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Selecting Type Size in Matrix Printers

IP.com Disclosure Number: IPCOM000094519D
Original Publication Date: 1965-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Heydkamp, K: AUTHOR

Abstract

In printers which print characters in the form of a dot raster, the individual dots are produced by oscillating print wires or the like. In this arrangement, print wires S1... S11 are assembled in a print head, not shown, in a single vertical row. The individual rows of the dot raster are printed in succession by relative displacement of the print head and paper. The selective operation of wires S1... S11 is effected through storage matrix 10 having a number of cores 11 equal to the number of possible dots in the raster and arranged in columns and rows.

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Selecting Type Size in Matrix Printers

In printers which print characters in the form of a dot raster, the individual dots are produced by oscillating print wires or the like. In this arrangement, print wires S1... S11 are assembled in a print head, not shown, in a single vertical row. The individual rows of the dot raster are printed in succession by relative displacement of the print head and paper. The selective operation of wires S1... S11 is effected through storage matrix 10 having a number of cores 11 equal to the number of possible dots in the raster and arranged in columns and rows.

Each column is threaded by separate conductors X1... X9 connected to read drivers 12. Each row is threaded by conductors Y1... Y11 connected through And' s A1... A11 to operators B1... B11 of wires S1... S11. Conductors Y1, 2, 4, 6, 8, 10 and 11 are also connected to a second set of And's a1... a7 through Or's 01... 07 to operators B1... B7 of wires S1... S7. For reproducing a character, certain cores 11 are threaded by write winding 13 which is connected to write driver 14 having an input from decoder 15 and central processor 16. For illustration only letter P is shown.

For writing a character in matrix 10, winding 13 is pulsed by driver 14 as conductors X1... X11 are addressed and pulsed by drivers 12 under control of clock 17. For readout, the conductors X1... X9 are pulsed by drivers 12 under control of clock 15 in synchronism with the movement of the print head. Where co...