Recording head for forming images with charged particles
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsShigeru Kagayama, Tetsuya Kitamura
Life of this patent
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Abstract
A film 33 is adhered using an adhesive layer 32 to the lower surface of an insulation sheet 31 that contacts the peripheral surface of atoner bearing roller. Apertures 34 are formed through the insulation sheet 31, the adhesive layer 32 and the film 33. An indentation portion 37 is formed around each aperture 34 in an upper surface 39 of the insulation sheet 31. Because the insulation sheet 31 and the film 33 are not attached into an integral unit using baking, the resultant member will not warp by differences in thermal expansion of the insulation sheet 31 and the film 33, as would occur if the two were baked together. Because the film 33 is extremely hard and smooth, toner will not pierce into the film 33 .
Claims23
A recording head for forming images with charged particles, comprising:
- an insulation member having a first surface and a second surface on opposite sides thereof, and formed with through holes penetrating from the first surface to the second surface, the insulation m member being adapted to receive supply of charged particles from the first surface;
- electrodes disposed one near each through hole, on one of the first surface and the second surface of the insulation member;
- a film being adhered to the first surface of the insulation member at least around each through hole;
- and
- an adhesive layer interposed between the insulation member and the film, and adhering the film and the insulation member together.
An image forming device for forming images with charged particles, comprising:
- a charged particle supply unit that supplies the charged particles;
- a medium support that supports a medium for receiving the charged particles;
- and
- a recording head interposed between the charged particle supply unit and the medium support, and including:
- an insulation member having a first surface and a second surface on opposite sides thereof, the first surface confronting the charged particle supply unit, the second surface confronting the medium support, the insulation member being formed with through holes penetrating from the first surface to the second surface;
- electrodes disposed one near each through hole, on one of the first surface and the second surface of the insulation member;
- and
- film having properties that prevent clinging of charged particles thereto, the film being adhered to the first surface of the insulation member at least around each through hole;
- and
- an adhesive layer interposed between the insulation member and the film, and adhering the film and the insulation member together.
A recording head as claimed in 14, wherein the film has it resistance of 1016 ohms or less and the insulation member has a resistance of greater than 1015 ohms.
A method of producing a recording head, including the steps of:
- preparing a film having properties that prevent clinging of charged particles thereto;
- and
- adhering the film, using an adhesive, to at least certain portions on one surface of an insulation member, the insulation member being adapted to receive supply of charged particles from the one surface.
Dependencies are inferred from the claim text.