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公开(公告)号：US3877036A
公开(公告)日：1975-04-08
申请号：US37607273
申请日：1973-07-02
Applicant: IBM
Inventor： LOEFFLER KARL HEINZ , WEICHARDT HEINZ HERMANN
CPC classification number: B41J2/09
Abstract: An ink jet printing system in which vernier jet alignment is achieved by positioning an electrode within close proximity to the continuous stream of ink being emitted by the jet and applying a voltage to the electrode so as to create an asymmetrical force field which has a component perpendicular to the ink stream direction and which affects the trajectory of the ink stream. The vernier jet alignment technique reduces the high cost involved in obtaining similar tolerances mechanically and the complexity of electronic alignment after drop formation, and is suitable for either single or multiple jet printer configurations.
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公开(公告)号：DE2431077A1
公开(公告)日：1975-01-23
申请号：DE2431077
申请日：1974-06-28
Applicant: IBM
Inventor： LOEFFLER KARL HEINZ , WEICHARDT HEINZ HERMANN
Abstract: 1432103 Ink jet printers INTERNATIONAL BUSINESS MACHINES CORP 28 May 1974 [2 July 1973] 23666/74 Heading B6F An ink jet printer includes an adjustment electrode 28 for each ink stream, located at a point prior to break-up of the stream into droplets, whereby the alignment of the stream can be accurately adjusted.
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公开(公告)号：DE2555744A1
公开(公告)日：1976-09-23
申请号：DE2555744
申请日：1975-12-11
Applicant: IBM
Inventor： LOEFFLER KARL HEINZ , PFEIFFER HANS CHRISTIAN
IPC: H01J37/09 , H01J37/141 , H01J37/147 , H01J37/30 , H01L21/027 , H01J37/14
Abstract: A shielded magnetic lens and deflection yoke structure for an electron beam column which minimizes aberrations in the lens system caused by winding asymmetry in the field coil, as well as aberrations due to eddy currents created within the magnetic circuit of the lens by interaction with the field of the deflection yoke. The shield includes a polepiece structure for the magnetic electron lens generally comprising a hollow cylinder formed of a plurality of precisely machined magnetic discs stacked concentrically with precisely machined nonmagnetic discs in alternating sequence with the lens coil positioned adjacent the periphery of the cylinder and the deflection yoke positioned within the cylinder or proximate to either end thereof. In one preferred embodiment of the invention the magnetic discs are formed of a nonconductive material such as ferrite and the nonmagnetic discs are formed of alumina.
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