Abstract: An apparatus for detecting the thickness of a bank note has a plurality of detectors which slide along the surface of the bank note. The detectors are attached to a detection arm side by side. The detection arm is pivotably mounted an a machine frame. If one or more detectors slide on the bank note having a thickness exceeding a standard value, the arm is swung and the displacement of the arm is detected.

Abstract: There is provided a bill discriminating apparatus which utilizes the presence of a light-emitting substance in a printed zone of the bill when irradiated with ultraviolet rays. The bill discriminating apparatus comprises an ultraviolet ray-emitting member for irradiating a bill to be discriminated, a photoelectric converter element for receiving light rays emitted from a light-emitting substance in a printed zone of the bill when the light-emitting substance is irradiated with ultraviolet rays, and a discriminating circuit for checking pattern signals of the light-emitting substance, which signals are delivered by said converter element.

Abstract: A synthetic polyisoprene rubber latex produced by emulsifying a solution of polyisoprene rubber in an organic solvent with water and removing the solvent from the resulting oil-in-water emulsion is significantly improved with respect to mechanical stability, wet gel strength and dry film strength by utilizing, as a polyisoprene rubber, a modified polyisoprene rubber prepared by introducing from about 0.03 to 20 carboxyl groups per 100 recurring units of isoprene monomer present in the synthetic cis-1,4-polyisoprene rubber.