Method and apparatus for setting up at least one tool on a tool carrier in relation to format

#The invention relates to a method and an apparatus for setting up at least one holding arrangement for a workpiece and/or a tool on a tool carrier in relation to a specified format. In particular, a holding arrangement serving to hold an envelope blank and a transverse creasing cylinder, as a tool carrier, may be provided.

#It is known, for holding envelope blanks during the production of transverse creases, to apply vacuum to suction openings arranged in rows after one or two of several suction hole rows have been selected in each case in relation to the format and with respect to a creasing blade arranged rigidly at the circumference of the transverse creasing cylinder. This is done by means of expensive setting means of complicated design, so that the aim of the invention is to provide an especially simple method and an apparatus of correspondingly simple design for the accurate setting of a holding arrangement and/or of a tool on the tool carrier, i.e., in the present case, specifically on the transverse creasing cylinder.

#To achieve the above stated object, the invention provides for the fixing of the adjustable holding arrangement and/or of the tool relative to the tool carrier in at least one setting position to be effected magnetically.

#The invention is described in more detail below with reference to an exemplary embodiment shown in the drawing, in which:

#FIG. 1 shows a schematic side view of the essential parts of a creasing station in an envelope making machine;

#FIG. 2 shows, on a different scale, a section through a creasing cylinder and its mounting and the suction air connection;

#When making envelopes 1, 101 according to FIGS. 8 and 11, respectively, it is necessary for longitudinal creases 3, 103 and 4, 104 lying in the longitudinal direction, i.e. in the transport direction (see arrow in FIG. 9 or 10), and, transversely thereto, transverse creases 5, 105 and 6, 106 to be provided in the still continuous paper web or in the already singularized envelope blanks 2, 102 according to FIGS. 9 and 10, respectively, so that an envelope 1, 101 can be produced from the envelope blanks 2, 102 by folding over and adhesively bonding the side parts 7, 107 and 8, 108 to the back part 9, 109. The envelope 1 according to FIG. 8 has an additional, third transverse crease 10 for a counter flap 11, which is turned over to begin with. The envelope 101 according to FIG. 11 likewise has a third crease for straightening the closing flap 112 again. The transverse crease 10, 110 is made on a side of the envelope blank 2, 102 which is opposite the side of the transverse creases 5, 105 and 6, 106, respectively. Except for the closing flaps, the envelopes 1, 101 largely correspond. Thus the side parts 7, 107 and 8, 108 can be folded onto one another about longitudinal creases 3, 103 and 4, 104, and the closing flap 12, 112 can be folded about the transverse crease 6, 106, and the front part 13, 113 and the back part 9, 109 can be folded onto one another about the transverse crease 5, 105.

#To produce the transverse creases 5, 105 or 6, 106 and 10, 110, a transverse creasing station 21 is provided in an envelope making machine and comprises a plurality of cylinders and rollers, which in the exemplary embodiment shown schematically in FIG. 1 are a feed cylinder 22 and, in the transport direction, a first transverse creasing cylinder 23 with a counter-cylinder 24, and a second transverse creasing cylinder 25 with an associated counter-cylinder 26, and also a transport cylinder 27, likewise only shown schematically. The envelope blank 102 is shown by a dot-dash line in FIG. 1 on parts of the circumference of the two transverse creasing cylinders 23 and 25.

#The transverse creasing cylinders 23 and 25 have creasing blades 28, 29. It is basically the case here that one creasing blade, such as, for example, the creasing blade 28 on the associated transverse creasing cylinder 25, is arranged rigidly, whereas the other creasing blade 29 is adjustable in the circumferential direction. This is not shown in detail in FIG. 1.