Paper towel dispenser apparatus for dispensing paper toweling from a roll of paper toweling responsive to a pulling force being applied to said paper toweling at a location on said toweling, the paper towel dispenser apparatus including: a housing; a roll support (14, 16) operatively associated with said housing for rotatably supporting the roll of paper toweling; a rotatable toweling support roller within said housing spaced from said roll support (14, 16) for receiving toweling from the roll of paper toweling and supporting the toweling, said toweling support roller having a cylindrically-shaped outer peripheral portion having an external surface and being rotatable in a predetermined direction of rotation when a pulling force is applied to toweling supported thereby; a cutter blade having a cutting edge, said cutter blade pivotally movable between a first and a second position, wherein in the first position said cutter blade lies substantially flat against the toweling support roller with the cutting edge thereof positioned closely adjacent to the external surface of said cylindrically-shaped outer peripheral portion and wherein in the second position said cutter blade is disposed at an angle relative to the external surface of said cylindrically-shaped outer peripheral portion with the cutting edge thereof spaced from the external surface of said cylindrically-shaped outer peripheral portion, the cutting edge of the cutter blade when said cuter blade is in said second position engaging toweling on the toweling support roller during rotation of the toweling support roller to sever the toweling due to the pulling force and tensioning of said toweling; and blade actuator means for pivoting said cutter blade between the first and second positions responsive to rotation of said toweling support roller due to the pulling force being applied to said toweling and tensioning of said toweling, characterized in that the blade actuator means includes cam followers attached to the ends of said cutter blade, each cam follower including a cam follower arm and a roller riding in a channel of a cam, said cutter blade being pivotally mounted on said toweling support roller about a pivot located at the cylindrically-shaped outer peripheral portion and pivotally movable about the pivot between the first position and the second position, said cutter blade when in said second position projecting outwardly away from said pivot located at the cylindrically-shoped outer peripheral portion in a direction generally opposed to the direction of rotation of said toweling support roller, and said cutter edge of the cutter blade being always disposed externally of said toweling support roller in both said first position and said second position and also when moving between said first position and said second position. a housing; a roll support (14, 16) operatively associated with said housing for rotatably supporting the roll of paper toweling; a rotatable toweling support roller within said housing spaced from said roll support (14, 16) for receiving toweling from the roll of paper toweling and supporting the toweling, said toweling support roller having a cylindrically-shaped outer peripheral portion having an external surface and being rotatable in a predetermined direction of rotation when a pulling force is applied to toweling supported thereby; a cutter blade having a cutting edge, said cutter blade pivotally movable between a first and a second position, wherein in the first position said cutter blade lies substantially flat against the toweling support roller with the cutting edge thereof positioned closely adjacent to the external surface of said cylindrically-shaped outer peripheral portion and wherein in the second position said cutter blade is disposed at an angle relative to the external surface of said cylindrically-shaped outer peripheral portion with the cutting edge thereof spaced from the external surface of said cylindrically-shaped outer peripheral portion, the cutting edge of the cutter blade when said cuter blade is in said second position engaging toweling on the toweling support roller during rotation of the toweling support roller to sever the toweling due to the pulling force and tensioning of said toweling; and blade actuator means for pivoting said cutter blade between the first and second positions responsive to rotation of said toweling support roller due to the pulling force being applied to said toweling and tensioning of said toweling, characterized in that the blade actuator means includes cam followers attached to the ends of said cutter blade, each cam follower including a cam follower arm and a roller riding in a channel of a cam, said cutter blade being pivotally mounted on said toweling support roller about a pivot located at the cylindrically-shaped outer peripheral portion and pivotally movable about the pivot between the first position and the second position, said cutter blade when in said second position projecting outwardly away from said pivot located at the cylindrically-shoped outer peripheral portion in a direction generally opposed to the direction of rotation of said toweling support roller, and said cutter edge of the cutter blade being always disposed externally of said toweling support roller in both said first position and said second position and also when moving between said first position and said second position.