1. Feeder Uneven gob temperature arising from improper temperature condition of forehearth Gob improperly shaped - too long or too large in diameter Inconsistent setting of dropguide Cordy glass   1. Feeder Adjust forehearth temperature so gob does not curl Check shape of gob Check setting of drop guide Locate source of cords and correct if possible   2. Machine Setup and Operation Gob hanging up in delivery equipment Incorrect size delivery equipment, causing gob to slow down, or vary in loading Inadequate lubrication of delivery equipment Deterioration of delivery equipment surface Deflector not centralize - bad loading Trailing or lower end of trough too low - gob not using full curve of the deflector Lower end of trough too high Spray nozzle loose Incorrect funnel setting Uneven blank temperature Blank too hot Dirty blanks Dirty funnel   2. Machine Setup and Operation User good grade of spray oil Use correct size delivery equipment Make sure that spray nozzles are spraying correctly on deflectors Use clean deflectors, troughs and scoops Centralize deflectors of center of blank Raise end of trough by the trough adjusting screw Lower end of trough Tighten spray nozzles Check funnel setting is correct Apply cooling blank evenly Increase cooling to blank Change blank Change funnel   3. Mold Equipment Improper blank design Incorrect funnel diameter   3. Mold Equipment Check blank design Correct funnel diameter