Photocopying – Contact printing – Light boxes
Patent
1993-12-20
1995-04-25
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
355256, G03G 1516, G03G 1501
Patent
active
054103924
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to image transfer techniques and apparatus for use in electrophotography.
BACKGROUND OF THE INVENTION
Various prior publications deal with the transfer of single and multiple powder and liquid toner images from a photoreceptor on which they are formed to an intermediate transfer member for subsequent transfer to a final substrate.
U.S. Pat. No. 3,838,919 to Takahashi describes a powder toner system in which color toner images are sequentially formed on an image forming member, individually transferred to an intermediate transfer member and transferred at one time to a recording member.
U.S. Pat. No. 4,144,808 to Isawa et al. describes a method of printing on a metal plate utilizing powder toner and an intermediate transfer member where the plate is heated before transfer.
U.S. Pat. No. 4,518,976 to Tarumi et al. describes a monochrome powder toner system in which a powder image is developed on a photoreceptor, and transferred electrostatically to an intermediate transfer member. Downstream this transfer, the intermediate transfer member and the image thereon are heated before transfer to a preheated substrate.
U.S. Pat. No. 4,515,460 to Knechtel, describes a powder toner apparatus wherein separate toner images are sequentially developed on a photoreceptor and electrostatically transferred to an intermediate transfer member. After all of the individual images have been transferred to the intermediate transfer member, they are transferred electrostatically to the final substrate. No heating of the images or substrate is disclosed.
U.S. Pat. No. 4,585,319 to Okamoto et al. describes a powder developer type, single color system, utilizing a temperature controlled photoreceptor, a heated intermediate transfer member and a heated transfer fixing roller which is heated to a temperature slightly higher than that of the intermediate transfer member.
U.S. Pat. No. 4,690,539 to Radulski et al. describes a liquid toner multi-color system in which a color image is developed on a photoreceptor and transferred to a belt type intermediate transfer member. The liquid carrier is removed from the toner image on the belt. There is no mention of heating the intermediate transfer member or of the problem of back transfer.
U.S. Pat. No. 4,708,460 to Langdon describes a single color liquid toner system in which a developed image is transferred from a photoreceptor to an intermediate transfer member, heated on the transfer member and then transferred to a final substrate.
U.S. Pat. No. 3,847,478 to Young describes a duplex printing system, wherein a developed image is transferred from a photoconductor to an intermediate transfer member, a second image is developed on the photoconductor and both images are transferred electrostatically to opposite sides of a piece of paper passed between the intermediate transfer member and the photoreceptor.
SUMMARY OF THE INVENTION
The present invention seeks to provide improved apparatus for the transfer of an image from an image bearing surface to an intermediate transfer member and subsequent transfer to a final substrate.
There is thus provided in accordance with a preferred embodiment of the invention imaging apparatus for printing an image on a substrate from a latent image formed on a latent image bearing surface including developing apparatus for developing the latent image with toner, preferably with liquid toner having carrier liquid and toner particles, to form a developed toner image of a given size, a first intermediate transfer member, preferably having a cylindrical shape and having a surface area large enough to accommodate the developed toner image, first transfer apparatus for transferring the developed toner image from the latent image bearing surface to the first intermediate transfer member, a second intermediate transfer member, preferably a cylindrical shape having a surface area smaller than the surface area of the first intermediate transfer member and second transfer apparatus for transferring of the developed i
REFERENCES:
patent: 3838919 (1974-10-01), Takahashi
patent: 3847478 (1974-11-01), Young
patent: 3863603 (1975-02-01), Buckley et al.
patent: 3959574 (1976-05-01), Seanor et al.
patent: 4144808 (1979-03-01), Iwasa et al.
patent: 4515460 (1985-05-01), Knechtel
patent: 4518976 (1985-05-01), Tarumi et al.
patent: 4585319 (1986-04-01), Okamoto et al.
patent: 4684238 (1987-08-01), Till et al.
patent: 4690539 (1987-09-01), Radulski et al.
patent: 4708460 (1987-11-01), Langdon
patent: 4794651 (1988-12-01), Landa et al.
patent: 4974027 (1990-11-01), Landa et al.
patent: 5150161 (1992-09-01), Bujese
Indigo N.V.
Pendegrass Joan H.
LandOfFree
Imaging system with intermediate transfer members does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Imaging system with intermediate transfer members, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging system with intermediate transfer members will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1571402