Abstract: A rubber injection molding device comprising: a mold having a molding cavity therein; an injecting machine including an injection cylinder having an injection chamber for storing a rubber therein, and an injection plunger for injecting the rubber from the injection chamber into the molding cavity by means of an advancement of the injection plunger; a feed machine having a feed cylinder with a feed aperture formed at a tip end thereof and connected with the injection chamber through a feed duct, and being adapted to feed into the injection chamber, through the feed duct the rubber in a mixed state, and a pushing assembly which pushes into the injection chamber the rubber that remains within the feed duct after a feed operation of the rubber by the feed machine. A manufacturing method of a rubber product by using the molding device is also disclosed.

Abstract: A rubber injection molding device comprising: a mold hang a molding cavity therein; an injecting machine including an injection cylinder having an injection chamber for storing a rubber therein, and an injection plunger for injecting the rubber from the injection chamber into the molding cavity by means of an advancement of the injection plunger; a feed machine having a feed cylinder with a feed aperture formed at a tip end thereof and connected with the injection chamber through a feed duct, and being adapted to feed into the injection chamber, through the feed duct the rubber in a mixed state, and a pushing assembly which pushes into the injection chamber the rubber that remains within the feed duct after a feed operation of the rubber by the feed machine. A manufacturing method of a rubber product by using the molding device is also disclosed.

Abstract: An electronic typewriter comprising: a keyboard having a plurality of keys and generating an encoded signal in response to the depression of each key; a printing unit having a print wheel with a plurality of type elements disposed around the periphery thereof, a step motor for rotating the print wheel, a print hammer for impacting the type element brought to a printing position, an ink ribbon, and a ribbon drive mechanism for bringing the ink ribbon to the printing position; and an electronic control circuit for coupling the keyboard to the printing unit. The electronic control circuit controls the rotation of the step motor according to the encoded signal received from the keyboard so as to bring a type element selected by the encoded signal to the printing position within a short time for executing quicker printing, and further controls the action of both the print hammer and the ribbon drive mechanism in response to the rotation of the step motor.

Abstract: An electronic typewriter comprising: a keyboard having a plurality of keys and generating an encoded signal in response to the depression of each key; a printing unit having a print wheel with a plurality of type elements disposed around the periphery thereof, a step motor for rotating the print wheel, a print hammer for impacting the type element brought to a printing position, an ink ribbon, and a ribbon drive mechanism for bringing the ink ribbon to the printing position; and an electronic control circuit for coupling the keyboard to the printing unit. The electronic control circuit controls the rotation of the step motor according to the encoded signal received from the keyboard so as to bring a type element selected by the encoded signal to the printing position within a short time for executing quicker printing, and further controls the action of both the print hammer and the ribbon drive mechanism in response to the rotation of the step motor.