Double-coated pressure-sensitive adhesive tape

Claim 1

A LINERLESS TRANSPARENT DOUBLE-COATED PRESSURESENSITIVE ADHESIVE TAPE WOUND DIRECTLY UPON ITSELF IN ROLL FORM, COMPRISING A TRANSPARENT FLEXIBLE FILM SUPPORT COATED ON EACH OF THE FRONT AND BACK SIDES WITH RESPECTIVELY DIFFERENT TRANSPARENT RUBBERY-BASE PRESSURE-SENSITIVE ADHESIVES EACH OF WHICH IS AGGRESSIVELY TACKY IN ITS NORMAL DRY FORM SO AS TO READILY AND TENACIOUSLY ADHERE UPON CONTACT WITH DISSIMILAR SURFACES SUCH AS GLASS, METAL, WOOD AND PAPER AND SO AS TO ENABLE USE OF THE TAPE AS A SUBSTITUTE FOR GLUE IN FASTENING PAPERS TOGETHER AND MOUNTING PHOTOGRAPHS AND CLIPPINGS IN ALBUMS, THE ADHESIVE COATINGS QDHERING TO EACH OTHER IN THE WOUND ROLL SO THAT SUBSTANTIAL FORCE IS NEEDED IN UNWINDING TAPE THEREFROM; THE TAPE HAVING A THICKNESS NOT EXCEEDING 4 MILS; THE RESPECTIVE RUBBERY-BASE PRESSURE-SENSITIVE ADHESIVES BEING SELECTED SO AS TO BE CHEMICALLY DIFFERENT AND PHYSICALLY INCOMPATIBLE SUCH THAT THEY WILL SEPARATE AT THE INTERFACE THEREBETWEEN AND THE ADHESIVE TAPE CAN BE READILY UNWOUND FROM THE ROLL WITHOUT DELAMINATION OR OFFSETTING OF ADHESIVE.