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US3661258A
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Ultraviolet light label monitoring system
Assignee: Wyeth Holdings LLC
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Filing: 1970-03-12
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Granted: 1972-05-09
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Expires: 1990-03-12
Abstract
Abstract A three-stage ultraviolet light label detection unit is provided for monitoring articles to detect and separate articles having luminescent, i.e., fluorescent or phosphorescent, imprints located thereon. The first detection stage uses ultraviolet light to sense the presence of luminescent imprints; the second control stage uses white light sensing to control the movement of articles passing thereby; the third reset stage also uses white light sensing to reset the control stage. Each stage acts through a logic circuit adapted to provide the desired detection and separation of luminescent from non-luminescent articles.
Inventors
- 👤 Michael Madalo
- 👤 William H Marlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:19
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/3412
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
Apparatus for sorting articles in accordance with the presence or absence of luminescent material thereon, said apparatus including a detection stage, a control stage, and a reset stage, a detector in each said stage, said detection stage detector being adapted to detect radiations from activated luminescent material, a logic circuit interconnecting said detectors to receive information therefrom, a conveyor to carry said articles sequentially through said stages, a rejector in said cOntrol stage controlled by said logic circuit, said logic circuit activating and deactivating said rejector in accordance with whether or not said detection stage detector finds luminescent material present on said articles as they pass through said detection stage.
Claim 2
Dependent Claim
110 words
Apparatus for sorting articles in accordance with the presence or absence of luminescent material thereon, said apparatus including a detection stage, a control stage, and a reset stage, a detector in each said stage, said detection stage detector being adapted to detect radiations from activated luminescent material, a logic circuit interconnecting said detectors to receive information therefrom, a conveyor to carry said articles sequentially through said stages, a rejector in said cOntrol stage controlled by said logic circuit, said logic circuit activating and deactivating said rejector in accordance with whether or not said detection stage detector finds luminescent material present on said articles as they pass through said detection stage.
Claim 3
Dependent Claim
49 words
Apparatus as set forth in claim 1, in which said logic circuit is adapted to actuate said rejector each time one of said articles passes through said control stage unless said detection stage detector has found luminescent material present on said article when it passed through said detection stage.
Claim 4
Dependent Claim
34 words
Apparatus as set forth in claim 2, in which said logic circuit is reset to cause said rejector to thereafter reject each time one of said articles is detected by said reset stage detector.
Claim 5
Dependent Claim
126 words
Apparatus for sorting articles including a detection stage including a detector therein sensitive to radiations from activated luminescent material, a following control stage including a visible light detector and a rejector therein, and a following reset stage including a visible light detector, said detectors and said rejector being interconnected through a logic circuit, said logic circuit being programmed to actuate said rejector to reject each said article as it passes through said control stage and is detected by said control stage detector unless said detection stage detector has found luminescent material on said article, said reset stage detector resetting said logic circuit to again cause rejection of articles as soon as a non-rejected article leaves said control stage and is detected by said reset stage detector.
Claim 6
Dependent Claim
126 words
Apparatus for sorting articles including a detection stage including a detector therein sensitive to radiations from activated luminescent material, a following control stage including a visible light detector and a rejector therein, and a following reset stage including a visible light detector, said detectors and said rejector being interconnected through a logic circuit, said logic circuit being programmed to actuate said rejector to reject each said article as it passes through said control stage and is detected by said control stage detector unless said detection stage detector has found luminescent material on said article, said reset stage detector resetting said logic circuit to again cause rejection of articles as soon as a non-rejected article leaves said control stage and is detected by said reset stage detector.
Claim 7
Dependent Claim
52 words
Apparatus for sorting articles as set forth in claim 4, in which said logic circuit controls said rejector by deactivating same each time said detection stage detector finds the presence of said luminescent material and by reactivating same every time said reset stage detector detects the presence of one of said articles.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |