US4995273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of an apparatus for weather resistance test
Assignee: Dainippon Plastics Co Ltd
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Filing: 1989-05-18
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Granted: 1991-02-26
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Expires: 2009-05-18
Abstract
Abstract A method of and apparatus for weather resistance test comprising a process for washing the surface of samples with a cleaner which is added at least between a process for condensing moisture on the surface of the sample after ultraviolet radiation has been applied and the process for again applying ultraviolet radiation after the process for condensing moisture. Impurities adhered to the surface of the sample and substances extracted on the surface of the sample can be removed by washing with the cleaner so that the surface of the sample to which these impurities and substances are adhered intact can be protected from being baked in the ensuing ultraviolet radiation application process. Consequently, generation of spot patterns and excessive color change of the surface of the sample can be prevented.
Inventors
- 👤 Yoshio Kisima
- 👤 Teruo Iwanaga
- 👤 Hitoshi Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:47
CPC Classifications
G; G01; G01N; G01N17/00; G01N17/004
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
147 words
An apparatus for performing weather resistance test on a sample surface comprising: means for holding a sample having a surface to be tested; means including a source of ultraviolet light for applying ultraviolet rays to said sample surface; means including a source of moisture of condensing moisture on the surface of said sample; means for washing said surface of said sample with a cleaner; and means for controlling a repetitive cycle of operation of each of said means such that said ultraviolet light source is turned on for a first period of time after which the application of ultraviolet rays is terminated, whereafter said condensing means is operated for a second period of time after which the condensing is concluded, and said washing means is operated at least for a time between the time said condensing operation is concluded and said ultraviolet light source is turned on.
Claim 2
Independent Claim
147 words
An apparatus for performing weather resistance test on a sample surface comprising: means for holding a sample having a surface to be tested; means including a source of ultraviolet light for applying ultraviolet rays to said sample surface; means including a source of moisture of condensing moisture on the surface of said sample; means for washing said surface of said sample with a cleaner; and means for controlling a repetitive cycle of operation of each of said means such that said ultraviolet light source is turned on for a first period of time after which the application of ultraviolet rays is terminated, whereafter said condensing means is operated for a second period of time after which the condensing is concluded, and said washing means is operated at least for a time between the time said condensing operation is concluded and said ultraviolet light source is turned on.
Claim 3
Dependent Claim
49 words
An apparatus for performing weather resistance tests according to claim 1, wherein said means for applying ultraviolet rays comprises a metal halide lamp radiating energy predominantly in a wavelength region from 300 to 450 nm and a filter for restricting said wavelength region to substantially 300 to 450 nm.
Claim 4
Dependent Claim
28 words
An apparatus for performing weather resistance tests according to claim 2, wherein said means for washing comprises spray nozzles disposed to spray said cleaner upon said sample surface.
Claim 5
Dependent Claim
26 words
An apparatus for performing weather resistance tests according to claim 2, wherein said means for holding said sample is inclined with respect to a horizontal plane.
Claim 6
Dependent Claim
28 words
An apparatus for performing weather resistance tests according to claim 4, wherein said means for washing comprises spray nozzles disposed to spray said cleaner upon said sample surface.
Claim 7
Dependent Claim
26 words
An apparatus for performing weather resistance tests according to claim 1, wherein said means for holding said sample is inclined with respect to a horizontal plane.
Claim 8
Dependent Claim
28 words
An apparatus for performing weather resistance tests according to claim 6, wherein said means for washing comprises spray nozzles disposed to spray said cleaner upon said sample surface.
Claim 9
Dependent Claim
28 words
An apparatus for performing weather resistance tests according to claim 1, wherein said means for washing comprises spray nozzles disposed to spray said cleaner upon said sample surface.
Claim 10
Independent Claim
108 words
A method for performing a weather resistance test on a sample surface comprising the steps of: (a) exposing said sample surface to ultraviolet light radiation for a first period of time, after which said radiation exposure is terminated; (b) subjecting said sample to a process for condensing moisture on said surface for a second period of time, after which said condensing process is concluded; and (c) repeating alternately said ultraviolet light radiation exposure and said moisture condensing steps; wherein said method includes the further steps of (d) at least between said ultraviolet light radiation exposure step and said moisture condensing step, washing said surface to remove contaminants therefrom.
Claim 11
Independent Claim
108 words
A method for performing a weather resistance test on a sample surface comprising the steps of: (a) exposing said sample surface to ultraviolet light radiation for a first period of time, after which said radiation exposure is terminated; (b) subjecting said sample to a process for condensing moisture on said surface for a second period of time, after which said condensing process is concluded; and (c) repeating alternately said ultraviolet light radiation exposure and said moisture condensing steps; wherein said method includes the further steps of (d) at least between said ultraviolet light radiation exposure step and said moisture condensing step, washing said surface to remove contaminants therefrom.
Claim 12
Dependent Claim
24 words
The method of claim 9, wherein said washing step is performed by spraying a cleaning solution from a spray nozzle onto said sample surface.
Claim 13
Dependent Claim
28 words
The method of claim 9, wherein said washing step is performed at the conclusion of said moisture condensing step before repetition of said ultraviolet light radiation exposure step.
Claim 14
Dependent Claim
24 words
The method of claim 11, wherein said washing step is performed by spraying a cleaning solution from a spray nozzle onto said sample surface.
Claim 15
Independent Claim
17 words
The method of claims 11, wherein said washing step is also performed during said moisture condensing step.
Claim 16
Dependent Claim
24 words
The method of claim 13, wherein said washing step is performed by spraying a cleaning solution from a spray nozzle onto said sample surface.
Claim 17
Dependent Claim
27 words
The method of claim 11, wherein said washing step is also performed after termination of said ultraviolet light radiation exposure step before beginning said moisture condensing step.
Claim 18
Dependent Claim
24 words
The method of claim 15, wherein said washing step is performed by spraying a cleaning solution from a spray nozzle onto said sample surface.
Claim 19
Dependent Claim
17 words
The method of claim 15, wherein said washing step is also performed during said moisture condensing step.
Claim 20
Dependent Claim
24 words
The method of claim 17, wherein said washing step is performed by spraying a cleaning solution from a spray nozzle onto said sample surface.
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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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |