Nova Patents
EP1644201B2

Printing blanket with convex carrier layer

Abstract

An offset printing press is provided. The offset printing press includes an image cylinder, a blanket cylinder having an axially convex outer surface, and a printing blanket disposed over the axially convex outer surface, the printing blanket including a carrier sleeve layer having at least one axially convex surface. An axially profiled shim is also provided.

EP1644201B2, drawing sheet 1
Sheet 1 of 6

Term

Term ended

Expired 5 July 2024, 2.2 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

17 claims: 11 independent, 6 dependent

  1. 1
    A printing blanket comprising:a carrier sleeve layer (22) having at least one axially convex surface;and a print layer (26) disposed over the carrier sleeve layer, wherein an outer surface of the print layer has a convex axial profile when the blanket is disposed on the blanket cylinder without pressure, wherein the carrier sleeve is of uniform thickness.
  2. 3
    The printing blanket as recited in any one of claims 1 or 2 wherein the print layer is gapless and tubular.
  3. 4
    The printing blanket as recited in any one of claims 1 to 3 wherein the carrier sleeve layer (22) is solid and rigid enough to maintain a tubular shape.
  4. 5
    The printing blanket as recited in any one of claims 1 to 4 wherein the blanket provides uniform axial print or nip pressure across the width of the blanket.
  5. 6
    The printing blanket as recited in any one of claims 1 to 5 further including a compressible layer disposed between the carrier sleeve layer and the print layer.
  6. 8
    The printing blanket as recited in any one of claims 1 to 7 wherein the printing blanket has at least two axial image areas.
  7. 11
    The printing blanket as recited in any of claims 1 to 10 wherein the printing blanket has only one image in the circumferential direction.
  8. 12
    The printing blanket as recited in any of claims 1 to 11 wherein the carrier sleeve layer is made of fiberglass.
  9. 13
    An offset printing press comprising:an image cylinder;a blanket cylinder;and a printing blanket according to any of the preceding claims, the printing blanket being disposed over the blanket cylinder.
  10. 16
    An offset printing press as recited in one of claims 13 to 15 the blanket cylinder comprising a cylinder body having an axially convex outer surface, and the printing blanket being disposed over the axially convex outer surface.
  11. 17
    An offset printing press as recited in one of claims 13 to 16, comprising an axially profiled shim placed between the blanket cylinder and the blanket, the shim comprising:a shim body having an axially convex outer surface.
Independent claims11