H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/327
H01H 3/16 (2006.01) B41F 21/10 (2006.01)
Patent
CA 2003824
The arrangement for the electrical fuse protection of the clamping device is shown on a sheet guide drum for printing machines for either first form or sheet work. The actuating element (27) of the clamping device is positioned in such a manner that it can be screwed axially, by means of a thread, between final positions, whereby screwing in a first section actuates a switching element (28) for an electrical switch (30) which is located in the power supply circuit for the drive of the printing machine. When it moves along a second section, the actuating element (27) acts on intermediate members, which press together at least one friction surface on the sheet guide drum, and one friction surface on a part of the drum which can be adjusted in the direction of the circumference of the sheet guide drum. The final positions are delimited by buffers consisting of one cam (32) on the actuating element (27) and two cams (33a, 33b) on a part of the machine mounted in a torsion-proof manner, whereby the two cams (33a, 33b) are each assigned to one final position, and are located in the direction of the axial displacement of the actuating element (27), at a distance from one another which is greater than the thread pitch, and whereby the axial overlap of the cam (32) on the actuating element (27) with one of the two other cams (33a, 33b) in the buffer position is smaller than the thread pitch.
Heidelberger Druckmaschinen Aktiengesellschaft
Johnson Douglas S. Q.c.
LandOfFree
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