Nixdorf Computer Ag

Siemens Nixdorf Informationssysteme Aktiengesellschaft

Protechno Ces Gmbh & Co Kg

Jurgen Hilkenmeier

Hans-Werner Volke

Udo Tewes

Hermann Kohlhage

Hans W Volke

An electromagnetic drive mechanism for a pin in a matrix printing head has a first magnet with an articulated armature, wherein a free end of the armature acts on the pin and can be returned to a disengaaged position by a recovery mechanism. The recovery mechanism comprises another articulated-armature magnet with an armature identical with that of the first magnet but with a yoke mounted on a side of the armature that faces away from a yoke of the first magnet.

Matrix printing head with forward and return articulated-armature magnets

Matrix printing head with pivotable armatures

Printing or recording apparatus for the selective printing of single sheets or margin-perforated endless paper in which for the endless paper operation a separate conveying unit can be put in place on the printer housing which unit is provided with conveying means engaging in the perforated margin of the endless paper. The sight case of the conveying unit is arranged over the feed opening as well as the delivery unit for the single sheets. A movable lid permits access to these openings for the single-sheet operation but covers these completely and in a soundproofing way for endless paper operation. Connected with the movable lid there is a prop which in the closed position of the lid automatically lifts off the platen the feed rolls not required in this operating state.

Printing and typing apparatus for the selective printing of single sheet

Printing apparatus with a roller platen and a plastic strip for holding paper against the roller platen even if insufficient paper is fed through to reach the usual guide rollers. The plastic strip is arranged in a closed loop and is connected to the print element to move with it in the line direction. The strip has a perforation for the penetration of printing type or the like.

Printing or typing apparatus with a rotating platen as well as guide

Apparatus for guiding an ink ribbon for a printer, with top edges standing perpendicularly to and inclined forward toward the printing plane, over which the ink ribbon laid on flange plates which act as slides when fed further and threads in itself. At the same time means for the quick fixing of the print head are provided on the apparatus serving for the guiding of the ink ribbon.

Growing community of inventors

Paderborn, Germany

Jurgen Hilkenmeier