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2. Check weigher - Wikipedia

   en.wikipedia.org/wiki/Check_weigher

   Checkweighers can be built with metal detectors, x-ray machines, open-flap detection, bar-code scanners, holographic scanners, temperature sensors, vision inspectors, timing screws to set the timing and spacing between product, indexing gates and concentrator ducts to line up the product into a designated area on the conveyor.

3. Metal detector - Wikipedia

   en.wikipedia.org/wiki/Metal_detector

   A metal detector is an instrument that detects ... to detect foreign bodies in food, ... for all subsequent metal detectors. Initially these machines were huge and ...

4. Multihead weigher - Wikipedia

   en.wikipedia.org/wiki/Multihead_weigher

   The multihead weigher was invented and developed by Ishida in the 1970s and launched into the food industry across the world. [2] [3] [4] [5]Today this kind of machine, thanks to its high speed and accuracy, has achieved widespread adoption in the packaging industry and is produced worldwide by a number of manufacturers.

5. Rapiscan Systems - Wikipedia

   en.wikipedia.org/wiki/Rapiscan_Systems

   Rapiscan Metor walk-through metal detectors stem originally from Outokumpu, which was one of the first companies to develop walk-through metal detectors for security screening. The systems were originally adapted from metal detectors used in the mining industry to locate parts of broken drill bits in minerals on a conveyor belt. [5]

6. Millimeter wave scanner - Wikipedia

   en.wikipedia.org/wiki/Millimeter_wave_scanner

   These machines have also been deployed in the Jersey City PATH train system. [37] They have also been deployed at San Francisco International airport ( SFO ), as well as Salt Lake International Airport ( SLC ), Indianapolis International Airport ( IND ), Detroit-Wayne County Metropolitan Airport ( DTW ), Minneapolis-St. Paul International ...

7. Gerhard Fischer (inventor) - Wikipedia

   en.wikipedia.org/wiki/Gerhard_Fischer_(inventor)

   Although the actual inventor of the hand-held metal detector is disputed, the hand-held metal detector was made in 1925 and was first patented by Dr. Gerhard Fisher in 1931. A metal detector had been invented some forty years earlier (1881) by Alexander Graham Bell for the sole purpose of locating a lead bullet in President James A. Garfield.