Typewriting machines – For line-spacing by incremental rotation of platen – By irregular increments of platen rotation
Patent
1996-12-20
1998-07-14
Burr, Edgar S.
Typewriting machines
For line-spacing by incremental rotation of platen
By irregular increments of platen rotation
40012404, 400568, 347 41, B41J 1996
Patent
active
057793778
ABSTRACT:
A printing apparatus comprises: a print head comprising an array having an N (N=positive integer) number of dot forming elements arrayed at fixed pitches having a lower end and an upper end; a horizontal scan driver for moving the print head above and along a print medium in a horizontal scan direction; a vertical scan driver for moving the print medium in a vertical scan direction perpendicular to the horizontal scan direction, wherein a vertical scan distance that the print medium is vertically moved when the vertical scan driver is driven one time is selected such that the position of at least one dot forming element, counted from the lower end of the array of the print head in the drive of a horizontal scan is coincident with the position at least one dot forming element, counted from the upper end of the array of the print head in the drive of the horizontal scan drive after a given number of horizontal scan drives; and a head driver for performing a printing operation by intermittently driving the dot forming element located at the coincident positions, counted from the upper or lower end of the array.
REFERENCES:
patent: 4198642 (1980-04-01), Gamblin
patent: 4401991 (1983-08-01), Martin
patent: 4737041 (1988-04-01), Nakayama
patent: 4743127 (1988-05-01), Uematsu
patent: 4887094 (1989-12-01), Izumi et al.
patent: 4999646 (1991-03-01), Trask
patent: 5297871 (1994-03-01), Fujioka
patent: 5300950 (1994-04-01), Lopez
patent: 5429441 (1995-07-01), Schulz et al.
patent: 5625389 (1997-04-01), Eriksen
patent: 5686944 (1997-11-01), Takagi
patent: 5717447 (1998-02-01), Fujimoto
Fujioka Satoshi
Kumai Eiji
Takagi Akira
Burr Edgar S.
Kelley Steven S.
Seiko Epson Corporation
LandOfFree
Printing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Printing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Printing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1875622