GB1412467A - Control system for a high speed page printer - Google Patents
Control system for a high speed page printerInfo
- Publication number
- GB1412467A GB1412467A GB4871272A GB4871272A GB1412467A GB 1412467 A GB1412467 A GB 1412467A GB 4871272 A GB4871272 A GB 4871272A GB 4871272 A GB4871272 A GB 4871272A GB 1412467 A GB1412467 A GB 1412467A
- Authority
- GB
- United Kingdom
- Prior art keywords
- character
- rom
- matrix
- row
- dot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
- G06K15/10—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by matrix printers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Dot-Matrix Printers And Others (AREA)
Abstract
1412467 Control of printers MULLARD Ltd 23 Jan 1974 [23 Oct 1972] 48712/72 Heading G4H The invention relates to circuitry for feeding printing signals to a dot-matrix page printer. Each character is in the form of a 7 Î 5 matrix on a 17-line, 64-character page, corresponding characters on each line being built up simultaneously by the simultaneous printing of corresponding dots in each character in the order shown in Fig. 2. The paper is moved continuously so that the printed characters are skewed; each dot in a row may be duplicated for clarity. Each character to be printed is input via K1 in ASC11 code to shift registers SR1, SR2 alternately, and then used to access a dot matrix character generator ROM which outputs a column at a time under the control of a counter Cl. The row dots in each column are selected by gates G13-G19 enabled by a decoder Dl under the control of a column counter C2; ROM is accessed 35 times for the 17 characters to be printed together, when C1 and C2 hold their counts until the required 17 bits have passed through one of G13-G19. These bits are fed alternately to 17-stage registers SR3, SR4 to provide outputs 1-17 via gates G20- G36 or G37-G53 to the print head. A row-scan ROM may be used (Fig. 6, not shown) the choice of ROM also determining the matrix size. The capacity of SR3, SR4 corresponds to the number of lines per page.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4871272A GB1412467A (en) | 1972-10-23 | 1972-10-23 | Control system for a high speed page printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4871272A GB1412467A (en) | 1972-10-23 | 1972-10-23 | Control system for a high speed page printer |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1412467A true GB1412467A (en) | 1975-11-05 |
Family
ID=10449644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4871272A Expired GB1412467A (en) | 1972-10-23 | 1972-10-23 | Control system for a high speed page printer |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1412467A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2718519A1 (en) * | 1976-06-28 | 1978-01-05 | Xerox Corp | TYPE CONVERSION DEVICE |
EP0012858A1 (en) * | 1978-12-26 | 1980-07-09 | International Business Machines Corporation | Display and recording apparatus |
GB2119982A (en) * | 1982-05-10 | 1983-11-23 | Xerox Corp | Printer |
-
1972
- 1972-10-23 GB GB4871272A patent/GB1412467A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2718519A1 (en) * | 1976-06-28 | 1978-01-05 | Xerox Corp | TYPE CONVERSION DEVICE |
EP0012858A1 (en) * | 1978-12-26 | 1980-07-09 | International Business Machines Corporation | Display and recording apparatus |
GB2119982A (en) * | 1982-05-10 | 1983-11-23 | Xerox Corp | Printer |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |