Printing unit
OwnerJan N. Stenqvistinventor
Life of this patent
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OwnerJan N. Stenqvistinventor
Estimating the term…
A printing unit comprises an impression cylinder (3) and an inking roller (4) adjustably spaced from the impression cylinder (3) by means of a pair of first lever arms (10) which are pivotal and eccentrically mounted in relation to the axis of rotation (18) of the roller (4). An elongate doctor blade (8) for wipe-off engagement with the roller (4) is supported by a pair of second pivotal lever arms (19) which are concentrically mounted in relation to the axis of rotation (18) of the roller (4) and eccentrically mounted in relation to the fulcrum (15) of the first lever arms (10), whereby the doctor blade (8) and the roller (4) maintain their relative positions during the adjustment of the spacing between the roller (4) and the impression cylinder (3). Thus, the doctor blade (8) follows the movements of the inking roller (4) while maintaining the parallelism between them. The pivotment and the setting of the lever arms (10) and (19) are brought about by adjusting devices (16) and (23), respectively.
A printing unit (1) comprising a rotary impression cylinder (3), an inking device (9), a rotary inking roller (4) in said inking device, said impression cylinder and inking device being mounted on a machine frame, said inking roller (4) having an axis of rotation (18) defining a shaft, means for adjusting said inking roller toward and away from said impression cylinder, said means including a first lever device (10, 11) which is pivotal about a pivot axis (15) and eccentrically mounted in relation to the axis of rotation (18) of said inking roller, said inking roller being mounted and rotatably supported by said first lever device, the printing unit (1) further having a doctor blade (8) movable into wipe-off engagement with the inking roller (4), a second pivotal lever device (19, 20) concentrically mounted in relation to the axis of rotation (8) of the inking roller (4) and eccentrically mounted for pivotal movement in relation to the pivot axis (15) of the first lever device (10, 11), said doctor blade (8) being mounted on and supported by said second lever device (19, 20), whereby the doctor blade (8) and the inking roller (4) will maintain their relative positions when adjusting the spacing between the inking roller (4) and the impression cylinder (3) by displacement of said first lever device (10, 11).
Dependencies are inferred from the claim text.