Bottle inspection apparatus

摘要

847,694. Bottle inspection apparatus. FENN, G. C., and TROPE, J. R. Feb. 6, 1958 [March 1, 1957], No. 3876/58. Class 40(3). In a transparent or translucent container inspection apparatus in which two photo-electric cells, positioned on one side of a belt conveying the containers to be inspected, receive visible and infra red light via the containers from two light sources positioned on the other side of the belt, a reject mechanism is operated when light from one source is intercepted by foreign matter in a container moving between the light sources and the cells. The arrangement is shown in plan in Fig. 2, the lamp 1 and lamp 2 below it (not shown) direct two beams of light across the belt B conveying the bottles A to the photoelectric cells 4, 5 (not shown). The cells are connected in opposition in the circuit shown in Fig. 1, 41 is a resistor common to both cell circuits and when the cells are equally illuminated no voltage appears across this resistor. When however cell 5 is obscured by foreign matter in the lower part of the bottle being inspected, the negative voltage developed across resistor 41 reduces the current flow through valve 13, the resulting positive voltage produced in the anode circuit of this valve fires the valve 19 which is normally held in a cut-off condition. Relay 34 is energized operating the heavy duty relays 35, 37 which energize the reject mechanism. This comprises solenoid 36 which is energized to advance the sensing wheel 45 mounted on the shaft 46 across the path of the bottles to prevent succeeding bottles being advanced until the soiled bottle is rejected, when the wheel is fully advanced switch 40 is operated energizing solenoid 41 which lowers the fence 56 to enable the bottle to be ejected into the circular magazine 57 provided to receive soiled bottles. Simultaneously solenoid 44 advances the arm 73 across the conveyer belt to push the soiled bottle into the magazine, when the arm is fully extended co-operating cam 77 breaks the circuit of relay 37 thereby releasing solenoid 44. The momentum of the returning arm causes it to overtravel and open switch 39 which releases relay 35 returning the sensing wheel and fence to their normal positions.