Imaging material providing device

An image forming apparatus for forming an image of an original document, comprising:

• means for exposing a microcapsule sheet to an imaging light bearing the image of the original document to form a latent image thereon corresponding to the image of the original document, the microcapsule sheet having a surface coated with an immense number of pressure rupturable microcapsules, each microcapsule encapsulating therein dye precursor;
• means for producing a developer sheet by providing imaging material particles to a support member;
• means for developing the latent image by applying a pressure to the exposed microcapsule sheet and the developer sheet superposed one on the other to form a visible image on the developer sheet upon reaction of the dye precursor released from the ruptured microcapsules with the imaging material particles;
• and
• means for thermally fixing the visible image on the developer sheet;
• wherein said developer sheet producing means comprises means for carrying imaging material particles charged to a first polarity, the imaging material carrying means having a portion formed of elastic material for holding the imaging material particles;
• means for conveying the support member, the conveying means being disposed apart from the imaging material carrying means with a gap therebetween and being charged to a second polarity opposite to the first polarity so that the imaging material particles may be electrostatically attached onto the support member;
• means for elastically deforming the elastic portion of the carrying means, the imaging material particles being introduced into the gap when the deformed elastic portion is restored;
• and means for generating an electric field in the gap and electrostatically attracting the charged imaging material particles in a direction toward the support member, said imaging material carrying means comprising a brush-shaped roller member having a peripheral surface and an axis rotatable thereabout, a plurality of ciliary members being implanted on the peripheral surface thereof, each of the plurality of ciliary members being formed of elastic material for holding the imaging material particles.

An imaging material providing device comprising:

• means for carrying imaging material particles charged to a first polarity, said imaging material carrying means having a portion formed of elastic material for holding the imaging material particles;
• means for receiving the imaging material particles, the imaging material receiving means being disposed apart from said imaging material carrying means with a gap therebetween and being charged to a second polarity opposite to the first polarity so that the imaging material particles may be electrostatically attached onto said imaging material receiving means, said imaging material receiving means including means for conveying a support member;
• means for elastically deforming the elastic portion of said carrying means, the imaging material particles being introduced into the gap when the deformed elastic portion is restored;
• and
• means for generating an electric field in the gap and electrostatically attracting the charged imaging material particles in a direction toward said imaging material receiving means, said electric field generating means including a plurality of control electrodes arranged at a position between said support member conveying means and said imaging material carrying means, each of the control electrodes having an aperture, image signals being applied to the control electrodes to selectively charge the control electrodes to the second polarity, the charged imaging material particles passing through the apertures of the control electrodes to form a visible image on the support member corresponding to the image signals.