using external forming surfaces, e.g. sleeves

Full Title

Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor > Bending and joining, e.g. for making hollow articles > by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges > for articles of indefinite length, i.e. bending a strip progressively > using external forming surfaces, e.g. sleeves

Classification Context

Section:

PERFORMING OPERATIONS; TRANSPORTING

Class:

WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL

Subclass:

SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING