Fay, Sharpe, Beall, Fagan, Minnich & McKee
Thermal stencil master sheet and adhesive therefor
 A thermal stencil master sheet for stencil printing has a thermoplastic synthetic resin film which is perforatable with heat and a porous substrate, which is substantially unchanged by the heat. The film is bonded to the substrate with a urethane adhesive, preferably composed mainly of a specific urethane prepolymer obtained by reacting a polyether diol with a diisocyanate so as to give an equivalent ratio of NCO/OH of at least 1.1. 
Riso Kagaku Corporation
Y Y B Y
Y10T Y10T B41N Y10T
additional additional inventional additional
Nobuyuki Hiromiti Yukio Mitsuyoshi Mitsutsugu Kenichi Masaki
Sato Yamada Okada Yukawa Masuda Sukegawa Bando