公开(公告)号：DE2702859A1

公开(公告)日：1977-08-04

申请号：DE2702859

申请日：1977-01-25

Applicant: IBM

Inventor： PENNEBAKER JUN WILLIAM BOONE ,  PENNINGTON KEITH SAMUEL ,  SEITZ HUGO KARL ,  HOCHBERG FREDERICK

IPC: B01D43/00 ,  B01D45/08 ,  B41J2/175 ,  B41J2/195 ,  B41J27/00

Abstract: DYNAMIC REMOVAL OF SOLID IMPURITIES FROM RECIRCULATING INK In an ink jet printer solid impurities contaminating recirculating ink are removed by subjecting contaminated ink to ultrasonic energy for forming an aerosol of the ink. The aerosol of ink is entrained in an air stream and carried to impactor means where the ink aerosol is caused to return to a liquid state.

公开(公告)号：DE2430129A1

公开(公告)日：1975-01-23

申请号：DE2430129

申请日：1974-06-22

Applicant: IBM

Inventor： PENNEBAKER JUN WILLIAM BOONE

IPC: H01J17/49 ,  G11C11/28 ,  G09F9/32

Abstract: A low voltage gas discharge display device wherein individual cells are addressed by three level and four level addressing techniques. In the "off" or standby state, low glow discharge occurs between an anode and a cathode, either or both of which are segmented so that the respective segments are common to groups of cells. In this state, with no pulses present control electrode lines, associated with rows of cells, are quiescently biased negatively to create a current impeding ion sheath across the respective cell holes therethrough to the positively biased collector electrode lines, associated with columns of cells. In a three level address scheme where only the cathode is segmented, the cathode segment containing a particular cell to be addressed is selectively driven negatively by a relatively short, partial-select pulse. During this negative pulse interval, partial-select positive pulses are also simultaneously applied to intersecting control and collector electrode lines including the lines which intersect at the cell to be addressed. In a four level address scheme, the anode is also segmented with the anode segments also being selectively pulse driven. Segmenting of the anode and cathode allows a reduction in the total number of drivers typically required in two level addressing of a given array of cells.