Cetec Industrie offers the FBL 4c bag closure system. The system closes bags using a side strip and resealing, designed for the following bag materials: single-fold paper, multi-fold, with or without PE lining, and woven polypropylene with or without PE lining. The top of the bag is fed between two moving belts with an electronic speed regulator, and the bag is sealed with 4-by-100-watt heating devices with temperature control and final pressed by 2-by-2 rollers. The maximum linear speed is 15 m/min., according to the company.