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US 3,942,001 AGranted
Inspection of containers
AssigneeTalcoma Teoranta
InventorBartholomew John O'Connor
Life of this patent
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AssigneeTalcoma Teoranta
InventorBartholomew John O'Connor
Estimating the term…
Apparatus for detecting the presence of extraneous matter and/or cracks in translucent containers and in particular translucent containers when the colour density and/or wall thickness of the translucent containers vary significantly from container to container which includes a vertical spot beam of light which is projected through the container to generate an electrical inspection signal corresponding to the amount of light passing through the container. This electrical inspection signal is compared with a predetermined electrical acceptance signal, which is a function of the vertical position of the spot beam of light relative to the container. There is an ambient light correction and for colored containers either the inspection signal or the acceptance signal is altered during the inspection process to take account of the colored density and/or wall thickness.
Apparatus for detecting the presence of extraneous matter and/or cracks in translucent containers, said apparatus comprising:
Apparatus for detecting the presence of extraneous matter and/or cracks in translucent containers when the color density and/or wall thickness of the translucent containers vary significantly from container to container, said apparatus comprising;
A method for detecting the presence of extraneous matter and/or cracks in translucent containers said method including the steps of:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Investigating the presence of flaws or contamination: in a container or its contents
In a container or its contents: dirt detection in containers
Testing material properties on manufactured objects: containers; Packages; Bottles
Investigating or analysing materials by determining their chemical or physical properties
Term ended 2 Mar 1993 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to a method and apparatus designed for inspecting translucent containers for the presence of extraneous matter and/or cracks. The invention is particularly suitable for use with translucent containers when the colored density and/or wall thickness of the translucent containers vary significantly from container to container.
2. Description of the Prior Art
FIG. 1 is a side, partially cross-sectional, elevation of the apparatus according to the invention,
FIG. 2 is a cross-sectional view along the lines II--II of FIG. 1,
FIG. 3 is a side elevation of portion of the apparatus,
Referring to the drawings, and initially to FIGS. 1 to 4 thereof, the apparatus comprises a light projector 1 and an associated condenser 2 for producing a concentrated narrow slit or ribbon of light 3.
The ribbon of light 3 is projected onto a rotating drum 4 which tangentially supports twenty outwardly reflecting plane silvered mirrors 5, each of which is 1 inch in axial length and 3/4 of an inch in width. The drum 4 is fixedly mounted upon a shaft 6 carrying a pulley 7 driven by a belt 8 (see FIG. 3), coupled to the pulley 9 of an electric motor 10, the drum 4, electric motor 10, and associated mechanism being mounted within a casing 15 having an aperture 16 permitting entry of the ribbon of light 3 through the casing 15 to the mirror carrying drum 4.
As the ribbon of light 3 impinges upon each of the rotating mirrors 5, it is reflected downwardly through an aperture 17 in the floor of the casing 15 to three plane silvered mirrors 18, 19 and 20, thereby providing a repetitive scanning ribbon of light 3a.