Method for identification of metal boxes or cans and an...

B - Operations – Transporting – 30 – B

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209/29, 100/4, 3

B30B 9/32 (2006.01) B03B 9/06 (2006.01) B07B 13/10 (2006.01) B07B 15/00 (2006.01) B07C 5/34 (2006.01) G07F 7/06 (2006.01)

Patent

CA 1203777

ABSTRACT A method and an apparatus for identification and separa- tion of boxes or cans is disclosed. The can is placed in a motor controlled cradle, and the cradle with the can is rotated in a first direction to a first position with a first, prefer- ably low step frequency, and then is rotated or influenced for rotation back in a second and opposite direction into a second or starting point position with a second, preferably high step frequency, the time of the return movement simultaneously being measured as a function of the moment of inertia caused by the can, and wherein the can as a function of the measurement of time and possibly of additional measurement of the can length and material type is thrown out of the cradle either because the cradle is rotated further in the second direction or because the cradle is rotated back in the first direction and past the first position. Before the can is placed in the cradle it may be scanned inductively and/or capacitively. Also, its length can be measured optically while it is in the cradle. When the can is thrown out in said second direction it is thrown into a can compacting device. The apparatus may be used e.g. in a can return deposit apparatus.

440084

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