Method and device for adjusting the position of movable working members with respect to respective stationary datum surfaces

A method for adjusting the position of at least one movable working member with respect to a stationary datum surface, in a packaging machine, the method comprising:

• providing the packaging machine having the at least one working member and a device for adjusting the position of the working member during a change-over operation, for adjusting the working member to accommodate a package of a particular size with respect to the stationary datum surface,
• providing the device with a plurality of selectable stop means, connected to the stationary datum surface, the stop means being different in length from one another, the length corresponding to a position of the working member necessary for working the package of a particular size;
• providing the device with a sliding support for supporting the working member whose position is to be adjusted, the sliding support being mounted on guide means which are adjacent to the stationary datum surface;
• placing the sliding support in abutment with a selective stop means to maintain a predetermined distance between the working member and the stationary datum surface and fixing the sliding support in this position until the next changeover operation so that the predetermined distance is maintained between the working member and the datum surface.