Typewriting machines – For line-spacing by incremental rotation of platen – By electric-power drive
Patent
1991-11-29
1994-03-29
Burr, Edgar S.
Typewriting machines
For line-spacing by incremental rotation of platen
By electric-power drive
400636, 4007071, 400582, B41J 1992
Patent
active
052978710
ABSTRACT:
A vertical forms control apparatus for a printer, and a printing method, which corrects dot pitch errors in the subscanning direction. A paper feeding control apparatus is provided with a print head scanned in a direction of paper width and having a plurality (N) of dot forming elements aligned with a dot pitch (P) in a direction in which the paper is advanced, a pulse motor connected to a paper advancing mechanism via a transmission such that the pulse motor requires a plurality of steps to make a rotation corresponding to the dot pitch (P), and a microcomputer for outputting drive pulses to the pulse motor 1, the drive pulses indicating the number-of-steps-for-an-advancement-of-one-line (P.times.N) plus correction steps. In printing across a plurality of lines with the lines connected together, if blank spaces or overlaps are developed, pulses in a number required for rotating the pulse motor in an amount corresponding to the width of the blank spaces or overlaps are added to or subtracted from a standard value so that the pulse motor undergoes a correct amount of rotation for each line. By this arrangement, errors between lines due to machining errors of parts can be corrected so that image data formed of a plurality of lines can be printed with a high quality with no blank spaces and overlaps.
REFERENCES:
patent: 4195940 (1980-04-01), Rekewitz
patent: 4533269 (1985-08-01), Pou et al.
patent: 4737924 (1988-04-01), Miki
patent: 4780012 (1988-10-01), Kikuchi
IBM Technical Disclosure Bulletin--vol. 22, No. 8A, Jan., 1980 "Self-Correcting Forms Movement System"--E. T. Brown and B. R. Cavill.
Bennett Christopher A.
Burr Edgar S.
Seiko Epson Corporation
LandOfFree
Paper feeding control apparatus and method for printers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Paper feeding control apparatus and method for printers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Paper feeding control apparatus and method for printers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-787251