FIELD: packaging industry.
SUBSTANCE: invention relates to method of package and to unit for producing rigid package with hollow rib. End section of workpiece is bent around bearing housing on workpiece panel for producing hollow rib; locking tab to make end section end part, is attached to panel for stabilization of hollow rib, and support housing is removed from hollow rib, when end section is bent.
EFFECT: method provides very accurate hollow peripheral rib making on cover, namely with desired shape and without noticeable deformations; besides, method is very cheap and easy to implement, requires to use only similar standard packing assembly with addition of several fixed and moving parts.
11 cl, 24 dwg
