Re: glass cullet in hoppers, out of era.

James Eckman

One reason that bottle plants generate cullet is that if a SINGLE bottle is found with a defect called a bird's swing, the entire batch of bottles is rejected and smashed on the spot, even if there are 1,000s in that batch. When the bottles are filled, this defect leaves tiny shards of glass in the bottle. Very nasty to say the least. Also hangups in the line can quickly destroy 100 or more bottles in a very short period of time. These happen fairly often. The technology hasn't changed much since the 40's from what I understand except for inspection and threaded caps.

Jim Eckman
Former designer of bottle inspection equipment

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