An ink fountain for supplying ink to the ink carrying surface of a printing press form roll has an ink receptacle which may be removed from and reinstalled into the press separate from the adjustable support assembly which maintains it in an operative position with respect to the form roll. The adjustable support assembly enables a doctor blade on the ink receptacle to be placed in an optimum position with respect to the ink carrying surface of the form roll. Dam members which seal front portions of the ink receptacle to the form roll are, in a preferred embodiment, formed as part of the ink receptacle assembly and are removed and reinstalled together with the ink receptacle. The dam members may be formed of a relatively inexpensive, resilient plastic material whereby it is more economic to dispose of them and replace them with new dam members rather than clean them.
A cassette for a wedge-shaped ink well of a printing machine has a bottom and a rear wall and two side walls. A front of the cassette, opposite the rear wall, faces a duct roller of the printing machine when the cassette is inserted into the ink well and is open. A handle connected to the upper portions of the side walls is positioned such that the cassette tends to incline to prevent ink from flowing out of the front of the cassette when the cassette is handled outside of the printing machine. The bottom and the sides of the cassette are sealed against the ink well adjacent to the duct roller. A seating arrests movement of the cassette relative to the ink well when the cassette is inserted in the ink well thus ensuring that the duct roller uniformly inked between sides of the ink well.
To permit easy removal and/or engagement and disengagement of a chambered doctor blade unit (1) from an anilox roller (2), the chambered doctor blade unit is attached to a holder (4) which has axially extending projecting pins or bolts (6, 7). The pins or bolts (6, 7) engage in hook-like extensions (12, 13) depending from a cross member (9) extending between the side walls (8) of the printing machine. An eccentric clamping cam disk (10) is rotatable about the cross member (9) and bears, in dependence on the rotary position thereof, against an upper surface of the holder for the chambered doctor blade unit (1) to thereby ensure interengagement of the projecting pins or bolts (6, 7) in the hook-like extensions (12, 13) and on support as well as locating surfaces (14, 16; 17, 18) thereof, while permitting quick release of this interengagement permitting movement and easy removal of the chambered doctor blade unit (1).
The present invention relates to an ink supplying apparatus capable of achieving labor-saving of the cleaning operation and shortening of the working time at ink replacement or the like in a printing press. This ink supplying apparatus is equipped with an ink tray provided in the interior of an ink fountain and having a bottom plate which covers upper surfaces of ink keys, and further equipped with a deflection restraining structure for supporting the bottom plate from below to restrain the deflection of the ink tray.
An inking device of a rotary press comprises an ink fountain roller rotatably supported on left and right frames, and an ink fountain device movable toward and away from the ink fountain roller. The ink fountain device is switchable among a fixed position close to the ink fountain roller, a throw-off position separated from the ink fountain roller, and an intermediate position provided between the fixed position and the throw-off position, and switching means is provided for switching the ink fountain device by a pivoting operation of a locking handle so that the ink fountain device is located at any of the three positions. The inking device makes it easy to secure a vertical space for operating an ink fountain, and can fix the ink fountain device with a constant clamping force without a tool.
An ink system of a rotary printing press includes a roller and a working doctor blade. The roller has a structured surface which may include helical or annular grooves.
