1. Feeder Glass too hot   1. Feeder Adjust the temperature of the glass   2. Machine Setup and Operation Neck ring out of alignment over top of mold Neck ring arms not square Improper cushioning of transfer action Incorrect or insufficient cooling wind setting neck rings too hot Loss of tension in neck spring Improper timing relationship between transfer and mold closing   2. Machine Setup and Operation Realign neck ring arm using neck ring setting gauge Check invert mechanism with neck ring aligning fixture Improve cushioning of transfer action Correct cooling wind setting Reset neck ring opening Correct timing between transfer and mold close   3. Mold Equipment Ring dovetail is too small - Poor match between neck ring and blank mold Recess in blank is too large - Poor match between neck ring and blank mold Mold neck is too large Guide ring worn Blowhead out of alignment   3. Mold Equipment Check with the mold gauge Check dimensions against mold designs Replace the blow mold Change the neck ring Realign the blowhead correctly over the mold