sona-tronic company 1967 sona-tector stone detector food vintage ad

Original 1967 potato chip trade magazine vintage ad for the SONA-TRONIC COMPANY, INC. Main office and factory was located at 180 Central Street, Leominster, MA. When the chips are down, leaves no stone unturned, or undetected. The Stone Detector is a new, low cost, simple-to-install method devised to eliminate damage to knives, holders, bucket elevators and end expensive down time. The Sona-Tector Stone Detector units find stones, glass, steel and other foreign objects by electronically picking up abnormal sounds and instantly stopping the motor. An alarm is immediately given. Model 135. This old dated one page snack food equipment manufacturing magazine advertisement would display beautifully matted and framed.