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Patent US4901248A successfully refreshed from Google Patents.
US4901248A
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Printing device with compressed text data memory
Assignee: Brother Industries Ltd
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Filing: 1987-12-30
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Granted: 1990-02-13
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Expires: 2007-12-30
Abstract
Abstract A printing device with a data memory efficiently stores character code data and other attribute data in a limited memory region. If a character code of a print data input from the keyboard is a space code, the print data is nullified, and a pitch data corresponding to the space code is added to the pitch data corresponding to the character code previously stored in a correction memory. Namely, the data are compressed. Since only the print data excepting the space code data is stored in the memory, the limited memory region is efficiently used.
Inventors
- 👤 Hideo Ueno
- 👤 Keiko Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:01
CPC Classifications
H; H03; H03M; H03M7/00; H03M7/30; G; G06; G06F; G06F40/00; G06F40/10; G06F40/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
A printing device with a text data memory and a printing head, the printing device comprising: input means for inputting character data and space data; data coding means for making a first character print data by combining a character code data corresponding to the character data input through the input means and a normal printing pitch data when the character data is followed by another character data, and for making a second character print data by combining a character code data corresponding to the character data input through the input means and an extended printing pitch data when the character data is followed by a space data; and data storing means for serially storing the first and second character print data in the text data memory.
Claim 2
Dependent Claim
126 words
A printing device with a text data memory and a printing head, the printing device comprising: input means for inputting character data and space data; data coding means for making a first character print data by combining a character code data corresponding to the character data input through the input means and a normal printing pitch data when the character data is followed by another character data, and for making a second character print data by combining a character code data corresponding to the character data input through the input means and an extended printing pitch data when the character data is followed by a space data; and data storing means for serially storing the first and second character print data in the text data memory.
Claim 3
Dependent Claim
12 words
An electronic typewriter equipped with the printing device according to claim 1.
Claim 4
Dependent Claim
12 words
A word processor equipped with the printing device according to claim 1.
Claim 5
Dependent Claim
82 words
A printing device according to claim 1, wherein each of the normal printing pitch data and the extended printing pitch data is one-bit data, and the printing device further comprises a printing controller for printing a character and proceeding the printing head by one character pitch responsive to the print data including the normal printing pitch data, and for printing a character and proceeding the printing head by two character pitches responsive to the print data including the extended printing pitch data.
Claim 6
Dependent Claim
78 words
A printing device according to claim 4, wherein the data coding means further includes means for making a first space print data by combining a space code data and the normal printing pitch data when the space data follows the print data including the extended printing pitch data, and for making a second space print data by combining the space code data and the extended printing pitch data when the space data follows the first space print data.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |