Vacuum frame for copying film material onto printing plates comprises baseplate with applied elastic, airtight locating and sealed transparent glass plate

摘要

The glass plate (3) encloses a vacuum chamber (4) with the locating mat (2), for the evacuation of which a suction connection (5) connectable to a vacuum pump (P) issues into the vacuum chamber. On the elastic locating mat a pressure layer (7) is fitted, which is centrally connected with the suction connection penetrating the baseplate (1) and the locating mat.