PTR Baler & Compactor is proud to service Chicago and the surrounding area. Our clients in Illinois depend on us for sales and service of vertical balers, stationary compactors, self contained compactors, cart dumpers and rebuilt PTR balers. The City of Chicago, located in Illinois, is the third most populous city in the United States with a population of over 2.7 million people. This makes it the most populated city in both the state of Illinois and the Midwestern region of the country. Chicago is considered the birthplace of the skyscraper and one of the most important architectural cities of the 1900s.