Abstract: A control panel supports and positions interchangeable subunit electronic devices and provides a neat and uniform outwardly facing surface. When subunit electronic devices are disconnected from the control panel, cover plates extend and conform to the uniform outwardly facing surface. Hinged support members "lock" in an over center position to rigidly support each cover plate. Electrical connectors protruding from each subunit electronic device "unlock" the hinged support members from the over center position when the subunit electronic device is urged toward the cover plate.

Abstract: Electrographic paper is fed over a segmented platen where its dielectric surface receives image defining electrostatic charges deposited by styli bearing directly and successively upon it. The styli are integral to an endless belt moving laterally to the surface. Voltage pulses corresponding to the input information are applied to the segmented platen to produce the electrostatic charges. The latent image charged surface is progressively fed to an image toning and fixing cycle to produce a hard copy.

Abstract: Electrographic paper is fed over a segmented platen where its dielectric surface receives image defining electrostatic charges deposited by styli bearing directly and successively upon it. The styli are integral to an endless belt moving laterally to the surface. Voltage pulses corresponding to the input information are applied to the segmented platen to produce the electrostatic charges. The latent image charged surface is progressively fed to an image toning and fixing cycle to produce a hard copy.