Incremental printing of symbolic information – Ink jet – Controller
Patent
1995-02-17
1996-10-22
Lund, Valerie A.
Incremental printing of symbolic information
Ink jet
Controller
347 37, B41J 201
Patent
active
055681727
ABSTRACT:
A method for registering printer dots in a printer having separate cartridges or print bars which create dots on paper moving therebeneath. Commands are generated to drive a paper carrier past the cartridges. Machine readable targets on the paper carrier are scanned and a processor uses signals generated by the targets for measuring the distance traveled by the carrier between detection of the first and second marks. The difference between the measured distance and the distance which yields ideal registration is used to delay (or advance) dot firing to improve registration. In another aspect, targets comprising slots oriented transverse to paper movement and at a 45.degree. angle relative to paper movement are photolithographically engraved in nozzle plates. The slots are scanned to produce information about misregistration along an axis in the direction of paper movement and along an axis transverse thereto.
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patent: 4709245 (1987-11-01), Piatt
patent: 4709248 (1987-11-01), Piatt
patent: 4734868 (1988-03-01), DeLacy
patent: 4922270 (1990-05-01), Cobbs et al.
patent: 5289208 (1994-02-01), Haselby
patent: 5350929 (1994-09-01), Meyer et al.
patent: 5404020 (1995-04-01), Cobbs
Hewlett--Packard Company
Lund Valerie A.
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