Lock Door and Window Locks

Lock is the important element of door accessories. Besides the function of cutoff from the undesirable opening, in the doors, prepared from the plastic profiles, the lock fulfills still this important function as pressing fold in order to ensure the normal operation of sealer and to avoid slipping of surrounding air in the places of the contact of frame and fold. Especially this is urgent on the entrance doors, and therefore locks must be divided into two classes: locks for the input and for the internal doors. The first class includes all multi-locking locks; the second class includes one way locks, although to if necessary ensure the higher degree of protection, on the internal doors can be established the multi-locking locks. From the practice, sometimes entrance doors are made with the one way lock; however, in this case it is necessary to foresee slipping of surrounding air in the upper and lower angles of fold.