A high speed printing apparatus in which a plurality of type wheels each having a helical spring disposed therein are rotatably mounted on a shaft in side-by-side relation, with one end of the helical spring anchored to the type wheel and the other end thereof anchored to an operation bar to bias the type wheel in one direction, and the type wheels are rotated all at once by rotating the operation bar and stopped by respective associated selection members when the type faces to be printed of the respective type wheels are located in the printing position.
Line printer having a plurality of rotatable printing rings coaxially arranged adjacent each other and carrying on the peripheries thereof a plurality of characters for the printing and a movable roller pad adapted to abut against the printing rings at the predetermined printing position so that the selected characters of the printing rings held at the printing position are simultaneously printed on a paper held between the printing rings and the roller pad so as to form simultaneously a line of printing thereon in each printing cycle. The printing rings are rotated in the same direction in each printing cycle in order to eliminate a complicated mechanism for reciprocally driving the printing rings. The selection of the characters, temporary arresting of the same at the printing position and the printing operation by the roller pad are effected during a first half cycle of each printing cycle while the paper feeding and the releasing of the characters from the printing position are effected during the last half cycle of each printing cycle by way of a single common driving shaft.
A parallel printer including an improved reset mechanism for resetting a ratchet and pawl mechanism after printing, is provided. An axially rotatable shaft having notched portions associated with each pawl effects a pivoting of each pawl out of engagement with the corresponding ratchet wheel and returns each pawl to a rest position to complete a printing cycle.
A mechanism for actuating a platen of a printer in which a cooperating pin and lever are provided to permit a plurality of printing rings with the desired characters thereon to be printed to be placed into a printing position, to move a platen into abutting engagement with the printing rings and hold them engaged for printing, all during a first period of time, and to remove the platen from the printing rings during a second period of time, and in which the first time period is about two to three times longer than the second time period so that the speed of the printer for each printing operation is increased.
4161912 - Miniature printer - Owned by Shinshu Seiki Kabushiki Kaisha (Suwa,JP) Kabushiki Kaisha Suwa Seikosha (Tokyo,JP)
A miniature printer especially suitable for use in a small calculator or the like, utilizes the energy released from a spring storage means to power the printing, paper feeding, and inking operations. The energy is stored by the spring from either manual operation or motor power.
A printing apparatus in which a comma printing mechanism prints commas at any desired location within a printed number. Comma printing is accomplished by comma hammers, with one hammer provided between each two numerical places of the printing apparatus. All the comma hammers are initially maintained in a nonprinting position, and all are moved to an intermediate position prior to the printing of a number. Selected comma hammers, corresponding to the locations within a number at which comma printing is desired, are then advanced to a printing position, and the number is printed. After the number and selected commas are printed, the comma hammers are returned to the initial nonprinting position.
