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US 6,539,859 B2Granted
Multicolor printing press
AssigneePresstek, Inc.
InventorRichard A. Williams
Life of this patent
Estimating the term…
Abstract
A multicolor lithographic printing press utilizes a blanket member having a release surface with a transfer rate approaching 100%. This facilitates a press design utilizing a single blanket member to transfer multiple colors of ink onto a recording medium.
Claims12
A multicolor lithographic printing press comprising:
- a. a plate cylinder having a diameter, a circumference, and a plurality of image regions extending fully around the circumference the plate cylinder being configured to receive plate material extending over all of the image regions;
- b. at least one imager for placing a lithographic image on the plate material at each of the image regions;
- c. at least one inking mechanism for transferring ink to each of the images, the images each receiving ink of a different color;
- d. a single blanket member in rolling contact with the plate cylinder for sequentially receiving the ink from each of the images as the plate cylinder rotates the blanket member having a diameter less than the diameter of the plate cylinder;
- and
- e. an impression member for receiving a recording medium, the impression member being in rolling contact with the blanket member, the blanket and impression members cooperating to successively transfer the ink from each of the images onto the recording medium.
3 more elements
A printing method comprising:
- a. providing a plate cylinder having a diameter, a circumference, and a plurality of image regions extending fully around the circumference;
- b. disposing plate material on the plate cylinder;
- c. placing a lithographic image on the plate material at each of the image regions;
- d. transferring ink to each of the images, the images each receiving ink of a different color;
- e. using a single blanket member in rolling contact with the plate cylinder to sequentially receive the ink from each of the images as the plate cylinder rotates and to successively transfer the ink from each of the images onto a recording medium wherein the blanket member has a diameter less than the diameter of the plate cylinder.
2 more elements
Dependencies are inferred from the claim text.