Abstract: An improved quiet impact printer mechanism for use with a typewriter or printer which includes a print hammer having a significant mass for impacting a character pad against an ink ribbon, paper and a platen. A first embodiment has a drive means providing insignificant inertia through the use of a cam driven by an inexpensive, low torque reversible motor which is coupled to the hammer through a cam follower. The cam arrangement may also propel the hammer toward the platen under a predetermined series of controlled velocities. A second embodiment of a printer mechanism, similar to that described above, includes a rotary member driven by a motor link, coupled to the print hammer for moving the hammer toward and away from the platen. The motor link includes an acoustic noise reducing means.

Abstract: An improved quiet impact printer mechanism for use with a typewriter or printer which includes a print hammer having a high effective mass at the print point for impacting a character pad against an ink ribbon, paper and a platen at a relatively low velocity. The pinter mechanism drive means includes a cam driven by a low torque reversible motor for moving a cam follower. The cam follower is coupled to the hammer by means of a pin and moves the hammer towards the platen. The cam may also cause movement of the hammer toward the platen under a predetermined series of controlled velocities.

Abstract: An apparatus for pressing a print head against a platen roll in a printer, which comprises a rotating profiled cam supporting the print head for moving the print head toward and away from the platen roll, a shaft in the center of and integral with the cam for rotating the cam, the profile of the claim having an arcuate cam edged section points of which along the arcuate edge section are at a gradually and smoothly continuously increasing distance from the shaft, and a circular cam edge section seamlessly continuously adjoining the arcuate edge section, points of the circular cam edge section along the circular edge being equidistant from the shaft, whereby the print head supported from the edge section of the cam is pressed against the platen roll at a constant pressure when the print head is supported from the circular edge section of the cam.

Abstract: Apparatus for placing identification or indicia on parts of small surfaces, especially on identification labels of terminals for the identification of electrical components and circuits, whereby a printing or writing device is provided with a keyboard for selecting labeling symbols which preferably can be read on a display, as well as a guide for the bandoliered, sequenced parts to be labeled arranged opposite to the type carrier or writing device and a positioning device which carries out a stepwise relative shift between the parts and the type carrier or writing device.

Abstract: A multiple recorder printing device for recording values of variable amounts on a moving recording tape in the form of consecutive symbols of the same or different colors includes a driven common drive means to both rotate the rotary printing head and move the printing head toward and away from the recording tape. The drive means permits rotation of the rotary printing head to be momentarily arrested during the period that a printing tip on the rotary printing head is in contact with the recording tape to assure clear printing on the recording tape without smudging.