US4537640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rinsing of articles to remove an adhering substance
Assignee: Bayer Pharma AG
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Filing: 1981-09-23
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Granted: 1985-08-27
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Expires: 2001-09-23
Abstract
Abstract Articles which require the removal of an adhering substance, such as residue of a galvanizing bath, are rinsed by spraying an aqueous rinsing agent against them repeatedly. Each spraying interval is followed by a run-off interval during which the sprayed-on rinsing agent can run off the articles. The length of the run-off intervals is equal to, or greater than, the length of the spraying intervals.
Inventors
- 👤 Rudolf Kreisel
- 👤 Walter Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:16
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A method of rinsing articles to remove an adhering substance, particularly subsequent to chemical or electrochemical surface treatment of the articles, comprising the steps of positioning an article to be rinsed in a confined space; spraying a rinsing agent onto the article at a pressure of between substantially 2 and 6 bar for a first period of time corresponding to between substantially 0.1 and 5 seconds to remove an adhering substance from a surface of the article with keeping the surface intact; terminating the spraying and allowing the rinsing agent to run off the article for a second period of time corresponding to between substantially 1 and 10 seconds and which is at least substantially equal to or greater than said first period; and repeating the spraying and terminating steps with the same time periods.
Claim 2
Independent Claim
135 words
A method of rinsing articles to remove an adhering substance, particularly subsequent to chemical or electrochemical surface treatment of the articles, comprising the steps of positioning an article to be rinsed in a confined space; spraying a rinsing agent onto the article at a pressure of between substantially 2 and 6 bar for a first period of time corresponding to between substantially 0.1 and 5 seconds to remove an adhering substance from a surface of the article with keeping the surface intact; terminating the spraying and allowing the rinsing agent to run off the article for a second period of time corresponding to between substantially 1 and 10 seconds and which is at least substantially equal to or greater than said first period; and repeating the spraying and terminating steps with the same time periods.
Claim 3
Dependent Claim
19 words
A method as defined in claim 1, wherein different quantities of rinsing agent are used during different spraying steps.
Claim 4
Dependent Claim
38 words
A method as defined in claim 1, wherein the quantities of rinsing agent sprayed onto the article during different spraying steps are varied by changing the length of said first perid of time during the respective spraying steps.
Claim 5
Dependent Claim
19 words
A method as defined in claim 1, wherein the spraying is carried out with water as the rinsing agent.
Claim 6
Dependent Claim
29 words
A method as defined in claim 1, wherein the steps of terminating comprise directing a blast of pressurized gas against the article to facilitate running-off of the rinsing agent.
Claim 7
Dependent Claim
40 words
A method as defined in claim 1, wherein each step of spraying is carried out by directing sprays from opposite sides against the article, the sprays from one side being time-delayed with reference to the sprays from the other side.
Claim 8
Dependent Claim
39 words
A method as defined in claim 1, wherein each step of spraying is carried out by directing sprays from opposite sides against the article, and comprising the step of varying the position of the sprays relative to the article.
Claim 9
Dependent Claim
18 words
A method as defined in claim 1, wherein the spraying is carried out with an aqueous rinsing agent.
Claim 10
Independent Claim
103 words
A method of rinsing articles to remove an adhering substance particularly subsequent to chemical or electrochemical surface treatment of the articles, comprising the steps of positioning an article to be rinsed in a confined space; spraying a rinsing agent onto the article at a pressure of 3.5 bar for a first period of 1.5 seconds to remove an adhering substance from a surface of the article with keeping the surface intact; terminating the spraying and allowing the rinsing agent to run off the article for a second period of 5 seconds and repeating the spraying and terminating steps with the same time periods.
Claim 11
Independent Claim
103 words
A method of rinsing articles to remove an adhering substance particularly subsequent to chemical or electrochemical surface treatment of the articles, comprising the steps of positioning an article to be rinsed in a confined space; spraying a rinsing agent onto the article at a pressure of 3.5 bar for a first period of 1.5 seconds to remove an adhering substance from a surface of the article with keeping the surface intact; terminating the spraying and allowing the rinsing agent to run off the article for a second period of 5 seconds and repeating the spraying and terminating steps with the same time periods.
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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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |