Sealing bars in packaging machines are high performance mechanisms that often require precisely located heat. Dalton Electric Heating Co. has successfully addressed a myriad of package sealing applications over the years, due to a number of benefits of our Watt-Flex® cartridge heaters.

Packaging machines require precisely located heat

Conventional heaters are manufactured with a varying number of resistance cores, depending on the length of the heater. They are wired in parallel and can burn out independently, causing a cold spot on the sealing bar and rendering the bar incapable of a consistent seal. The Watt-Flex heater has one continuous coil, no matter what the length. This will insure an even temperature profile across the sealing surface.

Watt-Flex® heaters ensure even heating across the sealing surface

Packaging machines generally utilize smaller diameter heaters that extend some considerable length through the sealing bar. Over time a conventional heater will seize up in the bar due to warping, uneven heating and contamination. The small diameter heater is very difficult to remove without damaging the bar and, if drilling out is required, the likelihood of ruining the bore is high. The Watt-Flex cartridge is warranted to be removable and will not cause damage to the bore.

Keep an eye out for packaging applications and seal up another success!