Apparatus for adjusting a tensioning device in plate cylinders of rotary printing machines
AssigneeMaschinenfabrik Wifag
InventorWolfgang Kamm
Life of this patent
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Abstract
In a rotary printing machine, the cylinder for holding the printing plate has a printing plate tensioning device formed in it, which includes an adjustably positionable tensioning rail. To adjust this rail, a set of marks is formed on the cylinder. A support base carries an optical device to view the marks. On the base there are tensioning rail engaging adjustably positionable abutments and the alignment of the marks in the field of view of the optical device enables proper positioning of the abutments and of the tensioning rail.
Claims8
Apparatus for adjusting a tensioning rail of a tensioning device in a printing plate support cylinder of a rotary printing machine, comprising:
- a support base member;
- at least one abutment member engageable with the tensioning rail;
- said abutment member being supported by said base member and being adjustable in position with respect to said base member;
- an optical control device supported on said base member, oriented so as to view a field of view on the plate cylinder and spaced away from said abutment member a distance measured angularly around the plate cylinder;
- adjustable support means on said base member and engageable with the plate cylinder for adjusting the tilt and orientation of said base member on and with respect to the plate cylinder, thereby to orient said optical control device to have its field of view radially aligned with the plate cylinder;
- said base member having a bottom, a top and sides;
- said abutment member projecting from a said side of said base member and is movable with respect to that said side;
- said optical control device being above said top of said base member;
- said support means extending beneath said bottom of said base member.
Dependencies are inferred from the claim text.