Method and apparatus for printing images on a stack of recording sheets using pressure
AssigneeSeiko Epson Corporation
InventorsYusuke Sakagami, Kunihiro Inoue, Tadashi Shimizu, Tetsushi Takahashi, Tadaaki Hagata, Kazuhiko Sato
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Abstract
In a magnetic printing apparatus wherein a demagnetizer 2 as a latent image eraser, a magnetic head 3 constituting a latent image former, a developer 4, a transfer roller 5, a fixer 6, and a cleaner 7 are disposed in this order around a latent image carrier 1, a recording paper 15 including a stack of plural sheets of carbonless paper is fed, transported, and discharged, a single-component dry toner 8 is used, and pressure transfer is made by a transfer roller 5 at a load per unit roller length of 5 kgf/cm or more, thereby achieving printing and copying.
Claims37
A printing method used for a printing apparatus having a latent image carrier, comprising the steps of:
- erasing an exiting latent image from said
- forming a latent image on said carrier,
- developing said latent image on said carrier,
- transferring said latent image onto a stack of at least two sheets of pressure-sensitive paper being fed and transported through said printing apparatus and discharged therefrom, so that said latent image copies onto a lowest said recording paper of said stack, and
- fixing said latent image transferred onto said stack.
A printing method used for a printing apparatus having a latent image carrier, comprising the steps of:
- erasing an existing latent image from said carrier,
- forming a latent image on said carrier using a toner,
- developing said latent image on said carrier,
- transferring said latent image onto a stack of plural sheets of pressure-sensitive paper, which develops a color image by a reaction of a color developer with a dye in microcapsules in the sheets, being fed and transported through said printing apparatus and discharged therefrom, so that said latent image copies onto a lowest of said sheets of said stack, and
- fixing said latent image transferred onto said stack,
- said toner having a greater compressive strength than that of the microcapsules .
A printing apparatus comprising a latent image carrier, a latent image eraser for erasing a latent image on said latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a transfer roller for transferring the image on said latent image carrier to copyable recording paper comprising a stack of plural sheets sensitive to a pressure so that the image is copied onto all of said sheets, a fixer for fixing the image on the recording paper, and a cleaner for removing said toner remaining on said latent image carrier after pressure transfer, characterized by a relation of t/4.ltoreq.d.ltoreq.t+a, wherein d is a clearance between said latent image carrier and said transfer roller, t is a total thickness of the recording paper, and a is a height of said toner on said latent image carrier, and the recording paper being passed through a clearance between said latent image carrier and said transfer roller.
A printing apparatus comprising a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a transfer roller for transferring the image on said latent image carrier to copyable recording paper comprising a stack of plural sheets sensitive to a pressure so that the image is copied onto all of said sheets, two pressure rollers for pressurizing the recording paper after transfer, a fixer for fixing the image on the recording paper, and a cleaner for removing said toner remaining on said latent image carrier after pressure transfer, characterized by a relation of t/4.ltoreq.d.ltoreq.t+a, wherein d is a clearance between said two pressure rollers, t is a total thickness of the recording paper, and a is a height of said toner on said recording paper, and the recording paper being passed through a clearance between said latent image carrier and said transfer roller and a clearance between said two pressure rollers.
A printing apparatus comprising a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a first transfer roller for transferring the image on said latent image carrier to itself, and a second transfer roller for pressure transferring the image on said first transfer roller to copyable recording paper comprising a stack of plural sheets sensitive to a pressure, a fixer for fixing the image on the recording paper, and a cleaner for removing said toner remaining on said latent image carrier after pressure transfer, characterized by a relation of t/4.ltoreq.d.ltoreq.t+a, wherein d is a clearance between said first and second transfer rollers, t is a total thickness of the recording paper, and a is a height of said toner on said first transfer roller, and the recording paper being passed through a clearance between said first and second transfer rollers.
A printing apparatus comprising a latent image carrier, a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a transfer roller for pressurizing a recording paper between said roller and said latent image carrier so that the image on said latent image carrier is pressure transferred to said recording paper comprising a stack of plural sheets sensitive to a pressure, a fixer for fixing the image on the recording paper, and a cleaner for removing the toner remaining on the latent image carrier after pressure transfer, said transfer roller being formed of a rubber material having a rubber hardness of 30 to 80.
A printing apparatus comprising a latent image carrier, a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a transfer roller for pressurizing a recording paper between said roller and said latent image carrier so that the image on said latent image carrier is pressure transferred to the recording paper comprising a stack of plural sheets sensitive to a pressure, a fixer for fixing the image on the recording paper, and a cleaner for removing the toner remaining on the latent image carrier after pressure transfer, said transfer roller comprising a rigid roller and an elastic layer, and rigid particles with an average particle diameter of 5 to 70 .mu.m being dispersed in said toner.
A printing apparatus comprising a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a transfer roller for transferring the image on said latent image carrier to copyable recording paper comprising a stack of plural sheets sensitive to a pressure, two pressure rollers for pressurizing the recording paper after transfer, a fixer for fixing the image on the recording paper, and a cleaner for removing said toner remaining on said latent image carrier after pressure transfer, characterized in that one of said pressure rollers is formed of a rubber material having a rubber hardness of 30 to 80.
A printing apparatus comprising a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a transfer roller for transferring the image on said latent image carrier to copyable recording paper comprising a stack of plural sheets sensitive to a pressure, two pressure rollers for pressurizing the recording paper after transfer, a fixer for fixing the image on the recording paper, and a cleaner for removing said toner remaining on said latent image carrier after pressure transfer, characterized in that one of said pressure rollers comprises a rigid roller and an elastic layer, and rigid particles with an average particle diameter of 5 to 70 .mu.m are dispersed in said toner.
A printing apparatus comprising a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a first transfer roller for transferring the image on said latent image carrier to itself, and a second transfer roller for pressurizing a recording paper between said second transfer roller and said first transfer roller so that the image on said latent image carrier is pressure transferred to the copyable recording paper comprising a stack of plural sheets sensitive to a pressure, a fixer for fixing the image on the recording paper, and a cleaner for removing the toner remaining on the latent image carrier after pressure transfer, one of said first transfer roller and said second transfer roller being formed of a rubber material having a rubber hardness of 30 to 80.
A printing apparatus comprising a latent image eraser for erasing a latent image on a latent image carrier, a latent image former for forming a latent image on said latent image carrier, a developer for developing the latent image on said latent image carrier to an image by an aggregate of toners, a first transfer roller for transferring the image on said latent image carrier to itself, and a second transfer roller for pressurizing a recording paper between said second transfer roller and said first transfer roller so that the image on said latent image carrier is pressure transferred to the copyable recording paper comprising a stack of plural sheets sensitive to a pressure, a fixer for fixing the image on the recording paper, and a cleaner for removing the toner remaining on the latent image carrier after pressure transfer, one of said first and second transfer rollers comprising a rigid roller and an elastic layer, and rigid particles with an average particle diameter of 5 to 70 .mu.m being dispersed in said toner.
Dependencies are inferred from the claim text.