Platen to print head gap adjustment arrangement

Details Platen to print head gap adjustment arrangement Platen to print head gap adjustment arrangement

1993-01-29

1996-05-21

Hilten, John S.

Typewriting machines

Including adjustment for optimum printing plane

Responsive to thickness of record-medium

400 59, B41J 1120

Patent

active

055183247

ABSTRACT:
A system for automatically adjusting the print head gap of an impact printer, particularly for paper stocks of differing thicknesses and multi-layer forms, provides for measurement of an absolute distance between an undeflected platen position and a home position of the print head. Paper stock thickness is measured by measuring the distance to the home position from a position of the print head when a predetermined force is exerted by the print head against the platen. Since a similar measurement is made when paper stock is not present in the printer and using the same force against the platen, platen flexure is removed as a source of error and a standardized force is available for compression of the paper stock during measurement. Improved accuracy is achieved at high speed while avoiding the use of position encoder/decoder arrangements. A wider range of manufacturing variations in printer geometry and rigidity can be accommodated with uniformly improved print quality.

REFERENCES:
patent: 4652153 (1987-03-01), Kotsuzumi et al.
patent: 4676675 (1987-06-01), Suzuki et al.
patent: 4737645 (1988-04-01), Lahr
patent: 4812059 (1989-03-01), Masaki
patent: 4847638 (1989-07-01), Moriyama
patent: 4881835 (1989-11-01), Niikawaa
patent: 4897670 (1990-01-01), Hasegawa et al.
patent: 4917512 (1990-04-01), Mimura et al.
patent: 4927277 (1990-05-01), Niikawa
patent: 4974974 (1990-12-01), Yoshida et al.
patent: 4990004 (1991-02-01), Kawahara et al.
patent: 5009526 (1991-04-01), Kirchhof
patent: 5037217 (1991-08-01), Suzuki et al.
patent: 5156464 (1992-10-01), Sakai
patent: 5156466 (1992-10-01), Inagaki et al.
patent: 5257867 (1993-11-01), Ito et al.

Affiliated with

Also associated with

Rating

Platen to print head gap adjustment arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Platen to print head gap adjustment arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Platen to print head gap adjustment arrangement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2033529