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US 4,749,289 AGranted
Printing device for attribute printing
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsYoshio Sugiura, Kiyoshi Yamakawa
Life of this patent
Estimating the term…
Abstract
In a printer for printing an attributed character by printing a character part and an attribute part separately, the invented printer or typewriter is so constructed that only an attribute part, e.g., an underline part or a bold face part, is printed in case a printed character is detected to already have the attribute, i.e., is underlined, or bold face, thereby preventing a character part of the printed character from being double printed. This results in improved quality in printed characters and in complete clear character erasures. The printer is also effective for overprinting attribute parts to over a desired range of printed characters.
Claims10
A printer for printing an attributed character composed of a character part and an attribute part by printing the character part and the attribute part separately, comprising:
- a character memory for storing a plurality of character data each representative of a printed character including information of the character part of the printed character and information of the attribute part of the printed character;
- a pointer memory for storing pointer data representative of an address of the character data in the character memory, the character data corresponding to the printed character at which a print head is located;
- and
- attribute print means, responsive to a command from outside for printing the attribute part if the printed character at which the print head is located does not have the attribute part and for preventing printing of the attribute part if the printed character has the attribute part.
1 more element
A typewriter comprising:
- a keyboard provided with at least character keys and an underline mode key;
- a print head for printing a plurality of characters including an underline part;
- a character memory for storing a plurality of character data each representative of a printed character including information of a character part and information of an underline part of the printed character;
- a pointer memory for storing pointer data representative of an address of the character data in the character memory, the character data corresponding to the printed character at which the print head is located;
- detection means responsive to an operation of the underline mode key for detecting whether the character data in the character memory addressed by the pointer data has the information indicating an underline part;
- and
- underline print means for printing the underline part with the print head if the detection means detect that the character data does not have the information indicating the underline part, and for preventing printing of the underline part if the detection means detect that the character data has the information indicating the underline part.
4 more elements
A typewriter comprising:
- a keyboard provided with at least character keys and an additional underline key for adding an underline beneath an already printed character;
- a print head for printing a plurality of characters including an underline part;
- a character memory for storing a plurality of character data each representative of a printed character including information indicating an underline of the printed character;
- a pointer memory for storing pointer data representative of an address of the character data in the character memory, the character data corresponding to the printed character at which the print head is located;
- detection means responsive to an operation of the additional underline key for detecting whether the character data in the character memory addressed by the pointer data has the information indicating an underline;
- underline print means for printing the underline with the print head if the detection means detect that the character data does not have the information indicating an underline, and for preventing printing of the underline part if the detection means detect that the character data has the information indicating an underline;
- and
- correction means for furnishing the underline information to the character data if the underline is printed by the underline print means.
5 more elements
A typewriter comprising:
- a keyboard provided with at least character keys and a bold conversion key for converting an already printed character into a bold face character;
- a print head for printing a plurality of characters;
- a character memory for storing a plurality of character data each representative of a printed character including an information indicating bold face of the printed character;
- a pointer memory for storing pointer data representative of an address of the character data in the character memory, the character data corresponding to the printed character at which the print head is located;
- detection means responsive to an operation of the bold conversion key for detecting whether the character data in the character memory addressed by the pointer data has the information indicating bold face;
- bold print means for completing a bold character by printing a character corresponding to the character data addressed by the pointer data with the print head at a small distance from the printed character if the detection means detect that the character data does not have the information indicating bold face, and for preventing printing if the detection means detects that the character data has the information indicating bold face;
- and
- correction means for furnishing the information indicating bold face to the character data if the bold character is completed by the bold print means.
5 more elements
Dependencies are inferred from the claim text.