Final blow/finish cooling valve function monitor

Apparatus for monitoring application of air to blow mold a container, having a body formed in a blow mold and a finish, through a dual-stage blowhead, a first solenoid valve for applying final blow air through the blowhead to a container in the mold and a second solenoid valve for applying finish cooling air through the blowhead around the finish of the container in the mold, each of said first and second solenoid valves being responsive to associated first and second electrical valve control signals for applying air through said blowhead, said apparatus comprising:

• means coupled to said first and second solenoid valves for detecting timing of application of said first and second electrical valve control signals to said valves,
• first and second air pressure sensors respectively operatively coupled to said first and second solenoid valves for generating associated first and second electrical sensor signals indicative of timing of application of air by said first and second solenoid valves to said blowhead, and
• means responsive to timing of said first and second valve control signals and said first and second sensor signals for indicating operating condition of said valves.