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US 5,123,760 AGranted
Printer with variable ribbon shifting mechanism
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsYoshio Tsuru, Yasunari Yoshida, Shin Nakagawa
Life of this patent
Estimating the term…
Abstract
A printer comprising printing head moving means, printing ribbon feeding means, ribbon printing position change means and printing control means, in which printing control means gives instruction signals to regulate the crosswise move of the ribbon or to change the number of shift instruction signals less at both the ends of the ribbon to make the usage frequency substantially uniform with the central region.
Claims18
A printer that prints under control of print data, comprising:
- a print head for printing on a print medium according to the print data;
- a print ribbon extending in the direction of the printing lines, where a width of the print ribbon is larger than the print head and the width of the print ribbon contains two side regions and a central region located between the two side regions;
- a print-ribbon shift means for shifting the print ribbon;
- a print-ribbon feed means for feeding the print ribbon across the print head in the direction of the printing lines;
- and
- a control means for controlling the print-ribbon shift means such that the ratio of a shift amount of the print ribbon to feed amount of the print ribbon is greater when the central region of the print ribbon is adjacent to the print head than when one of the two side regions is adjacent to the print head.
3 more elements
A printer that prints under control of print data, comprising:
- a print head for printing on a print medium according to the print data;
- a print-head moving means for moving the print head along printing lines of the print medium;
- a print ribbon extending in the direction of the printing lines, where a width of the print ribbon is larger than the print head and the width of the print ribbon contains two side regions and a central region located between the two side regions;
- a print-ribbon feed means for feeding the print ribbon across the print head in the direction of the printing lines according to feed signals;
- a print-ribbon shift means for shifting the print ribbon in two directions across the print head
- according to shift and change direction signals;
- a control means for sending feed signals to the print-ribbon feed means and shift signals and change direction signals to the print-ribbon shift means;
- wherein
- the control means sends one feed signal for each shift signal when the print head is adjacent to the central region;
- and
- the control means sends a plurality of consecutive feed signals, a change direction signal, and a shift signal when the print head is adjacent to one of the two side regions.
8 more elements
A printer that prints under control of print data, comprising:
- a print head for printing on a print medium according to the print data;
- a print-head moving means for moving the print head along printing lines of the print medium;
- a print ribbon extending in the direction of the printing lines, where a width of the print ribbon is larger than the print head and the width of the print ribbon contains two side regions and a central region located between the two side regions;
- a print-ribbon feed means for feeding the print ribbon across the print head in the direction of the printing lines according to feed signals;
- a print-ribbon shift means for shifting the print ribbon first and second shift distances in two directions across the print head according to first shift signals, second shift signals, and change direction signals, where the first shift distance is longer than the second shift distance;
- a control means for sending feed signals to the print-ribbon feed means and first shift signals, second shift signals, and change direction signals to the printribbon shift means;
- wherein
- the control means sends one first shift signal for each feed signal when the print head is adjacent to the central region;
- and
- the control means sends one second shift signal for each feed signal and a change direction signal when the print head is adjacent to one of the two side regions.
7 more elements
Dependencies are inferred from the claim text.