US3609044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for selectively inspecting a web surface and a coating on the surface
Assignee: Eastman Kodak Co
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Filing: 1969-07-01
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Granted: 1971-09-28
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Expires: 1989-07-01
Abstract
Abstract An apparatus for inspecting a specular surface and a coating on said surface. A reference pattern is so positioned with respect to the surface that a reflection of the pattern appears on the surface. A diffusion plate is located between the reference pattern and the surface and is movable between a first position wherein the reflection of the pattern on the surface has a high contrast for inspecting the surface to a second position wherein the reflection of the pattern on the surface is diffused for inspecting the coating.
Inventors
- 👤 Thomas J Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:24
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
An apparatus for use with a light source for inspecting a specular surface and a coating on such surface, said apparatus comprising: pattern means including a light transmissive sheet supporting an opaque reference pattern to be positioned between the light source and said surface so that the reference pattern appears as a reflected image from said surface; and diffusion means mounted for movement relative to said pattern means between, a first position adjacent to said pattern means for transmitting said reference pattern so that the reflected image of said reference pattern from said surface is a perceptable high contrast image, and a second position remote from said pattern means for diffusing said reference patterns so that the reflected image from said surface is obliterated and diffused.
Claim 2
Independent Claim
126 words
An apparatus for use with a light source for inspecting a specular surface and a coating on such surface, said apparatus comprising: pattern means including a light transmissive sheet supporting an opaque reference pattern to be positioned between the light source and said surface so that the reference pattern appears as a reflected image from said surface; and diffusion means mounted for movement relative to said pattern means between, a first position adjacent to said pattern means for transmitting said reference pattern so that the reflected image of said reference pattern from said surface is a perceptable high contrast image, and a second position remote from said pattern means for diffusing said reference patterns so that the reflected image from said surface is obliterated and diffused.
Claim 3
Independent Claim
130 words
An apparatus for inspecting a web having a specular surface and a coating on such surface and movable through a predetermined path comprising: a source of visible light; a visible light transmissive sheet having a reference pattern thereon and positioned between said light source and said wEb in said path so that said reference pattern appears as a reflected image on said web surface; and diffusion means mounted between said sheet and said web for movement between a first position wherein said diffusion means is so positioned relative to said pattern that the reflected image of said reference pattern is a high contrast image to a second position wherein said diffusion means is so positioned relative to said pattern means that the reflected image of said reference pattern is diffused.
Claim 4
Independent Claim
130 words
An apparatus for inspecting a web having a specular surface and a coating on such surface and movable through a predetermined path comprising: a source of visible light; a visible light transmissive sheet having a reference pattern thereon and positioned between said light source and said wEb in said path so that said reference pattern appears as a reflected image on said web surface; and diffusion means mounted between said sheet and said web for movement between a first position wherein said diffusion means is so positioned relative to said pattern that the reflected image of said reference pattern is a high contrast image to a second position wherein said diffusion means is so positioned relative to said pattern means that the reflected image of said reference pattern is diffused.
Claim 5
Dependent Claim
15 words
The invention according to claim 2 wherein said sheet and said diffusion means are planar.
Claim 6
Dependent Claim
20 words
The invention according to claim 3 wherein said reference pattern comprises a plurality of parallel stripes oriented bias the web.
Claim 7
Dependent Claim
27 words
The invention according to claim 4 further comprising: a black body having a uniform nonreflective surface positioned on the side of said web opposite said specular surface.
Claim 8
Dependent Claim
14 words
The invention according to claim 2 wherein said diffusion means is a translucent sheet.
Claim 9
Dependent Claim
45 words
The invention according to claim 1 wherein the apparatus further comprises: a housing for said light source and wherein said pattern means forms a wall of said housing and, said diffusion means is pivotally mounted from said housing adjacent an edge of said pattern means.
Claim 10
Dependent Claim
49 words
The invention according to claim 2 wherein the apparatus further comprises: a housing for said source of visible light and wherein said sheet forms a wall of said housing and said diffusion means is a translucent sheet pivotally mounted from said housing adjacent an edge of said pattern means.
Claim 11
Dependent Claim
17 words
The invention according to claim 1 wherein said reference pattern is positioned oblique to the specular surface.
Claim 12
Dependent Claim
17 words
The invention according to claim 2 wherein said reference pattern is positioned oblique to the specular surface.
References Cited (Backward Citations)
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Cited
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |