Patent US4775011A successfully refreshed from Google Patents.
Patent US4186225A successfully refreshed from Google Patents.
US4186225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating the interior surfaces of a hollow article
Assignee: Primerica Inc
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Filing: 1978-03-22
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Granted: 1980-01-29
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Expires: 1998-03-22
Abstract
Abstract Two spray coatings are successively applied, without an intervening curing step, to coat the inside surface of a shell for a two-piece can. This "wet-on-wet" coating technique utilizes zone spraying, wherein only the sidewall is covered during the first application, with the second coat being applied to all inside surfaces.
Inventors
- 👤 Jack L. Smith
- 👤 Leon W. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:31
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/22; B05B; B05B13/00; B05B13/06; B05B13/0627; Y; Y10; Y10S; Y10S118/00; Y10S118/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
A method of coating the interior surfaces of a hollow one-piece container comprised of a generally cylindrical sidewall having one end open, and an end wall closing the opposite end thereof, said sidewall and end wall being integrally formed from a thin steel blank, comprising the steps of; spraying liquid coating material into said article through said open end thereof to produce one deposit therewithin, said one deposit being confined substantially to the entire inside surface of said sidewall and subsequently to produce another deposit, said another deposit covering primarily the entire inside surface of said end wall and the inside surface of said sidewall to produce a final deposit of substantially uniform thickness extending completely over said sidewall and said end wall, said spraying to produce each said deposit being effected for a period of about 1 to 4 revolutions of said container with said container being rotated about its longitudinal axis and with said coating material at a temperature of about 20°to 85° Celsius; and subsequently effecting the initial and concurrent solidification of both deposits to produce a substantially uniform, void-free coating.
Claim 2
Independent Claim
184 words
A method of coating the interior surfaces of a hollow one-piece container comprised of a generally cylindrical sidewall having one end open, and an end wall closing the opposite end thereof, said sidewall and end wall being integrally formed from a thin steel blank, comprising the steps of; spraying liquid coating material into said article through said open end thereof to produce one deposit therewithin, said one deposit being confined substantially to the entire inside surface of said sidewall and subsequently to produce another deposit, said another deposit covering primarily the entire inside surface of said end wall and the inside surface of said sidewall to produce a final deposit of substantially uniform thickness extending completely over said sidewall and said end wall, said spraying to produce each said deposit being effected for a period of about 1 to 4 revolutions of said container with said container being rotated about its longitudinal axis and with said coating material at a temperature of about 20°to 85° Celsius; and subsequently effecting the initial and concurrent solidification of both deposits to produce a substantially uniform, void-free coating.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said one deposit is applied just prior to said another deposit and both deposits are applied before effecting solidification of either.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the configuration of the spraying pattern employed to produce each said deposit is sector-shaped.
Claim 5
Dependent Claim
57 words
The method of claim 2 wherein the rates of material delivery within said sector-shaped spraying patterns vary from minimum values at the margins to maximum values therebetween, the maximum value of material delivery occurring along a radius which lies at a point which is about 65 to 95 percent of the total arc distance between said margins.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein said coating material has a viscosity in the range of about 10 to 250 centipoises at the temperature of application.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein said coating material has a viscosity in the range of about 15 to 50 centipoises at the temperature of application.
Claim 8
Dependent Claim
65 words
The method of claim 1 wherein the total weight of the coating material applied to produce said one deposit and said another deposit is about 120 to 200 milligrams and 80 to 150 milligrams, respectively, and wherein no more than about 10 percent of the total weight of the material applied to produce said one deposit is deposited on said end wall of said body.
Claim 9
Dependent Claim
35 words
The method of claim 1 wherein said one deposit and said another deposit cooperatively produce a substantially uniform and void-free coating having an average weight distribution of about five to eight milligrams per square inch.
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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |