Apparatus for carrying out a diffusion transfer process

Claim 1

A DEVICE FOR CARRYING OUT THE DIFFUSION TRANSFER COPY PROCESS FROM AN EXPOSED NEGATIVE SHEET TO A RECEIVING SHEET IN THE PRODUCTION OF COPY COMPRISING A TANK FOR CONTAINING DEVELOPING LIQUID, A PAIR OF COOPERATING PRESS ROLLS ARRANGED ABOVE THE LEVEL OF LIQUID IN THE TANK IN AN INTERMEDIATE PORTION THEREOF, A PAIR OF APPLICATOR ROLLS, ONE OF WHICH IS ARRANGED WITH A PART OF ITS PERIPHERAL SURFACE IN CONTACT WITH A PART OF ITS PERIPHERAL ANOTHER PART OF ITS PERIPHERAL SURFACE ADJACENT THE PERIPHERAL SURFACE OF ONE OF THE PRESS ROLLS OF THE PAIR ABOVE THE LIQUID LEVEL WITH THE OTHER APPLICATOR ROLL HAVING A PART OF ITS PERIPHERAL SURFACE ADJACENT THE PERIPHERAL SURFACE OF THE OTHER PRESS ROLL OF THE PAIR ABOVE THE LIQUID LEVEL, MEANS FOR GUIDING ONE OF THE SHEETS BETWEEN THE ONE APPLICATOR ROLL AND THE ONE PRESS ROLL OF THE PAIR WHEREBY ITS OUTER SURFACE IS IN CONTACT WITH THE PERIPHERAL SURFACE OF THE APPLICATOR ROLL FOR WETTING THE SHEET WITH THE DEVELOPING LIQUID AND MEANS FOR FEEDING THE OTHER SHEET BETWEEN THE OTHER APPLICATOR ROLL AND THE OTHER PRESS ROLL OF THE PAIR, AND MEANS ABOVE THE LIQUID LEVEL FOR GUIDING THE SEPARATE SHEETS FROM BEYOND THE APPLICATOR ROLLS TO THE COOPERATING PRESS ROLLS WHEREBY THE WETTED SURFACE OF THE ONE SHEET IS PRESSED INTO ENGAGEMENT WITH THE OUTER SURFACE OF THE OTHER SHEET FOR PASSAGE OF THE SHEETS THROUGH THE DEVICE WITHOUT PASSING BELOW THE LIQUID LEVEL.

Claim 2

A DEVICE FOR CARRYING OUT THE DIFFUSION TRANSFER COPY PROCESS FROM AN EXPOSED NEGATIVE SHEET TO A RECEIVING SHEET IN THE PRODUCTION OF COPY COMPRISING A TANK FOR CONTAINING DEVELOPING LIQUID, A PAIR OF COOPERATING PRESS ROLLS ARRANGED ABOVE THE LEVEL OF LIQUID IN THE TANK IN AN INTERMEDIATE PORTION THEREOF, A PAIR OF APPLICATOR ROLLS, ONE OF WHICH IS ARRANGED WITH A PART OF ITS PERIPHERAL SURFACE IN CONTACT WITH A PART OF ITS PERIPHERAL ANOTHER PART OF ITS PERIPHERAL SURFACE ADJACENT THE PERIPHERAL SURFACE OF ONE OF THE PRESS ROLLS OF THE PAIR ABOVE THE LIQUID LEVEL WITH THE OTHER APPLICATOR ROLL HAVING A PART OF ITS PERIPHERAL SURFACE ADJACENT THE PERIPHERAL SURFACE OF THE OTHER PRESS ROLL OF THE PAIR ABOVE THE LIQUID LEVEL, MEANS FOR GUIDING ONE OF THE SHEETS BETWEEN THE ONE APPLICATOR ROLL AND THE ONE PRESS ROLL OF THE PAIR WHEREBY ITS OUTER SURFACE IS IN CONTACT WITH THE PERIPHERAL SURFACE OF THE APPLICATOR ROLL FOR WETTING THE SHEET WITH THE DEVELOPING LIQUID AND MEANS FOR FEEDING THE OTHER SHEET BETWEEN THE OTHER APPLICATOR ROLL AND THE OTHER PRESS ROLL OF THE PAIR, AND MEANS ABOVE THE LIQUID LEVEL FOR GUIDING THE SEPARATE SHEETS FROM BEYOND THE APPLICATOR ROLLS TO THE COOPERATING PRESS ROLLS WHEREBY THE WETTED SURFACE OF THE ONE SHEET IS PRESSED INTO ENGAGEMENT WITH THE OUTER SURFACE OF THE OTHER SHEET FOR PASSAGE OF THE SHEETS THROUGH THE DEVICE WITHOUT PASSING BELOW THE LIQUID LEVEL.