| 摘要 |
An ink supply and ink level control device is mounted on an ink fountain of a printing machine. The device has a control and power head and an ink supply conduit and casing assembly removably connected to the head. The head includes a reciprocable output member, a reversible drive motor connected to produce limited linear displacement in one direction or the other of the output member, a pair of limit switches mounted for operation in response to movement of said output member to the limits, respectively, of its linear displacement, and an electronic proximity detector projecting from said head toward the surface of ink in said ink fountain to sense the relative proximity of the surface of the ink. The assembly includes a conduit for receiving ink from a source of ink and is removably fastened to the output member for limited linear displacement thereby, and an elongated tube-like casing partially enclosing said supply conduit and removably fastened at one end to the head. The conduit has multiple, spaced wall orifices, and valve means are provided for controlling the discharge of ink through the orifices which are opened at one limit of the linear displacement of the conduit by the output member and are closed at the other limit of its linear displacement thereby. Automatic control means are also included in the head for maintaining a predetermined level of ink in the ink fountain in the form of electric circuit means connecting the proximity detector and limit switches to activate the motor to displace said conduit to its limit in one linear direction or the other for opening or closing the valve means responsive to the level of ink in the ink fountain.
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