Device for the fixing of the tool of a platen press against the upper bed

Claim 1

APPARATUS FOR SUPPORTING A TOOL BENEATH THE UPPER PLATEN OF A PRESS WHICH HAS A SMOOTH FLAT UNDERSURFACE, SAID APPARATUS COMPRISING A FRAME, MEANS SECURED TO SAID UPPER PLATEN FOR SUPPORTING SAID FRAME THEREBENEATH SUCH THAT SAID FRAME CAN BE SLIDABLY INTRODUCED AND WITHDRAWN FROM BENEATH THE PLATEN, A TOOL PERIPHERALLY SUPPORTED BY SAID FRAME AND INCLUDING A SHEET CONTAINED WITHIN THE FRAME DEFINING A SPACE WITH THE UNDERSURFACE OF THE PLATEN, A RIGID PLATE IN SAID SPACE DETACHABLY SUPPORTED BY SAID PLATEN, SAID PLATE HAVING A SURFACE IN CONTACT WITH SAID UNDERSURFACE OF THE PLATEN, SAID PLATE BEING PROVIDED IN THE AFOREMENTIONED SURFACE THEREOF WITH A PLURALITY OF PARALLEL TRANSVERSE GROOVES HAVING OPPOSITE ENDS, SAID PLATE BEING FURTHER PROVIDED IN SAID SURFACE WITH A LONGITUDINAL GROOVE IN COMMUNICATION WITH SAID TRANSVERSE GROOVES AT ONE OF THE ENDS THEREOF, WHEREBY A NETWORK OF GROOVES IS ESTABLISHED IN SAID SURFACE OF THE PLATE WHICH IS COVERED BY THE UNDERSURFACE OF THE PLATEN, AND CONDUIT MEANS CONNECTED TO THE PLATE AND IN COMMUNICATION WITH THE NETWORK OF GROOVES FOR ESTABLISHING SUCTION THEREIN, SAID PLATE BEING PROVIDED WITH SPACED HOLES REGULARLY ARRANGED ALONG THE TRANSVERSE GROOVES AND OPENING INTO SAID GROOVES FOR THEREBY HAVING SUCTION DEVELOPED THEREIN, SAID SHEET OF THE TOOL HAVING AN UPPER SURFACE PROXIMATE THE HOLES IN THE PLATE SUCH THAT THE UPPER SURFACE OF THE SHEET IS DRAWN AGAINST THE PLATE AND IS HELD THEREAGAINST BY THE SAID SUCTION.