1. Feeder Cold glass Gob too pointed   1. Feeder Adjust gob temperature Correct the gob shape-remove the point   2. Machine Setup and Operation Neck ring holder too loose or too tight or not set at the proper height. If too tight, they may close on the neck ring past the center of the blank pulling out glass. If too loose, they may shake the neck ring causing pull out of glass. Not very common Blank opens too fast Plunger mechanism incorrectly set; too high or too low Baffle coming off late Thimble down and blank open   2. Machine Setup and Operation Check with neck ring setting gauge Slow down blank opening action Check setting of plunger mechanism relative to neck ring and blank   3. Mold Equipment Poor blank and neck ring match   3. Mold Equipment Check against mold gauges