A method and apparatus is provided for separating the liquid and non-liquid components of a foamy mixture. The apparatus comprises a filter through which the liquid portion of the foam can pass and through which the gaseous or air component cannot pass, unless a pressure differential across the filter exceeds the bubble point of the filter. Foam is supplied to a first side of the filter. The liquid component of the foam is removed from the second side of the filter, and the gaseous component of the foam from the first side of the filter. A pressure differential is established between the two sides of the filter to cause the liquid component of the foam to pass through the filter; but the pressure differential across the filter is prevented from exceeding the bubble point of the filter to prevent the gaseous component of the foam from passing through the filter.
Correcting Stimulation Nonuniformity At The Fluid Cavity Trench End Boundary
In a drop generator for use in an ink jet printer, stimulation transducers are bonded near the ends of the jet array on the droplet generator body. The transducers are electrically controlled with an oscillating voltage signal which can be modified in amplitude and phase with respect to the main driving signal. By altering the drive signal of the end transducers in amplitude and/or phase, the end sections being aligned with the solid end sections of the droplet generator, it is possible to match the vibration of the end sections with the central portion of the droplet generator. The result is more uniform stimulation down the length of the droplet generator.
Method For Fabricating A Charge Plate For An Inkjet Printhead
Brian G. Morris - Dayton OH, US Richard W. Sexton - Bainbridge OH, US Michael F. Baumer - Dayton OH, US
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
B21D 53/76 G01D 15/00
US Classification:
298901, 29594, 29831, 29846, 29847, 216 27
Abstract:
A method for fabricating a charge plate for an ink jet printhead entails removing portions of conductive material from a dimensionally stable dielectric substrate with a coating of conductive material to form at least a first and second electrode on a first face with a first space between the first and second electrodes, removing portions of conductive material from the dimensionally stable dielectric substrate with a coating of conductive material to form a first electrode extension that engages the first electrode on the conductive charging face, and a second electrode extension that engages the second electrode on the conductive charging face, whereby the first and second electrode extensions are electrically isolated from each other, additionally forming a first space between the electrode extensions, which connects with the first space between the electrode extensions.
An ink jet droplet generator body for an ink jet droplet generator comprising an orifice plate with a plurality of nozzles forming a jet array entails a throughbore with an entrance and exit port, the throughbore provides a path through that flows fluid from a fluid supply to the first slot. The first slot connects the throughbore to the orifice plate. One or more holes or a slot are located in the top of the generator body to direct fluid or a secondary source of fluid to the first slot and then the orifice plate.
Method Of Manufacturing A Charge Plate And Orifice Plate For Continuous Ink Jet Printers
A charge plate is fabricated for a continuous ink jet printer print head by applying an etch-stop to one of the opposed sides of an electrically non-conductive substrate. An array of charging channels are etched into the substrate through the etch-stop layer adjacent to predetermined orifice positions. The charging channels are passivated by depositing a dielectric insulator into the charging channels; and electrical leads are formed by coating the passivated charging channels with metal. A second etch-stop layer is applied to the other of the opposed sides of the substrate, and an array of orifices is formed through the orifice plate substrate at the predetermined orifice positions. The orifices extend between the opposed sides.
Michael J. Piatt - Dayton OH, US Michael F. Baumer - Dayton OH, US
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
B41J 2/09
US Classification:
347 77
Abstract:
A liquid ejection apparatus includes a liquid stream generator, an electrode system, and a stream deflector. The liquid stream generator includes a nozzle and is operable to produce a stream of liquid through the nozzle. The electrode system is operable to produce an electric field including a first region having a first magnitude and a second region having a second magnitude. The stream deflector is operable to selectively cause the stream to move into one of the first region and the second region.
Integrated Charge And Orifice Plates For Continuous Ink Jet Printers
Shan Guan - Dublin OH, US Michael F. Baumer - Dayton OH, US Richard W. Sexton - Bainbridge OH, US
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
B41J 2/14 B41J 2/16
US Classification:
347 47, 347 76, 347 77
Abstract:
An integrated orifice array plate and a charge plate are fabricated for a continuous ink jet print head by producing an orifice plate and a charge plate, and by bonding the two together. The orifice plate is produced by providing an electrically non-conductive orifice plate substrate, forming a recessed-surface trench of predetermined depth into one of two opposed sides of the orifice plate substrate, and forming an array of orifices through the orifice plate substrate from the recessed surface of the trench to the other of the two opposed sides wherein the orifices are spaced apart by a predetermined distance. The charge plate is produced by providing an electrically non-conductive orifice plate substrate of predetermined thickness, and forming a plurality of charging leads on one of two opposed sides of the orifice plate substrate. The charge leads are spaced apart by said predetermined distance.
Method Of Manufacturing An Integrated Orifice Plate And Electroformed Charge Plate
Shan Guan - Dublin OH, US Michael F. Baumer - Dayton OH, US Richard W. Sexton - Bainbridge OH, US
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
B21D 53/76 H01L 21/441
US Classification:
298901, 29846, 347 63, 347 65, 205122, 216 27
Abstract:
An integrated orifice array plate and a charge plate is fabricated for a continuous ink jet print head by providing an electrically non-conductive orifice plate substrate having first and second opposed sides and an array of predetermined spaced-apart orifice positions. A plating seed layer is applied to the first of the opposed sides of the substrate, and an array of orifices is formed through the orifice plate substrate at the predetermined orifice positions. The orifices extend between the opposed sides. The plating seed layer is etched, leaving a portion of the plating seed layer adjacent to each of the predetermined orifice positions. A charge electrode is plated onto each of the portions of the plating seed layer.