Typically case sealers have side mounted compression rollers to ensure that the box is tightly sealed, and the side belt drives ensures that the box stays completely square. For different sized cases or boxes, the case sealer can be adjusted via two manual crank handles.
Fully automatic case sealers fold the flaps of the box down automatically, and are usually hooked up to a conveyor system. Adding to a conveyor system is really one of the only ways to make it fully automatic, because otherwise you would need to hand load boxes into the device. Some automatic case sealers automatically adjust to different box dimensions.
Uniform Semi-Automatic case sealers are adjustable, operator fed and same sized style cases. Random Semi-Automatic Case Sealers are operator fed, automatically adjust to box size, and are perfect for manufacturers with different sized cases. Uniform Automatic Case Sealers are operator free machines, for same sized cases. They fold 4 flaps and tape both top and bottom. This is perfect for consistent production of same product. Random Automatic Case Sealers are also operator free and automatically adjust to box size. They are perfect for large volumes of various size boxes on one line.