WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING (operations of the kind involved in the manufacture of such products B 21 B, B 21 C; working or processing of wire B 21 F; cutting or severing devices or machines in general B 26; presses in general B 30 B)
Notes
(1)
This subclass covers cutting or perforating of sheet metal or other stock material.
(2)
This subclass does not cover the working of metal foils in a manner analogous to the working of paper, which is covered by classes B 26, B 31.
Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom (B 21 D 3/00 takes precedence); Stretching sheet metal combined with rolling (working sheet metal of limited length by stretching B 21 D 25/00; by localised hammering B 21 D 31/06) [2]
of hollow bodies made from sheet metal (of substantially open bodies B 21 D 1/10)
1
/
10
•
•
of specific articles made from sheet metal, e.g. mudguards
1
/
12
•
Straightening vehicle body parts or bodies (B 21 D 1/14 takes precedence)
1
/
14
•
Straightening frame structures
3
/
00
Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts (straightening of well casings in situ E 21 B)
3
/
02
•
by rollers
3
/
04
•
•
arranged on axes skew to the path of the work
3
/
05
•
•
arranged on axes rectangular to the path of the work [2]
3
/
06
•
•
arranged inclined to a revolving flier rolling frame
3
/
08
•
•
which move in an orbit without rotating round the work
3
/
10
•
between rams and anvils or abutments
3
/
12
•
by stretching with or without twisting (by twisting only
B 21 D 11/14)
3
/
14
•
Recontouring
3
/
16
•
of specific articles made from metal rods, tubes, or profiles, e.g. crankshafts, by specially-adapted methods or means
