公开(公告)号：CA973923A

公开(公告)日：1975-09-02

申请号：CA178369

申请日：1973-08-08

Applicant: IBM

Inventor： DENNY CLIFFORD M ,  NAYLOR HUGH E III ,  WILLIAMS THOMAS H

公开(公告)号：CA1004722A

公开(公告)日：1977-02-01

申请号：CA170049

申请日：1973-04-24

Applicant: IBM

Inventor： HILL JAMES D ,  NAYLOR HUGH E III ,  WEST DONALD L

IPC: B41J2/115 ,  B41J2/12 ,  B41J2/185 ,  G06K15/10 ,  H04N1/23

Abstract: 1405197 Ink drop printers INTERNATIONAL BUSINESS MACHINES CORP 14 May 1973 [27 June 1972] 22760/73 Heading G4H An ink-drop printer 1-30 comprises means 37-57 for detecting failure in synchronisation between drop charging and drop formation. Test signals 41-43, 81 or 65 (ramp or pulse signals, Fig. 3, not shown) are applied to the charge electrode 18 so as to cause otherwise uncharged drops to be deflected into a gutter 35 or 36; the synchronization may be effected line-by-line (e.g. in the home position for each line), between characters or within the matrix boundaries of individual characters. Each gutter contains a sensor which translates charge into current level; the use of gutter 35 produces current levels smaller than those normally encountered during printing, whereas the levels obtainable from gutter 36 are higher since a greater potential is required to deflect the drops thereto (this can also detect lack of potential 25 on deflecting plate 22). The resulting signal A or B is changed to a voltage level and fed with a reference 55 to a comparator 57, the resulting difference signal being used to adjust the timing of drop separation in a piezo-electric crystal driver 15 relative to the signals applied to charge electrode 18. Another embodiment similar to that of Fig. 1 is described with reference to Fig 2 (not shown). Co-pending Application No. 41107/73 describes a similar system for a plurality of ink streams.

公开(公告)号：CA978583A

公开(公告)日：1975-11-25

申请号：CA178367

申请日：1973-08-08

Applicant: IBM

Inventor： HILL JAMES D ,  NAYLOR HUGH E III ,  WEST DONALD L ,  WILLIAMS THOMAS H

IPC: B41J2/075 ,  B05B5/025 ,  B41J2/08 ,  G06K15/10

Abstract: 1385137 Printers INTERNATIONAL BUSINESS MACHINES CORP 4 Sept 1973 [13 Oct 1972] 41513/73 Heading G4H In an ink drop printer, one or more of a predefined sequence of ink-drop-deflection signals can be skipped through to speed up printing. After a shift register has been loaded via another shift register with a bit sequence for a given column of a character dot matrix, from a character generator, the bit sequence is shifted out, each "1" bit gating a slow clock train to a counter and permitting a D/A converter fed by the counter to control charging of a respective ink drop which is then deflected by a constant field by an amount dependent on the charge and therefore count. Each "0" bit zeroes the D/A converter output (so that the ink drop is caught in a gutter rather than deflected on to the paper) and gates a fast clock train to the counter so that the count position not required for printing is skipped through fast. To reduce ink spatter &c.' two or more sweeps down each column are made, with adjacent drops being deposited in different sweeps. A staircase generator may replace the counter and D/A converter.

公开(公告)号：CA972027A

公开(公告)日：1975-07-29

申请号：CA178339

申请日：1973-08-08

Applicant: IBM

Inventor： NAYLOR HUGH E III

IPC: B41J2/115 ,  H04N1/034

公开(公告)号：CA1000347A

公开(公告)日：1976-11-23

申请号：CA206755

申请日：1974-08-09

Applicant: IBM

Inventor： NAYLOR HUGH E III ,  WILLIAMS ROBERT A

IPC: B41J2/125 ,  G06K15/10 ,  H04N1/034

Abstract: 1434470 Electro-physical measurementposition INTERNATIONAL BUSINESS MACHINES CORP 29 July 1974 [17 Aug 1973] 33368/74 Heading G1N The invention relates to the form of electrodes used for sensing the position of electrostatically deflected charged ink-drops in an ink-jet-printer, as described in Specification 1408657, where in Fig. 4 (not shown) thereof a pair of electrodes are mounted above and below the flight path, and connected to a differential amplifying system. In the present Specification several arrangements are illustrated Figs. 2-17b (mostly not shown):- (i) the electrodes may extend along the flight path for six drop spacings and be inclined thereto Fig. 4b (flight towards viewer), (ii) Fig. 6b they may be U-shaped surrounding the flight path, (and may have electrostatic shields Fig. 7 (not shown), (iii) Fig. 10 the spacing may be staggered, (iv) They may be tapered e.g. as in Fig. 13 providing an unsymmetrical pulse, (v) One of the electrodes may be combined with the down-stream electrode (e.g. the sync sensor) to determine the velocity as described in Specification 1408657, Fig. 16 (not shown), (v) Horizontal and vertical sensor electrode pairs may be provided Figs. 17 (not shown).

公开(公告)号：CA974294A

公开(公告)日：1975-09-09

申请号：CA178368

申请日：1973-08-08

Applicant: IBM

Inventor： FILLMORE GARY L ,  NAYLOR HUGH E III ,  WEST DONALD L