US3963918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification device for machine moulded products
Assignee: Platmanufaktur AB
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Filing: 1974-06-17
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Granted: 1976-06-15
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Expires: 1994-06-17
Abstract
Abstract Apparatus for identifying which of a plurality of moulds moulded a particular container includes such moulded containers with coded combinations of lens members in their bottom, the lens members being illuminated to focus light to an optical system terminating at a photosensitive device which emits pulses as the lens members are sequentially scanned.
Inventors
- 👤 Claes-Goran Jensen
- 👤 Lars Olof Hansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:27
CPC Classifications
B; B07; B07C; B07C5/00; B07C5/34; B07C5/3412; G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/90; G01N21/9045; G01N21/9072; B65; B65G; B65G2201/00; B65G2201/02; B65G2201/0235; B65G2201/0244
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
Apparatus for identifying which of a plurality of moulds moulded a particular light transparent container comprising containers formed by the moulds, each container having integrally moulded in a line along its bottom a coded combination of lens members for focussing light projected onto the inner surface of the bottom of the container to a focal plane opposite the outer surface of the bottom of the container, each of said coded combinations being associated with a different mould; light source means for projecting light onto said inner surface of the bottom of the container; light detector means including a short focus objective lens focused at said focal plane, a photo-sensitive transducer for generating signals whose amplitude is a function of received light, guiding means for guiding light from said short focus objective lens to said photo-sensitive transducer and means for emitting a pulse each time the generated signal exceeds a given amplitude; and moving means for causing a relative movement along said line between said lens members and said short focus objective lens.
Claim 2
Dependent Claim
172 words
Apparatus for identifying which of a plurality of moulds moulded a particular light transparent container comprising containers formed by the moulds, each container having integrally moulded in a line along its bottom a coded combination of lens members for focussing light projected onto the inner surface of the bottom of the container to a focal plane opposite the outer surface of the bottom of the container, each of said coded combinations being associated with a different mould; light source means for projecting light onto said inner surface of the bottom of the container; light detector means including a short focus objective lens focused at said focal plane, a photo-sensitive transducer for generating signals whose amplitude is a function of received light, guiding means for guiding light from said short focus objective lens to said photo-sensitive transducer and means for emitting a pulse each time the generated signal exceeds a given amplitude; and moving means for causing a relative movement along said line between said lens members and said short focus objective lens.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein said inner surface is uniformly illuminated.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 wherein said container remains stationary and said moving means moves said short focus objective lens.
Claim 5
Dependent Claim
38 words
The apparatus of claim 3 wherein said lens members are arrayed on a circle concentric with the axis of the container and said moving means moves said short focal length lens along a path colinear with said circle.
Claim 6
Dependent Claim
90 words
The apparatus of claim 1 wherein said lens members are moulded along a circle in the bottoms of the containers, wherein said light source means projects a beam of light to a particular point on the circle on the inner surface of the bottom of a container, wherein said light detector means includes a short focus objective lens focus at a point in said focal plane opposite the point of impingement of the beam of light and wherein said moving means includes means for rotating a container about its axis.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |