2. Technique Form, fill and seal

The words form, fill and seal are used to designate the technique for packaging products in sealed plastic bags shown in figure 9 . It consists of :

• form a container by "sleeving" a continuous sheet, usually plastic, sometimes coated paper to make it heat-sealable;

• fill the sleeve from the top, after heat-sealing it lengthwise;

• Weigh the quantity required for each bag;

• and, finally, seal each bag laterally.

This technique, which allows high speeds (up to 150 pouches per minute, or even more with small pouches), is particularly well-suited to packaging powders of all types, provided they...