公开(公告)号：FR2423338A1

公开(公告)日：1979-11-16

申请号：FR7831284

申请日：1978-10-31

Applicant: IBM

Inventor： BOGARDUS E HAL ,  HILDENBRAND WALTER W ,  LEVANONI MENACHEM

IPC: B41J2/075 ,  B41J2/12 ,  B41J3/04

Abstract: An electrostatic lens is disposed between a charge electrode and deflection plates to electrostatically focus each of the droplets on a recording surface at a position in alignment with the nozzle supplying the stream. The lens preferably comprises three electrodes with each of the outer electrodes having the same potential, which is substantially equal to the kinetic energy per unit charge of each of the charged droplets and of opposite polarity to the charge on the droplets, and the third electrode preferably being grounded. Each of the electrodes has a circular aperture through which the charged droplets pass with the electrodes being spaced from each other in the direction of the stream a distance preferably no greater than the diameter of the aperture. If desired, the electrode, which is furthest from the nozzle, can be omitted although this will produce some deceleration of the droplets.

公开(公告)号：CA1001220A

公开(公告)日：1976-12-07

申请号：CA158264

申请日：1972-12-05

Applicant: IBM

Inventor： HILDENBRAND WALTER W ,  LEVINE WILBUR J ,  MANNING STANLEY A ,  STROMS KARL F

IPC: B41J2/045 ,  B41J2/055 ,  B41J2/175 ,  H04N1/034

Abstract: A collapsible ink bag supplies ink at constant pressure through a manifold containing an air bubble trap, capable of venting, which manifold is connected in common to plural lines to a multiple orifice - multiple transducer fluid wave printing head of a recorder. Constant static pressure in the ink supply is provided to avoid inadvertent ejection of ink through orifices of the nozzles. The manifold contains an air bubble and the manifold inlet line has a sufficiently low resistance to flow. Its source of ink supply is free to expand and contract, and the hydraulic resistance to fluid flow in the lines to the head is sufficiently high to eliminate cross talk of waves between separate orifices. Alternatively, a built in reservoir in the head has a single low resistance connection to the source of ink supply and high resistance lines connect it to the orifices.