Identification device for machine moulded products
AssigneeAktiebolaget Platmanufaktur
InventorsClaes-Goran Jensen, Lars Olof Hansson
Life of this patent
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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.
Claims5
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.
Dependencies are inferred from the claim text.