US4615012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of generating character patterns
Assignee: Alps Alpine Co Ltd
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Filing: 1983-12-09
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Granted: 1986-09-30
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Expires: 2003-12-09
Abstract
Abstract A method of generating character patterns to be printed on a printer, wherein each character is divided into line segments in the X or Y axis direction or 45°-angle direction on the X/Y coordinates. Segments are processed in pairs of contiguous, linked lines. The method eliminates the need for storing positional data for the node of linked lines, whereby the capacity of memory for storing numerous complex character patterns can be saved.
Inventors
- 👤 Shuichi Arazu
- 👤 Tadao Tamukai
- 👤 Kyuichi Fujisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:24
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06V; G06V10/00; G06V10/20; G06V10/34; G06K2215/00; G06K2215/0002; G06K2215/002; G06K2215/0028
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A method for generating a character pattern which includes a first line of predetermined inclination linked to a second line which is horizontal or vertical with respect to a coordinate grid where the unlinked ends of said first and second lines define respectively a start point and an end point, comprising the steps of: providing horizontal and vertical coordinates of said start and end points to an arithmetic processor, determining the direction in which the first line must travel in order to approach the end point from said starting point, generating a direction polarity signal based on said determination, drawing the first line in the direction indicated by said direction polarity signal by generating horizontal and vertical drive signals responsive to said direction polarity signal, and stopping the respective one of said two drive signals when the respective horizontal or vertical coordinate of the first line being drawn equals a respective horizontal or vertical coordinate of the end point so that the second line having no inclination is drawn thereby.
Claim 2
Independent Claim
170 words
A method for generating a character pattern which includes a first line of predetermined inclination linked to a second line which is horizontal or vertical with respect to a coordinate grid where the unlinked ends of said first and second lines define respectively a start point and an end point, comprising the steps of: providing horizontal and vertical coordinates of said start and end points to an arithmetic processor, determining the direction in which the first line must travel in order to approach the end point from said starting point, generating a direction polarity signal based on said determination, drawing the first line in the direction indicated by said direction polarity signal by generating horizontal and vertical drive signals responsive to said direction polarity signal, and stopping the respective one of said two drive signals when the respective horizontal or vertical coordinate of the first line being drawn equals a respective horizontal or vertical coordinate of the end point so that the second line having no inclination is drawn thereby.
Claim 3
Dependent Claim
33 words
The method of claim 1 further comprising the step of stopping the second of said two drive signals when the coordinates of the line being drawn equal the coordinates of the end point.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein said direction determining step comprises: subtracting the end point coordinates from their respective start point coordinates.
Claim 5
Dependent Claim
65 words
The method of claim 3 wherein the results of said subtraction are applied each to a respective comparator and the coordinates of the line being drawn are tracked by a pair of counters whose output are applied and to a respective one of said comparators it can be determined when either of said end point coordinates equals a respective coordinate of the line being drawn.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein said predetermined inclination is 45 degrees.
Claim 7
Dependent Claim
38 words
The method of claim 1 further comprising the step of transferring the end point coordinates in the arithmetic unit to replace the start point coordinates and inputting new start point coordinates when a new drawing cycle is desired.
References Cited (Backward Citations)
US3047851A
Cited
US3437869A
Cited
US3444319A
Cited
US3603967A
Cited
US3735389A
Cited
US3755805A
Cited
US3711849A
Cited
US4150902A
Cited
US4257042A
Cited
US4228510A
Cited
US4298945A
Cited
US4311998A
Cited
US4331995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |