Doctor blade for wiping away excess printing ink from the surface of a printing form
AssigneeMDC Max Datwyler Bleienbach AG
InventorMax Dätwyler
Life of this patent
Estimating the term…
Abstract
A doctor blade for wiping excess printing ink off the surface of a printing form (10) has a front section in the form of a leaf (3) which interacts with the surface of the printing form (10). In order to avoid wear or damage to the printing form surface as a result of the contact pressure exerted by the leaf (3) on the printing form surface, the leaf (3) is provided with a coating (5) over the entire doctor blade length. The coating (5) consists of lubricant or contains lubricant particles (8). As a result of the significant reduction in friction between the leaf (3) and the printing form surface, not only is the wear on the printing form surface reduced, but the wear on the doctor blade is also reduced, and its service life is extended.
Claims11
A doctor blade for wiping excess ink off the surface of a printing form, comprising
- a front section which interacts with the surface of the printing form, and which has a predetermined length, and
- a coating overlying at least one side of the front section of the blade, along at least substantially the entire length thereof, with said coating comprising a lubricant or a carrier material containing lubricant particles, and further comprising particles of a wear resistant material.
A printing press which comprises
- a printing cylinder mounted for rotation about its axis, and
- a doctor blade for wiping excess ink off the surface of the rotating printing cylinder, said doctor blade being mounted immediately adjacent the printing cylinder so as to extend parallel to the axis of the printing cylinder and comprising
- a front section which interacts with the surface of the printing form, and which has a predetermined length, and
- a coating overlying at least one side of the front section of the blade, along at least substantially the entire length thereof, with said coating comprising a lubricant or a carrier material containing lubricant particles, and further comprising particles of a wear resistant material.
Dependencies are inferred from the claim text.