Typewriting machines – Including interposed inking device for record-medium – Ribbon-feeding mechanism
Patent
1985-05-23
1986-10-28
Pieprz, William
Typewriting machines
Including interposed inking device for record-medium
Ribbon-feeding mechanism
400229, 400232, B41J 3314, B41J 3336
Patent
active
046195378
ABSTRACT:
Where the ribbon advance mechanism of a printer is driven by the motion of the print head carrier, ink in the ribbon will be differentially depleted depending upon the density of print. This varied depletion becomes a problem for printers capable of printing high density graphics images, particularly color filled images. In accordance with this invention, the printing density is monitored and when the printing density exceeds a predetermined value, the print head is caused to be moved an amount greater than that necessary to position the print head at a succeeding print position so as to thereby cause additional ink ribbon to be advanced and to avoid overprinting on areas of the ribbon where high density printing has occurred.
REFERENCES:
patent: 4530612 (1985-07-01), Butera et al.
Evans et al, "Variable Ribbon Incrementation", IBM Technical Disclosure Bulletin, vol. 22, No. 8B, p. 3484, 1/80.
Loeffler, "Ribbon Control . . . ", IBM Technical Disclosure Bulletin, vol. 21, No. 5, pp. 1998-1999, 10/78.
Do Phuc K.
Hedrick Dennis R.
Kendrick, Jr. Barnes R.
Troupes Demetrios
Wyke Carol E.
International Business Machines - Corporation
Pieprz William
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