Back to results
US 4,069,759 AGranted
Light and heat formation of conductive image printing plate
AssigneeCanon Kabushiki Kaisha
InventorsIchiro Endo, Hajime Kobayashi, Kikuo Kinjo, deceased
Life of this patent
Estimating the term…
Abstract
A master for electrostatic printing comprises a layer composed of conductive silver image portion containing metallic silver grains and a non-silver image portion having an electric resistance sufficient to retain electrostatic charge. The image formed by image light exposure and heating a layer including an organic silver salt compound, a reducing agent and an insulating medium.
Claims35
A process for electrostatic printing comprising the steps of:
- A. providing a member having an insulating photosensitive layer including an organic silver salt compound, a reducing agent and an insulating medium, wherein said member, when treated by a process including exposure to image light from an original, provides in the layer a conductive metallic silver grain image corresponding to said image light,
- B. employing said treated member as a master by forming an electrostatic latent image thereon,
- C. developing said image and
- D. transferring said developed image to a transfer material, whereby the durability of said master and the resolution of said developed image are unexpectedly enhanced.
1 more element
A process for electrostatic printing comprising the steps of:
- A. providing a member having an insulating photosensitive layer formed by dispersing a silver salt compound in an insulating medium, wherein said member, when treated by a process including exposure to image light from the original, provides in the layer a conductive metallic silver grain image corresponding to said image light, said silver grain image having a specific resistance .rho..sub.1 less than 10.sup.13 ohm.multidot.cm, the remaining portion of said layer having a specific resistance .rho..sub.2 more than 10.sup.11 ohm.multidot.cm, and .rho..sub.1 is less than .rho..sub.2 by a factor of two powers of ten or more;
- B. employing said treated member as a master by forming an electrostatic latent image thereon,
- C. developing said image and
- D. transferring said developed image to a transfer material, whereby the durability of said master and the resolution of said developed image are unexpectedly enhanced.
1 more element
A process for electrostatic printing comprising the steps of:
- A. image wise exposing a heat developable photosensitive member having a layer formed by dispersing uniformly a silver salt compound in a insulating medium to form a latent image including metallic silver particles;
- B. heating with or after said image wise exposure to develop said latent image and form a conductive metallic silver grain image,
- C. employing said developed member as a master by forming an electrostatic latent image thereon,
- D. developing said image and
- E. transferring said developed image to a transfer material, whereby the durability of said master and the resolution of said developed image are unexpectedly enhanced.
2 more elements
Dependencies are inferred from the claim text.