Back to results
US 4,742,374 AGranted
Copying apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsTakemi Yamamoto, Ryohei Komiya, Naoyuki Hatta
Life of this patent
Estimating the term…
Abstract
A copying apparatus including an image-illuminating device for illuminating a surface of an original having images to be reproduced, so that a light produced by the image-illuminating device is reflected by the image-bearing surface of the original. The reflected light includes rays to which a photosensitive paper is sensitive. Latent images are formed on the photosensitive paper by means of selective exposure of local portions of the photosensitive paper to the rays of the reflected light from the image-bearing surface of the original.
Claims17
A copying appartus comprising:
- a photosensitive paper;
- an image-illuminating device for illuminating a surface of an original having images to be reproduced, said image-illuminating device producing a light which is reflected by said surface of the original, the reflected light including rays to which said photosensitive paper is sensitive, whereby latent images are formed on said photosensitive paper by means of selective local exposure of the photosensitive paper to said rays;
- and
- an auxiliary illuminating device for re-exposing said photosensitive paper after said latent images are developed into visible images.
1 more element
A copying apparatus operable with an original having an image-bearing surface on which images to be reproduced are supported, comprising:
- an image-illuminating device operable to produce a light for illuminating said image-bearing surface of the original;
- a photosensitive paper of a self-activated type disposed in facing relation with said image-bearing surface of the original, said photosensitive paper being sensitive to rays of a wavelength included in the light reflected by said image-bearing surface;
- an optical system for focusing said reflected light on a surface of said photosensitive paper, to expose local areas of the photosensitive paper, for forming latent images corresponding to said images on said original;
- and
- a developing device for developing said latent images into visible images on said photosensitive paper.
2 more elements
A copying apparatus operable with an original in the form of a sheet having an image-bearing surface on which images to be reproduced are supported, comprising:
- a transparent support plate having a top surafce on which said original is placed with said image-bearing surface thereof in face to face contact with said top surface;
- an image-illuminating device operable to produce a light for illuminating said image-bearing surafce of the original;
- a photosensitive paper of a self-activated type disposed in facing relation with said image-bearing surface of the original, said photosensitive paper being sensitive to rays included in the light reflected by said image-bearing surface;
- an optical system for converging and thereby focusing said reflected light on a surface of said photosensitive paper, to expose local areas of the photosensitive paper, for forming latent images corresponding to said images on said original;
- a developing device for developing said latent images into visible images on the exposed photosensitive paper;
- and
- an auxiliary illuminating device operable to produce a light for re-exposing said photosensitive paper on which said visible images have been formed.
4 more elements
A copying apparatus operable with an original in the form of a sheet having an image-bearing surface on which images to be reproduced are supported, comprising:
- an image-illuminating device operable to produce a light for illuminating said image-bearing surafce of the original;
- a photosensitive paper of a transfer type disposed in facing relation with said image-bearing surface of the original, said photosensitive paper being sensitive to rays of a wavelength included in the light reflected by said image-bearing surface;
- an optical system for converging and thereby focusing said reflected light on a surface of said photosensitive paper, to expose local areas of the photosensitive paper, for forming latent images corresponding to said images on said original;
- a recording paper having a developer layer;
- and
- a developing device for superposing the exposed photosensitive paper and said recording paper on each other, and applying a pressure to said photosensitive paper and said recording paper toward each other, thereby developing said latent images into visible images on said recording paper.
3 more elements
A copying apparatus comprising:
- a photosensitive paper of a self-activated type which comprises a substrate, a developer layer formed on said substrate, and a multiplicity of microcapsules formed on said developer layer or embedded in said developer layer, each of said microcapsules comprising a photosensitive base resin, and a chromogenic material which reacts with said developer layer;
- and
- an image-illuminating device for illuminating a surface of an original having images to be reproduced, said image-illuminating device producing a light which is reflected by said surface of the original, the reflected light including rays to which said photosensitive base resin of said microcapsules of said photosensitive paper is sensitive, whereby latent images are formed on said photosensitive paper by means of selective exposure of said microcapsules to said rays.
A copying apparatus comprising:
- a photosensitive paper comprising a multiplicity of microcapsules each of which includes a photosensitive base resin, and a chromogenic material encapsulated within said base resin;
- a recording paper having a developer layer with which said chromogenic material of said each microcapsule is adapted to react;
- an image-illuminating device for illuminating a surface of an original having images to be reproduced, said image-illuminating device producing a light which is reflected by said surface of the original, the reflected light including rays to which said photosensitive base resin of said microcapsules of said photosensitive paper is sensitive, whereby latent images are formed on said photosensitive paper by means of selective exposure of said microcapsules to said rays, so that said photosensitive paper is used as an image transfer sheet after exposure to said rays of the reflected light;
- and
- a developing device for placing said image transfer sheet in pressed face to face contact with said recording paper so that said chromogenic materials of the exposed microcapsules react with said developer layer, to produce visible images on said recording paper, said visible images corresponding to said latent images formed on said image transfer sheet.
2 more elements
Dependencies are inferred from the claim text.