B - Operations – Transporting – 41 – F
Patent
B - Operations, Transporting
41
F
101/57
B41F 1/10 (2006.01) B41F 21/10 (2006.01) B65H 9/00 (2006.01)
Patent
CA 1192082
ABSTRACT OF THE DISCLOSURE The invention relates to sheet transfer cylinders (2) on sheet-fed rotary printing machines with a device (15) for the register correction of overprints by deformation of the leading sheet edge (8) by means of flexure of the gripper fly shaft (10). The problem of wider or narrower printing due to slight dimensional changes is solved in a simple way, as shown in Figure 1, by utilizing the swinging movement of sheet transfer cylinders (2) with pivoted gripper fly (6), to deform the leading sheet edge (8) in the centre, in or against the cylinder running direction. For this purpose, the centre gripper fly shaft bearing (11) is mounted in a pivoted bearing about a point of rotation (12) parallel to the cylinder axis (14). During the rotational move- ment of the gripper fly shaft (10), a cam (16) which is in a fixed mounting on the shaft runs against a roller (17) mounted on a support (13) of the cylinder axis (14). restoring spring (19), which engages the centre gripper fly shaft bearing (11), ensures that the cam (16) is always in contact with the roller (17). Depending on the design and the initial position of the cam (16), flexure of the gripper fly shaft (10), by means of spring resilience, is possible in or against the cylinder running direction, and the degree of flexure is adjustable.
400026
Heidelberger Druckmaschinen Aktiengesellschaft
Johnson Douglas S. Q.c.
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