Falling film still having convex film feeding spillways

Claim 1

IN A SYSTEM OF THE CLASS DESCRIBED, A HOUSING, VAPOR DIFFUSION MEANS IN SAID HOUSING INCLUDING OPPOSED FILM PLATES FORMING A VERTICAL CHANNEL THEREBETWEEN, GENTLY CURVED CONVEX SURFACES DEFINING SPILLWAYS AT THE UPPER END THEREOF MERGING FLUSH WITH HE PLATES, MEANS SUPPLYING LIQUID TO BE VAPORIZED TO SAID HOUSING TO A LEVEL RELATIVELY TO SAID SPILLWAYS FOR DELIVERY THEREALONG AND TO SAID PLATES IN THIN FILM DISPOSITION, MEANS AT THE LOWER END OF SAID CHANNEL MERGING FLUSH WITH SAID PLATES AND DIVERGING RELATIVELY TO ONE ANOTHER TO LEAD THE FILMS ON SAID PLATES TO COLLECTIONS MEANS OFFSET FROM SAID CHANNEL, VAPOR COLLECTION MEANS POSITIONED BELOW SAID CHANNEL AND BETWEEN SAID FILM COLLECTION MEANS, CONDENSER MEANS, AND MEANS CONDUCTING THE VAPOR FROM SAID COLLECTION MEANS TO SAID CONDENSER.