Impression setting mechanism for a printing unit
AssigneeHeidelberger Druckmaschinen AG
InventorsDouglas Joseph Dawley, David John Gagnon
Life of this patent
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Abstract
The present invention is related to a printing unit including a frame (2) and an upper plate cylinder (12) mounted in the frame (2). An upper blanket cylinder (16) is in selective contact with the upper plate cylinder (12), and a lower blanket cylinder (18) forms a nip with the upper blanket cylinder (16). A web (8) passes through the nip. A lower plate cylinder (14) contacts the lower blanket cylinder (18). Impression setting means (60, 62, 82) are assigned to movable housings (40, 44) of the movable cylinders (12, 14, 16). The impression setting means (60, 62, 82) are provided to adjust forces exerted on bearers (20) of the printing unit cylinders (12, 14, 16).
Claims21
Printing unit comprising:
- a frame;
- an upper plate cylinder mounted in the frame;
- an upper blanket cylinder in selective contact with the upper plate cylinder;
- a lower blanket cylinder for forming a nip with the upper blanket cylinder;
- a web passing through the nip;
- a lower plate cylinder for contacting the lower blanket cylinder;
- movable bearing housings for the upper plate, lower plate, and upper blanket cylinders, wherein the movable bearing housings for the upper and lower plate cylinders pivot about translatable pivot pins mounted in the frame, and translating the translatable pivot pins with respect to the frame cocks the upper and lower plate cylinders with respect to the upper and lower blanket cylinders;
- and
- impression setting means assigned to the movable bearing housings of the upper plate, lower plate, and upper blanket cylinders for adjusting a force exerted upon bearers assigned to the upper plate, lower plate, and upper blanket cylinders.
Printing unit comprising:
- a frame;
- an upper plate cylinder;
- a lower plate cylinder;
- an upper blanket cylinder;
- a lower blanket cylinder;
- and
- a movable housing for each of the upper plate cylinder, the lower plate cylinder and the upper blanket cylinder, wherein
- the upper plate cylinder is pivotally attached to the frame via the corresponding movable housing, and the upper plate cylinder rotates within the corresponding movable housing,
- the lower plate cylinder is pivotally attached to the frame via the corresponding movable housing, and the lower plate cylinder rotates within the corresponding movable housing,
- the lower blanket cylinder is fixedly mounted in the frame between the upper and lower plate cylinders, and
- the upper blanket cylinder is pivotally attached to the frame, via the corresponding movable housing, between the upper and lower plate cylinders adjacent to the lower blanket cylinder, and the upper blanket cylinder rotates within the corresponding movable housing and forms a nip with the lower blanket cylinder;
- a web passing through the nip formed by the lower blanket cylinder and the upper blanket cylinder;
- an actuating member that is extendible and contractible;
- and
- a plurality of compression means arranged on the actuating member to bias the movable housings so that
- a) when the actuating member is contracted, the compression means bias the movable housings of the upper and the lower plate cylinders toward the upper blanket cylinder and lower blanket cylinder, respectively, and
- b) when the actuating member is extended, the upper plate cylinder and the lower plate cylinder are separated from the upper and lower blanket cylinders, respectively.
Printing unit comprising:
- a frame;
- an upper plate cylinder mounted in the frame;
- an upper blanket cylinder in selective contact with the upper plate cylinder;
- a lower blanket cylinder for forming a nip with the upper blanket cylinder;
- a web passing through the nip;
- a lower plate cylinder for contacting the lower blanket cylinder;
- and
- impression setting means assigned to movable bearing housings of the upper plate, lower plate, and upper blanket cylinders for adjusting a force exerted upon bearers assigned to the upper plate, lower plate, and upper blanket cylinders, the impression setting means including compression means for exerting force on the movable housings of the upper and lower blanket cylinders;
- wherein the compression means is adjustable to vary the force exerted by the compression means on the movable housings of the upper and lower plate cylinders.
Dependencies are inferred from the claim text.