Food packaging articles are manufactured by providing top and bottom sheets
of flexible material and securing selected areas of the sheets along sealing edges
to define a plurality of triangular-shaped pouches, with each pouch corresponding
to an individual food packaging article. The sealing edges preferably are secured
by fusion or adhesion welding. In an illustrative embodiment, the sealing edges
are secured by ultrasonic welding using a pair of weld heads that are positioned
to weld lines at different angles from one another.
