Foldng cupboard door of steel plate especially, has reinforcement groove with deeper middle base part, side flanks of groove parallel with inner edge of door

摘要

The cupboard door (2) has at least one preferably deep-drawn reinforcement groove (9) on the front and extending the whole height of the door. The base (11) of the groove is curved and is deeper in the middle of the door towards shallower ends (6). Between the base surface of the groove and the door surface are side flanks (12,13) of the groove which extend parallel with the inner edge (7) of the door,.