Control of ribbon feed during erasing in an impact printer

Details Control of ribbon feed during erasing in an impact printer Control of ribbon feed during erasing in an impact printer

1992-07-20

1993-03-30

Wiecking, David A.

Typewriting machines

Means auxiliary to typewriting function

Means for correcting typing errors

400232, B41J 2926

Patent

active

051978130

ABSTRACT:
An impact printer for recording onto a sheet by striking an ink ribbon and for correcting the recorded data by striking a correction ribbon. The printer comprises: a platen to support a recording sheet; a print hammer to strike a recording ink ribbon and a correction ribbon onto the sheet; a supply reel to feed the ink ribbon; a first memory to store ink ribbon feeding amounts in the case where the ink ribbon and correction ribbon are overlaid and struck by the recording head to thereby correct the recorded data; a controller to control the supply reel on the basis of the ink ribbon feeding amount stored in the first memory and to feed the ink ribbon upon correction; and a second memory to store types of correction ribbons. The controller reads out the ink ribbon feeding amount from the first memory on the basis of the type of the correction ribbon and changes the ink ribbon feeding amount of the supply reel in accordance with the type of recording ribbon which is used. The mechanism to lift up and down the ink ribbon and correction ribbon is provided on only one side of the carriage. With this printer, the ink ribbon can be efficiently used upon correction and the up/down mechanism of the ribbons can be simplified.

REFERENCES:
patent: 3741364 (1973-06-01), Becker
patent: 3997046 (1976-12-01), Wolowitz
patent: 4268181 (1981-05-01), Decker
patent: 4492485 (1985-01-01), Gall
patent: 4611938 (1986-09-01), Rettke
patent: 4753542 (1988-06-01), Moritz et al.

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