Print head control for subscript and superscript correction
AssigneeBrother Kogyo Kabushiki Kaisha
InventorNaohisa Kaneko
Life of this patent
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Abstract
Disclosed is a text processing system such as a word processor and an electronic typewriter. The disclosed system comprises memory means for storing character data and shift data indicating a character be printed on a line shifted upward or downward from a standard print line. Control means is operated to move a print head along the standard print line when a space or backspace key is operated, but is not operated to feed a print sheet even when the shift data are stored in the memory means for a character on which the print head is currently positioned.
Claims12
A text processing system having erasing capabilities and for printing regular characters intermixed with subscripts and superscripts, said system comprising:
- a print head for printing characters on a print sheet in response to character data;
- print head driving means for reciprocating said print head along a print line on the print sheet;
- line feed means for feeding the print sheet in directions perpendicular to the print line in response to shift data for printing and erasing one of a subscript or superscript;
- first input means for inputting said character data;
- second input means for inputting said shift data for operating said line feed means to print characters on a line shifted from a standard print line;
- third input means for generating a print head reciprocating signal to energize said print head driving means;
- first memory means for storing said character data and said shift data for each character to be printed;
- character correction means operated in response to operation of a correction key to erase a character which has been erroneously printed;
- control means responsive to said character correction means for (1) controlling said print head drive means in response to said print head reciprocating signal such that said print head is driven by said print head driving means to be reciprocally moved to any desired inputted character position on said standard print line character position by character position just along the standard print line even when said shift data has been stored in said first memory means and (2) for controlling said line feed means to respond to shift data.
A text processing system for printing regular characters intermixed with shifted characters, said system comprising:
- a print head for printing characters on a print sheet in response to character data;
- print head driving means for reciprocating said print head along a print line on the print sheet;
- line feed means for feeding the print sheet in directions perpendicular to the print line;
- first input means for inputting said character data;
- second input means for inputing shift data for operating said line feed means to print characters on a line shifted from a standard print line;
- memory means for storing at least said character data and said shift data for each character to be printed and the data relating to a reciprocal movement of said print head;
- judging means for judging whether at least one shift data has been stored in said memory means;
- first control means for controlling said print head drive means and said line feed means so as to drive said print head character position by character position based upon the shift data and said data relating to a reciprocal movement of said print head stored in said memory means;
- and
- second control means for controlling said print head drive means so as to reciprocally drive said print head character position by character position to any desired inputted character position along said standard print line regardless of the shift data having been stored in said memory means even when it is judged by said judge means that the shift data are stored is said memory means.
Dependencies are inferred from the claim text.