公开(公告)号：US3928855A

公开(公告)日：1975-12-23

申请号：US53391374

申请日：1974-12-18

Applicant: IBM

Inventor： HELINSKI EDWARD F ,  LEE HO C ,  ZABLE JACK L

IPC: B41J2/075 ,  B41J2/12 ,  G06K15/10 ,  H04N1/034 ,  G01D15/18

CPC classification number: B41J2/12

Abstract: A continuous jet stream of a ferrofluid ink is broken into individual drops by an asymmetrical perturbation force applied to the stream. The ink, as it exits from an orifice under pressure, is excited by an electromagnetic transducer energized with an asymmetrical excitation signal having a fundamental and higher harmonics. An asymmetrical excitation signal, such as a sawtooth, having a substantial second and/or third harmonics content which produce an excitation signal with different rise and fall times can form a stream of drops free of satellites. Asymmetry of magnetic field forces can be produced with single stage or multistage transducers located at spaced positions along the stream. Asymmetry can also be produced using an electromagnetic transducer having a non-uniform gap.

Abstract translation: 通过施加到流的不对称扰动力将铁磁流体油墨的连续喷射流分解成单独的液滴。 油墨在压力下从孔口排出时，被具有基波和高次谐波的非对称激励信号激励的电磁换能器激发。 具有实质上的第二和/或第三谐波内容的不对称激励信号，例如锯齿波产生具有不同上升和下降时间的激励信号，可以形成不含卫星的液滴流。 可以通过沿着流的间隔位置的单级或多级换能器产生磁场力的不对称性。 也可以使用具有不均匀间隙的电磁换能器来产生不对称性。

公开(公告)号：CA1139004A

公开(公告)日：1983-01-04

申请号：CA352816

申请日：1980-05-27

Applicant: IBM

Inventor： LEE HO C ,  RICKENBACH DAVID H ,  ZABLE JACK L

IPC: B41J2/28 ,  B41J9/127 ,  B41J9/133 ,  B41J9/38 ,  B41J9/42 ,  B41J9/44 ,  G06K15/02

Abstract: ELECTRO-MAGNETIC PRINT HAMMER An electro-magnetic print hammer comprises a single magnetic hammer element in which an impact mass is coupled to a pivotted armature by flexible stem. The hammer-stem has (N+1/2) periods of oscillation at its resonant frequency during the free flight time of the hammer mass. A permanent magnet with a strong magnetic force which decays rapidly with distance holds the hammer element fixed upon motion of the armature until the armature torque exceeds the magnet holding force to cause -the hammer mass to break loose with a snap action. Stop means prevents armature impacts with the operating pole piece of a stator core. The visco-elasticity of the armature stop matches the rebound characteristics of the print medium when impacted by the hammer mass.

公开(公告)号：CA1186944A

公开(公告)日：1985-05-14

申请号：CA414914

申请日：1982-11-04

Applicant: IBM

Inventor： LEE HO C ,  RICKENBACH DAVID H ,  WOLFERT GERHARD A ,  ZABLE JACK L

IPC: B41J9/127 ,  B41J9/38 ,  H01F7/08

Abstract: ELECTROMAGNETIC PRINT HAMMER COIL ASSEMBLY A heat exchange system for an electromagnetically operated print hammer of a print hammer bank provides internal and external heat transfer for the operating windings. A non-magnetic metal bobbin of the heat exchange system provides conductive transfer of heat from the interior of the operating winding to the magnetic core. Flat parallel plates of magnetic material are attached to the sides of the operating winding for external heat transfer and magnetic flux shielding. The plates may have multiple laminations having different saturation and permeability characteristics.

公开(公告)号：CA1236339A

公开(公告)日：1988-05-10

申请号：CA480610

申请日：1985-05-02

Applicant: IBM

Inventor： HELINSKI EDWARD F ,  LEE HO C

IPC: B41J9/127 ,  B41J9/42 ,  B41J9/00

Abstract: Damping apparatus within an actuator device in which a backstop is supported on one portion of a dual cantilever to match the movement of the impacting actuator to reduce wear and provide positive restoration of initial position, wherein the backstop-supporting cantilever portion is embedded in energy-absorbing elastomeric material that is symmetrically confined to shorten settling time of the actuator and remain unaffected by temperature changes.

