US 425460, Vogel, Walter H. & Close, Thomas E., "Cartoner and product infeed conveyor therefor", published 1981-03-10, assigned to Redington Inc.
US 5787680, Tisma, Stevan & Zabran, Steven, "Horizontal cartoner with vertically articulating product trays for multiple counts/layers of wrapped products", published 1998-08-04, assigned to Tisma Machinery Corp.
US 4802324, Everson, William G., "Vertical cartoning assembly and method", published 1989-02-07, assigned to Minnesota Automation Inc.