公开(公告)号：CA1156714A

公开(公告)日：1983-11-08

申请号：CA356135

申请日：1980-07-14

Applicant: IBM

Inventor： DENNY CLIFFORD M ,  HUGHES JOHN G ,  WEST DONALD L

IPC: B41J2/01 ,  B41J2/13 ,  B41J19/14 ,  B41J3/04 ,  G01D15/18

Abstract: INERTIAL DEFLECTION FIELD TILTING FOR BI-DIRECTIONAL PRINTING IN INK JET PRINTERS In a continuous type ink jet printer having a conventional charging electrode for charging ink drops in accordance with a signal to be recorded on a record receiving media, a pair of deflection electrodes is mounted in a rocker which pivots on a holder mounted on the carrier. As the carrier is accelerated from the stop condition to print speed, the acceleration of the carrier effects rotation of the rocker about the pivot and thus automatic tilt of the deflection electrodes backward from the direction of carrier movement thereby tilting or inclining the electric field formed between the electrodes to compensate for carrier movement. In the preferred form, a simple magnetic type latch is applied to retain the rocker in one position for printing in a first direction, and to enable quick release and reversal, under inertial control, when the carrier moves in the opposite direction. LE9-79-001

公开(公告)号：CA1010491A

公开(公告)日：1977-05-17

申请号：CA206390

申请日：1974-08-06

Applicant: IBM

Inventor： CARMICHAEL JOHN M ,  WEST DONALD L ,  WILLIAMS ROBERT A

IPC: G01P3/66 ,  B41J2/12 ,  B41J2/125 ,  G01R5/28 ,  G01R29/24 ,  G06K15/10 ,  H04N1/23

Abstract: Circuits are described involving a method of detecting charges on drops in an ink jet stream without contacting the stream. This permits a determination of proper synchronization and charging of the drops, the velocity of the ink stream, the extent of deflection of the drops, and whether or not the stream is in operation, or has stopped.

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.