Recording apparatus
AssigneeRicoh Company, Ltd.
InventorKatsuo Sakai
Life of this patent
Estimating the term…
Abstract
A recording apparatus has a donor roller which is driven to rotate at a first peripheral speed and has a layer of uniformly charged fine toner particles, a multistylus recording head for forming a charge pattern on the toner layer, and a transfer roller which is rotated opposite in direction to the donor roller and at a second peripheral speed which is slower than the first peripheral speed. A recording medium is advanced between the donor and transfer rollers at a speed equal to the second peripheral speed, whereby a transferred toner image of increased density is obtained.
Claims16
A recording apparatus comprising:
- a toner carrier which is driven to move along a predetermined path through a transfer region at a first velocity;
- means for forming a toner layer on a surface of said toner carrier, said toner layer being charged to a first polarity and having a predetermined thickness;
- a recording head for selectively recharging said toner layer with a second polarity opposite to said first polarity thereby forming an electrostatic latent image having a desired pattern;
- and
- means for advancing a transfer medium at a second velocity which is slower than said first velocity through a transfer region where said electrostatic latent image is transferred onto said transfer medium with an increase of image density.
A recording apparatus comprising:
- a first roller for carrying toner on a peripheral surface thereof, said first roller being driven to rotate at a first peripheral velocity;
- means for forming a toner layer on said peripheral surface of said first roller, said toner layer being charged to a first polarity and having a predetermined thickness;
- a recording head for selectively recharging said toner layer with a second polarity opposite to said first polarity thereby forming an electrostatic latent image having a desired charge pattern;
- and
- a second roller disposed in parallel with said first roller and driven to rotate in the direction opposite to that of said first roller at a second peripheral velocity which is slower than said first peripheral velocity, whereby a transfer medium is passed between said first and second rollers at said second peripheral velocity thereby transferring said latent image onto said transfer medium with an increase of image density.
A recording apparatus comprising:
- a first roller for carrying toner on a peripheral surface thereof, said first roller being driven to rotate at a first peripheral velocity;
- means for forming a toner layer on said peripheral surface of said first roller, said toner layer being charged to a first polarity and having a predetermined thickness;
- a recording head for selectively recharging said toner layer with a second polarity opposite to said first polarity thereby forming an electrostatic latent image having a desired charge pattern;
- a second roller disposed in parallel with said first roller and driven to rotate in the direction opposite to said first roller at a second peripheral velocity thereby transferring said latent image onto said peripheral surface of said second roller to form a visible image;
- and
- a third roller disposed in parallel with said second roller and driven to rotate in the direction opposite to said second roller at a third peripheral velocity which is slower than said first peripheral velocity, whereby a transfer medium is passed between said second and third rollers thereby transferring said visible image on said second roller onto said transfer medium with an increase of image density.
Dependencies are inferred from the claim text.