Keyboard apparatus

A keyboard apparatus, comprising:

• key switch means having a set of item keys for performing data entry and having means associated with each item key for displaying a data item to be entered by the corresponding data key, said set of item keys being arranged in a display position, and a set of select keys for selecting sets of input data items corresponding to said item keys and to be displayed in said display means;
• a plurality of sheets on which respective sets of input data items are positioned in positions corresponding to the positions of said display means;
• a cartridge having a tray means for storing said sheets in piles and which is movable transversely of said cartridge means;
• cartridge holding means for holding said cartridge in a first position from which said tray means is movable transversely of said cartridge means to a position corresponding to said display position in which the input data items on the top sheet in said tray means are displayed in the corresponding display means;
• selecting means operable in response to said select keys for separating said sheets in said tray means into two groups and holding the sheets in the first group out of said tray means and leaving the sheets in the second group in said tray means;
• and
• translating means engagable with said tray means and operable in response to said select keys for moving said tray means from said position corresponding to said display condition to said first position and holding said tray means in said first position while said selecting means operates to release a previously held first group of sheets and allow them to return into said tray means and to separate and hold a new first group of sheets, and then moving said tray means back to said position corresponding to said display position.