This unique patented sealer applies a kraft paper patch over the valve corner of filled bags. The seal is not considered hermetic, but is extremely effective at preventing product spillage from the valve. The resultant seal meets HACCP food grade requirements, and serves as a form of tamper evidence. The solution is high-speed, with the standard model capable of 1000bags/hour, and dual-head models 1500bags/hour. Seal adhesion is far superior to adhesive patches or industrial tapes, and highly resistant to any product or dirt on the outside of the bag. The sealer is supplied complete on a belt conveyor with the required bag conditioners, and is easily integrated into any existing line.