摘要 |
Automatic flame-proof door having adjacent concertina-type leaves (1,2). It is actuated by means of a linear pneumatic jack (15), the traveller (17) of which carries at least one plate (20) which is pierced with a guide slot (21) which cooperates with a stud (23) fixed to the door, in order to initiate and control the concertina-type folding movement. <IMAGE> |