公开(公告)号：DE3767120D1

公开(公告)日：1991-02-07

申请号：DE3767120

申请日：1987-10-20

Applicant: IBM

Inventor： HELINSKI EDWARD FRANK ,  ZABLE JACK LOUIS

IPC: B41J9/02 ,  B41J1/20 ,  B41J9/10 ,  B41J9/133 ,  G06K15/08

Abstract: An impact printer for printing both standard pitch and condensed pitch characters iy disclosed which includes print hammer faces (21, 22) which have a single wide section (21s, 22s) for standard pitch characters and a double wide section (21d, 22d) for printing condensed pitch characters. Using this hammer face one obtains the advantage of high speed when printing standard pitch characters and yet one is able to print condensed pitch characters with the same printer. The face of each hammer is divided into two sections. The first section (21s, 21d). The first section (21s) of each hammer face spans the width of two condensed pitch characters. The hammers are divided into two groups. The first group of hammers has the single width section (22s, 24s, 26s) on the top of the hammer face and the second group of hammers has the single width section (21s, 23s, 25s) on the bottom of the hammer face. Hammers in the first and second groups alternate along the print line and the hammers are aligned so that single width section of all the hammer faces are in a straight line.

公开(公告)号：BR8705800A

公开(公告)日：1988-05-31

申请号：BR8705800

申请日：1987-10-30

Applicant: IBM

Inventor： ANDERSON LAWRENCE LEE ,  HELINSKI EDWARD FRANK ,  MEIER JOHANN HANS ,  ZABLE JACK LOUIS

IPC: B41J11/02 ,  B41J9/10 ,  B41J9/48 ,  B41J9/54 ,  B41J11/08 ,  B41F3/54

Abstract: A platen assembly for an impact printer comprises the combination of an impact transducer (28) between the backup plate (23) and the type band (11) of a printer and an impact isolator (29) interposed between the transducer and the type band. The transducer comprises a strip of force sensitive material. The strip extends over a plurality of print positions. Electrode means in contact with the surfaces of the force sensitive material form discrete impact zones aligned with the print hammers. One of the electrode means is a continuous conductive strip on one side of the force sensitive strip. Plural conductive pads on the other side of the strip form the discrete impact zones. The transducer element can be a foil using PVF2 with etched conductive patterns forming the electrodes.

公开(公告)号：IT1148842B

公开(公告)日：1986-12-03

申请号：IT2271480

申请日：1980-06-11

Applicant: IBM

Inventor： HO CHONG LEE ,  RICKENBACH DAVID LOUIS ,  ZABLE JACK LOUIS

IPC: B41J2/28 ,  B41J9/127 ,  B41J9/133 ,  B41J9/38 ,  B41J9/42 ,  B41J9/44 ,  B41J

公开(公告)号：DE2552952A1

公开(公告)日：1976-07-01

申请号：DE2552952

申请日：1975-11-26

Applicant: IBM

Inventor： HELINSKI EDWARD FRANK ,  LEE MO CHONG ,  ZABLE JACK LOUIS

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

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 multi-stage transducers located at spaced positions along the stream. Asymmetry can also be produced using an electromagnetic transducer having a non-uniform gap.