CPC Subgroup
B29C 61/06 Making preforms having internal stresses, e.g. plastic memory
Full Title
Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor (for surface shaping B29C59/18; for lining articles B29C63/38; for joining preformed parts B29C65/66 ) > Making preforms having internal stresses, e.g. plastic memory
3 direct subcodes
Child Classifications
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- B29C 61/08 by stretching tubes
- B29C 61/10 by bending plates or sheets