Abstract: A cam mounting gear having a number of teeth smaller by one than the number of teeth of a main gear which is driven to rotate is disposed in parallel to the main gear, and a cam having a tapered face formed thereon such that the thickness thereof gradually increases along an inner periphery thereof is disposed on an inner wall of the cam mounting gear. A main holder having a cutter blade and a bearing which contacts with the cam is supported for rotation on a flat face portion of the main gear. As rotation of the main gear is transmitted to the cam mounting gear via a pinion, the bearing of the main holder is driven to roll on the tapered face of the cam, and thereupon, the cutter blade is displaced in a direction toward the center of the apparatus to cut a cutting object pipe located at a central location of the apparatus.

Abstract: A printer system for printing a given pattern on a base board includes a screen plate to be positioned above the base board. The screen plate has a perforated print pattern defined thereby. A printer proper is employed which includes an ink container chamber and an ink squeezing device. The ink squeezing device runs on the screen plate pressing the same against the base board while squeezing a given amount of viscous ink onto an upper surface of the screen plate. A cleaning device is employed for cleaning residual of ink left on a lower surface of the screen plate and an ink supplier is employed for feeding the ink container chamber of the printer proper with a fresh viscous ink when needed. An ink supplier is employed for feeding the printer device with a fresh viscous conductive ink when needed.

Abstract: A printer system prints a given pattern of viscous conductive ink on a base board with the aid of a screen plate. The system has a printer device which moves horizontally when carrying out printing. The printer device includes two spaced side walls. Two stationary parallel rails extend horizontally to respectively support, through the screen plate, the side walls of the printer device during the horizontal movement of the printer device. The screen plate is tightly placed on the rails. A supporting device is employed for stationarily supporting the base board under the screen plate.

Abstract: A printer system for printing a given pattern on a base board is described which comprises a screen plate to be positioned above the base board. The screen plate has a perforated print pattern defined thereby. A printer proper is employed which includes an ink container chamber and an ink squeezing device. The ink squeezing device runs on the screen plate pressing the same against the base board while squeezing a given amount of viscous ink onto an upper surface of the screen plate. A cleaning device is employed for cleaning residual of ink left on an lower surface of the screen plate and an ink supplier is employed for feeding the ink container chamber of the printer proper with a fresh viscous ink when needed.

Abstract: A transporter for carrying on a surface an object having a center of gravity, the transporter including a first arm having a longitudinal center line which is arranged to lift the object; a second arm operatively connected to the first arm at one end thereof; a wheel rotatably mounted to the second arm, the wheel having an axis of rotation, the first arm being disposed relative to the wheel so that the longitudinal center line of the first arm intersects the axis of the wheel; a sensor for sensing a variation of an inclination angle of the second arm relative to the surface; and a drive mechanism, connect to the sensor, for driving the first arm, the sensor controlling the drive mechanism such that the drive mechanism moves the first arm in response to the sensed variation of the inclination angle of the second arm relative to the surface so as to maintain the center of gravity of the object above the axis of the wheel regardless of the inclination of the second arm relative to the surface.

Abstract: A printer system for printing a given pattern on a base board is described which includes a screen plate to be positioned above the base board. The screen plate has a perforated print pattern defined thereby. A printer proper is employed which includes an ink container chamber and an ink squeegeeing device. The ink squeegeeing device runs on the screen plate pressing the same against the baseboard while squeegeeing a given amount of viscous ink onto an upper surface of the screen plate. A cleaning device is employed for cleaning residual of ink left on an lower surface of the screen plate and an ink supplier is employed for feeding the ink container chamber of the printer proper with a fresh viscous ink when needed.

Abstract: A method for printing solder paste onto a surface of a printed circuit board through the medium of a screen having openings. The method includes feeding the paste into a chamber of a dispenser, dispensing the paste contained in the chamber onto a first side of the screen and onto the surface of the board from the dispenser through a slit-like aperture, removing paste residue from the first side of the screen by a blade extending from a first cleaning apparatus, removing paste residue from a second side of the screen by another blade extending from a second cleaning apparatus, and sucking and transporting the paste residue adhered to inner peripheral surfaces of openings in the screen as well as the paste residue being removed from the second side of the screen by a vacuum device connected to the second cleaning apparatus. The slit-like aperture of the dispenser is formed by a fixed front wall and a moveable rear wall selectively moving toward and away from the fixed front wall.

Abstract: A screen printing apparatus for printing solder paste onto a surface of a printed circuit board through the medium of a screen having openings. The apparatus includes a solder paste automatic supply dispenser of a nonflexible box-like structure which is arranged to be displased along a pair of guide rails back and forth and to be raised and lowered relative to the guide rails. The dispenser has a chamber for containing solder paste to be printed on the surface of the circuit board and an adjusting device attached to the dispenser for adjusting the temperature of the solder paste contained in the chamber so as to be capable of maintaining the temperature at a predetermined degree.

Abstract: A handtruck for use in carrying a load, comprises springs installed on a frame, a connection shaft received rotatably in bearings mounted on the opposite end portion of the springs and substantially parallel with the lateral extend of the frame, a support member for supporting a first pair of wheels which is fixed to the connection shaft, and another support member for supporting a second pair of wheels which is also firmly fixed to the same. A rotation shaft is rotatably mounted on the support member for supporting the second pair of wheels in order to cause the second wheels to rotate around the shaft axis approximately normal to the axis of the connection shaft.

Abstract: A printed wiring board tester which comprises first and second fixture members disposed in spaced-apart, substantially parallel relationship with respect to each other, a plurality of probe pins disposed between the first and second fixture members, and slidably extending therethrough, the probe pins comprising a first pin element having a large diameter section connected with a small diameter section by a stepped portion, the larger diameter section having a free end which is provided for engagement with the terminal area of a printed wiring board to be tested, a cylindrical second pin element divided into large and small diameter sections, the larger diameter section slidably fitting over the small diameter section of the first pin element with the end thereof defining a stopper jaw which engages the stopped portion, and a cord connecting element extending into and connected to the small diameter section of the second pin element, and a third pin element comprising a coiled spring member which is loosely fi