Dependent Claim
17 words
The apparatus as defined in claim 9 wherein said first and second spray nozzles are drumhead nozzles.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |