Device for clamping printing forms in clamping channels of reduced size
AssigneeHeidelberger Druckmaschinen AG
InventorFranck Chagnon
Life of this patent
Estimating the term…
Abstract
Device for holding a flexible printing form along the circumference of a printing form cylinder, so that a leading edge of the printing form engages beyond a leading edge of a clamping channel extending across the circumferential surface of the cylinder, comprising at least one resilient holding element secured to an actuatable clamp shaft for fixing a trailing edge of the flexible printing form, said holding element being a spring element that is engageable behind the trailing edge of the printing form with play when the clamp shaft is actuated; a printing form cylinder having the holding device; a printing unit of a rotary printing machine having the holding device; and a printing unit of a rotary printing machine having a printing form cylinder including the holding device.
Claims11
Device for holding a flexible printing form having a trailing edge, the device comprising:
- a printing form cylinder formed with a circumferential surface and having a cylinder bore with an interior surface;
- said printing form cylinder having a clamping channel formed therein extending across said circumferential surface of said printing form cylinder, said clamping channel having first and second non-parallel sidewalls and extending trapezoidally outwardly from said interior surface of said cylinder bore, said first a sidewall of said clamping channel being formed with a recess having a surface delimiting said recess;
- an actuatable clamp shaft formed with a circumferential surface and disposed in said cylinder bore;
- and
- at least one resilient holding element formed as a spring element secured to said actuatable clamp shaft for fixing the trailing edge of the printing form;
- said holding element having an upper part adapted to dip into said recess by rotation of said clamp shaft and adapted to engage behind the trailing edge of the printing form;
- said surface delimiting said recess and the trailing edge of the printing form forming a play therebetween sufficient for mounting the printing form.
Dependencies are inferred from the claim text.