CHARLES B PLUMMER
Chiropractic in Stow Creek Twp, NJ

3991608, Nov 16, 1976

Oct 26, 1970

5/083974

James T. McGuire - Bridgeton NJ
Charles R. Plummer - Bridgeton NJ
Peter P. Rudowsky - Bridgeton NJ

Owens-Illinois, Inc. - Toledo OH

G01N 308

73 94

The testing of glass containers for structural defects, principally in the side wall surfaces thereof, is provided wherein bottles are conveyed in succession at spaced-apart intervals through the testing device. The testing device takes the form of a wheel having a substantial thickness mounted to rotate about a vertical axis, with the periphery of the wheel extending over a portion of the width of the conveyor belt. A pressure plate having a vertical surface facing in the direction of the wheel and positioned and supported from the opposite side of the conveyor has a surface configuration closely paralleling that of the curvature of the wheel. The pressure plate and wheel are positioned relative to each other such that a container, in order to pass between the wheel and the pressure plate, is subjected to a lateral compressive force. Because of the contour of the wheel and length of the pressure plate, at least 180. degree. of the bottle circumference finds itself being compressed by the wheel during the precessing motion of the container through the testing device.