Preh-werke Gmbh Co. Kg

Dieter Weber

Gerhard Hochgesang

Jurgen Oelsch

Klaus Schmoeger

Rudolf Limpert

A one-piece keyboard housing in a simple but compact manner is provided by using an internal gas pressure injection molding process (air mold process). With this process, the keyboard housing can be formed as a one-piece molded part with recesses and cavities. The cavity serves to reduce weight, and the process itself improves stability within the keyboard housing. The molded part is formed of a traylike first housing shell, in which a keypad can be mounted, and a second housing shell with recesses that joins the first housing shell in an n-shape.

Keyboard, especially for electronic payment terminals, and keypad

A data input device for an electronic data processing device such as a personal computer includes an input keyboard, which has a key field, a casing and a plug-in receptacle for a keyboard plug on a circuit connector; and a connector, such as a junction cable, which has a keyboard plug which fits into the receptacle on the keyboard, a circuit connector which is a connection wire, a plug at the end of the connection wire connecting with the electronic data processing device, and programmable encoder electronics for encoding unique signals corresponding to each key in the key field on the keyboard. A portion of the encoder electronics, in which the program relating the keyboard to the electronic data processing device is encoded, is located within the keyboard plug and not within the keyboard itself.

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Stockheim, Germany

Dieter Weber