公开(公告)号：CA1033403A

公开(公告)日：1978-06-20

申请号：CA225803

申请日：1975-04-23

Applicant: IBM

Inventor： CHEN WINSTON H ,  LEE HO C

IPC: B41J2/205 ,  B41J2/21 ,  G06K15/10 ,  H04N1/23

Abstract: Method of recording with a stream of marking fluid drops in which a predetermined plurality of successively formed drops in a stream each have the same electrical charge induced therein so that, when subsequently subjected to an electrostatic field, all drops of one commonly charged plurality will impact a record member at approximately the same spot. Drop charges are induced therein by asynchronously applied charging signal levels, each having a duration which is a function of the drop formation frequency and equal to at least two drop periods.

公开(公告)号：CA1056439A

公开(公告)日：1979-06-12

申请号：CA238098

申请日：1975-10-20

Applicant: IBM

Inventor： HELINSKI EDWARD F ,  LEE HO C ,  ZABLE JACK L

IPC: B41J2/075 ,  B41J2/12 ,  G06K15/10 ,  H04N1/034 ,  B41J3/04

Abstract: METHOD AND APPARATUS FOR CONTROLLING SATELLITES IN AN INK JET PRINTING SYSTEM A continuous jet stream of a ferrofluid ink is broken into individual drops by an asymmetrical perturbation force applied to the stream. The ink, as it exits from an orifice under pressure, is excited by an electromagnetic transducer energized with an asymmetrical excitation signal having a fundamental and higher harmonics. An asymmetrical excitation signal, such as a sawtooth, having a substantial second and/or third harmonics content which produce an excitation signal with different rise and fall times can form a stream of drops free of satellites. Asymmetry of magnetic field forces can be produced with single stage or multi-stage transducers located at spaced positions along the stream. Asymmetry can also be produced using an electromagnetic transducer having a non-uniform gap.

公开(公告)号：FR2372031A1

公开(公告)日：1978-06-23

申请号：FR7731533

申请日：1977-10-07

Applicant: IBM

Inventor： LEE HO C

IPC: B41J2/085 ,  B41J2/09 ,  B41J3/04 ,  B41J27/18

公开(公告)号：CA1084099A

公开(公告)日：1980-08-19

申请号：CA269172

申请日：1977-01-05

Applicant: IBM

Inventor： JENSEN DONALD F ,  LEE HO C ,  TAMULIS JOHN C

IPC: G01D15/16 ,  B41J3/04

Abstract: MULTI-NOZZLE INK JET PRINTER AND METHOD OF PRINTING A line printer has a print head with plural nozzles arranged in a single row generally transverse to the direction of relative motion of the print head and a print medium. The nozzles are spaced plural dot positions from each other corresponding to a plural dot segment of a single dot matrix character stroke. When the row of nozzles is slanted relative to the direction of motion, drops from the nozzles are used to print stroke segments in plural character strokes simultaneously.

公开(公告)号：CA1082289A

公开(公告)日：1980-07-22

申请号：CA287499

申请日：1977-09-26

Applicant: IBM

Inventor： LEE HO C

IPC: B41J2/085 ,  B41J2/09 ,  B41J3/04 ,  G01D15/16

Abstract: MAGNETIC DEFLECTOR FOR A MAGNETIC INK JET PRINTER A magnetic deflector for a magnetic ink jet printer has compensating pole pieces which alter the gradient field produced by deflection pole pieces so as to counterbalance centering forces acting on magnetic ink drops moving through the magnetic field in off center locations. The compensating pole pieces are preferably passive and extend from the zero potential region of the magnetic circuit of the deflection pole pieces.

公开(公告)号：DD130812A5

公开(公告)日：1978-05-03

申请号：DD19676676

申请日：1976-12-30

Applicant: IBM

Inventor： JENSEN DONALD F ,  LEE HO C ,  TAMULIS JOHN C

IPC: B41J2/075 ,  B41J2/10 ,  G06K3/00

Abstract: A line printer has a print head with plural nozzles arranged in a single row generally transverse to the direction of relative motion of the print head and a print medium. The nozzles are spaced plural dot positions from each other corresponding to a plural dot segment of a single dot matrix character stroke. When the row of nozzles is slanted relative to the direction of motion, drops from the nozzles are used to print stroke segments in plural character strokes simultaneously.