Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including endless-band carrier for type-faces
Patent
1986-09-08
1988-08-16
Pieprz, William
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Including endless-band carrier for type-faces
101 9314, 364519, B41J 120
Patent
active
047640391
ABSTRACT:
Method for controlling line printers comprising a revolving type band (400) and a print hammer bank for precalculating the firing times of the print hammers.
The type band generally comprises equidistantly spaced scannable time marks (402) and a reference mark (501).
The character spacing on the type band is subject to a coarse raster pitch .DELTA.T which is derived from the time mark pitch.
The time mark positions are associated with coarse raster positions.
The arrangement of the print hammers is subject to a coarse raster pitch .DELTA.T and a fine raster pitch .DELTA.T. Coarse and fine raster values are defined as time values.
The hammers are sorted according to the fine raster values and their firing times are calculated by means of a special algorithm according to the order resulting from the sort step. The calculated values are entered in a first table (600) (comprising a field for each coarse raster value) and in a second table (700) (in which the fine raster values associated with the coarse raster value are entered).
The printer control method permits
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patent: 4457229 (1984-07-01), Carrington et al.
patent: 4597328 (1986-07-01), Carrington et al.
patent: 4621343 (1986-11-01), Fujieda et al.
Gasper John S.
International Business Machines - Corporation
Pieprz William
LandOfFree
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