G - Physics – 06 – F
Patent
G - Physics
06
F
354/236.5
G06F 11/00 (2006.01) G07G 1/12 (2006.01) G07G 5/00 (2006.01)
Patent
CA 1076032
Abstract An electronic cash register comprises a keyboard having a date key and a void key, a central processor unit coupled to the keyboard and a read only memory coupled to the central processor unit. The read only memory has a program stored in it. A memory is coupled to the central processor unit and includes a printing data memory for storing an input data item supplied from the data input key and the total of a plurality of the input data items. There is a printing apparatus, which includes a buffer register, a printer driver and a printer for printing the plurality of input data items and their total successively on a recor- ding paper. The printing driver includes a feeder to feed the recording paper by one row for printing a new data item when that item is supplied to the buffer register. The printing driver also has an inhibitor for inhibiting the one row feeding of the recording paper when the void key is depressed and for printing a correcting symbol directly on a data item printed on the paper before the new data item is supplied to the buffer register. Thus the erroneous recognition of the corrected data is prevented.
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