Abstract: A carton sealer is provided whereby a bent-back portion having non-sticky outer surfaces can be formed at a tip of an adhesive tape that is supplied in order to join flaps on a carton. The carton sealer of the invention can join flaps on a carton that is conveyed by adhesive tape. The carton sealer comprises: a tape sticking mechanism that applies adhesive tape from an adhesive tape supply unit onto a sticking-on region extending from a lead region on a front face of an advancing carton, through a joining region extending in the conveying direction, to a tail region on the rear face of the carton, a cutter for cutting the rear end of the adhesive tape that has been applied, and a suction head that forms a bent-back portion at the head of the following tape formed by cutting. Reduced pressure subjected to the suction head acts on and applies suction to the non-sticky surface of the adhesive tape, thereby bending the adhesive tape back so as to form a bent-back portion having non-sticky outer surfaces.

Abstract: A radio wave signal is transmitted from a radio wave transmitter according to a command from a central control unit, and a supersonic wave is transmitted from a supersonic wave transmitter held by a moving object according to this radio wave signal. A time counter in a supersonic wave detecting device determines the time required from the transmission of the radio wave signal to the detection of the supersonic wave. A coordinate position of the object is calculated on the basis of the thus-obtained time data from a plurality of the supersonic wave detecting devices and positional data of the supersonic wave detecting devices to control the lighting direction of a lighting projector according to a command signal from the central control unit referring to a positional data of the lighting projector.

Abstract: A method and apparatus for forming a fog screen for use in the projection for display of an optical image which comprises disposing a pair of substantially parallel air curtains and blowing a fog into the space defined by and between the air curtains. The fog screen is high and uniform in density and can be utilized for forming a well-defined image thereon that is free from distortions or interruptions.