There are many types of these machines that you can go for. Here are some of the most common:

 

Pouch laminator

 

This is a unit that heats the laminate and seals both sides. The unique feature of this unit is that the laminate isn't attached to the machine. To laminate your document you need to place the document that you want to laminate inside the laminate pouch and turn the machine on in order to heat up.

 

Once ready, place the pouch in the machine and the machine rollers will pull the pouch through the heat. The two layers of the laminate consist of polyester-based layer and adhesive resin. When the two touch and are heated, the resin melts creating a hard surface and bonds with the polyester layer.

 

Large laminator

 

There are two types of this unit: large film and pouch type. The pouch type is explained above. The large film laminator is designed to laminate big items or many items at the same time. To use the machine you need to turn it on and place the items that you want to laminate at the bottom sheet of clear laminate.