Recording head apparatus and method having pluralities of crossed electrodes

• US 4,785,311 A
• Filed: 01/27/1987
• Issued: 11/15/1988
• Est. Priority Date: 01/30/1986
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Mouri, Akihiro, Kaneko, Shuzo, Toyono, Tsutomu
• Primary Examiner(s): Hartary, Joseph W.
• Application Number:
  US07/007,178
• Time in Patent Office: 658 Days
• Field of Search: 346/140, 346/75, 346/1.1, 346/76 PH, 346/76 R
• US Class Current: 346/140.1
• CPC Class Codes: B41J 2/005 characterised by bringing liquid or particles selectively into contact with a printing material printing by selective application of impact or pressure on a printing or impression-transfer material B41J2/22
• CPC Class Codes: B41J 2/14 Structure thereof only for on-demand ink jet heads

Abstract

Image recording is achieved with the use of a cylindrical recording head in which ink is contained, a plurality of ink passage holes being formed on a circumferential surface thereof. The recording head includes a plurality of scanning electrodes and a plurality of signal electrodes to which an image signal is transmitted. A heating material is disposed around each of the ink passage holes in the area surrounded by the electrodes. In response to the image signal, a certain number of ink passage holes are heated by means of the selected heating materials to which electric current is supplied via the electrodes whereby ink of which viscosity is reduced under the effect of thus generated heat flows to the outside through the ink passage holes until it is transferred onto a recording medium.

Claims

1. A recording head for recording an image on a recording medium by transferring ink onto said recording medium, comprising:

an ink containing portion for containing ink;

a plurality of ink-passing apertures for directing ink contained in said ink containing portion from the inside of said ink containing portion to the outside thereof so as to transfer ink onto said recording medium;

a plurality of non-contacting scanning electrodes provided on an outside surface of said ink containing portion;

a plurality of non-contacting signal electrodes provided on said outside surface of said ink containing portion so as to cross said plurality of scanning electrodes; and

heating means sandwiched between said plurality of scanning electrodes and said plurality of signal electrodes, for heating said ink to cause said ink to pass through said ink-passing apertures.

2. A recording head according to claim 1, wherein said ink containing portion has a cylindrical shape, and wherein said signal electrodes are disposed on said outside surface of said ink containing portion and extend in an axial direction thereof, and further including a single signal contact means for contacting one of said plurality of signal electrodes.

3. A recording head according to claim 1, wherein said ink containing portion has a cylindrical shape, and wherein said scanning electrodes are disposed on said ink containing portion outside surface and extend in an axial direction thereof, and further including a single scanning signal member for contacting one of said plurality of scanning electrodes.

4. A recording head according to claim 1, wherein each of said plurality of ink-passing apertures is disposed at an intersection of one of said scanning electrodes with one of said signal electrodes.

5. A recording head according to claim 1, wherein said ink containing portion has a cylindrical shape, and wherein said scanning electrodes extend axially with respect to said ink containing portion, and wherein said signal electrodes extend circumferentially with rspect to said ink containing portion, and further including:

single scanning brush means for contacting one of said scanning electrodes; and

a plurality of signal brush means for contacting said plurality of signal electrodes.

6. A recording head according to claim 1, wherein said ink comprises heat fusible binder.

7. A recording apparatus for recording an image on a recording medium by transferring ink onto said recording medium, comprising:

a recording head for applying ink to a recording medium, said recording head including;

an ink containing portion for containing the ink;

a plurality of non-contacting first electrodes disposed on an outside surface of said ink containing portion;

a plurality of non-contacting second electrodss provided on the outside surface of said ink containing portion so as to cross said plurality of first electrodes at a plurality of intersection points;

heating means sandwiched between said first and second plurality of electrodes at said intersection points; and

a plurality of ink-passing apertures disposed at said intersection points for passing ink from an inside of said ink containing portion to an outside thereof so as to transfer ink to said recording medium;

first contact means for contacting said first plurality of electrodes;

second contact means for contacting said second plurality of electrodes; and

processing means coupled to said first and second contacting means for energizing said first and second pluralities of electrodes to cause ink to be applied to said recording medium.

8. An apparatus according to claim 7, further including first motor means for driving said recording head, and second motor means for driving said recording medium.

9. An apparatus according to claim 7, wherein said processing means includes:

central processiing means for controlling the energization of said first and second pluralities of electrodes;

memory means for storing recording information used by said central processing means to control said first and second pluralities of electrodes; and

driver means for driving said first and second pluralities of electrodes in accordance with instructions from said central processing means.

10. An apparatus according to claim 7, wherein said ink comprises a heat fusible binder.

11. An apparatus according to claim 7, wherein said ink containing portion has a cylindrical shape, and wherein said first plurality of electrodes extend axially with respect to said ink containing portion, and wherein said second plurality of electrodes extend circumferentially with respect to said ink containing portion.

12. An apparatus according to claim 11, further including a first contacting member for contacting one of said plurality of first electrodes at a time, and a plurality of second contacting members for simultaneously contacting each of said plurality of second electrodes.

13. A method of recording on a recording medium by transferring ink onto said recording medium, comprising the steps of:

providing an ink containing portion of a recording head having ink therein, said ink containing portion having a first plurality of non-contacting electrodes on the outside surface of said ink containing portion;

a second plurality of electrodes on the outside surface of said ink containing portion so as to cross said plurality of first electrodes at a plurality of intersection points;

heating means sandwiched between said first and second pluralitites of electrodes at said plurality of intersection points; and

a plurality of ink-passing apertures at said plurality of intersection points for directing ink contained in said ink containing portion from an inside thereof to an outside thereof to transfer ink onto said recording medium;

positioning said recording head adjacent said recording medium; and

energizing one of said first plurality of electrodes, and at least one of said second plurality of electrodes to cause ink to flow through the aperture located at the intersection point of the energized first and second electrodes.

14. A method according to claim 13, wherein the ink within said ink containing portion includes a heat fusible binder in the ink.

15. A method according to claim 13, further including the step of displacing said recording head relative to said recording medium.

16. A method according to claim 13, wherein said energizing step includes the step of providing heat to the ink disposed at the intersection point of the energized first and second electrodes to cause a viscosity of said ink to be reduced to cause the ink to flow through the corresponding aperture.

17. A method according to claim 13, wherein said ink containing portion includes a cylindrically shaped ink containing portion, and wherein said first plurality of electrodes extends in an axial direction of said ink containing portion, and said second plurality of electrodes extends in a circumferential direction of said ink containing portion.

18. A method according to claim 17, wherein said step of providing an ink containing portion includes the steps of:

positioning a single first contacting member to contact one of said plurality of first electrodes; and

positioning a plurality of second contacting members to contact each of said plurality of second electrodes.

19. A method according to claim 13, further including the steps of:

driving said recording medium with a first motor means; and

driving said ink containing portion with a second motor means.