CLARCOR Inc. was a manufacturer of filtration systems and packaging materials based in Franklin, Tennessee. founded in Rockford, Illinois as JL Clark Manufacturing Co. by John Lewis Clark in 1904. It had approximately 30 manufacturing and distribution sites in the United States.There were mainly two segments operating in the company: Engine/Mobile Filtration (providing air, fuel, transmission, and hydraulic fluid filters for engines, as well as dust collection cartridges), and Industrial/Environmental Filtration (providing filters for industrial process, pharmaceutical processes).