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 Title: |
US4688049:
Continuous ink jet printing
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Doyle, James J.; Cambridge, United Kingdom
Lecheheb, Ammar; Newmarket, United Kingdom
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| Assignee: |
Domino Printing Sciences PLC, Cambridge, United Kingdom
other patents from DOMINO PRINTING SCIENCES PLC (151595) (approx. 40)
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| Published / Filed: |
1987-08-18
/ 1986-06-10
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| Application Number: |
US1986000872288
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| IPC Code: |
Advanced:
B41J 2/075;
B41J 2/08;
Core:
more...
IPC-7:
G01D 15/18;
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| U.S. Class: |
Current:
347/076;
346/002;
347/004;
Original:
346/001.1;
346/075;
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| Field of Search: |
346/1.1,75
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| Priority Number: |
| 1985-06-11 |
GB1985000014751 |
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| Abstract: |
In a continuous ink jet printing method for printing multiple lines of print (13-15), raster of drops is produced in which the differential charge between drops printed on opposite sides of an interline gap (17,18) is increased in comparison with that between adjacent drops to be printed within a line (13-15). At the same time the number of guard drops is maintained the same or is reduced between the printable drops immediately adjacent to the interline gap, so that the distance between printed drops immediately adjacent to the interline gap is increased without increasing the number of drops in the raster.
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| Attorney, Agent or Firm: |
Robbins & Laramie ;
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| Primary / Asst. Examiners: |
Goldberg, E. A.; Preston, Gerald E.
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| Maintenance Status: |
E3 Expired Check current status
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| INPADOC Legal Status: |
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| Designated Country: |
AT BE CH DE FR GB IT LI LU NL SE
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| Family: |
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First Claim:
Show all 6 claims |
We claim:
1. A continuous ink jet printing method in which a continuous stream of droplets is produced and a raster comprising a regular number of droplets is used to print each of a plurality of columns in a matrix to define individual characters, each raster comprising a number of printable drops and a number of non-printable guard drops interspaced between said printable drops, the number of said printable drops which are actually printed being varied appropriately for each column of each of said character, said method being adapted for printing multiple lines of characters, wherein the step of producing each said raster includes the steps of:
- increasing the differential charge between drops printed on opposite sides of each interline gap in comparison with that between adjacent drops to be printed within a line; and,
- maintaining the number of guard drops at most the same between said printable drops immediately adjacent to each said interline gap;
- whereby the distance between printed drops immediately adjacent to each said interline gap is increased without increasing the number of drops in said raster.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 9 U.S. patent(s) that reference this one
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