Abstract: An ink supply system for writing instruments which operate with liquid ink. The writing instrument has a large-volume ink reservoir which communicates via a recharge valve with a small-volume ink reservoir which is adjacent to the writing element. The transmission of ink from the large-volume ink reservoir to the secondary reservoir is controlled by a sensor as a function of the quantity of ink which is present in the secondary ink reservoir. In order to simplify the recharging of the ink, and to be able to operate with the least possible electrical energy, the present invention utilizes as a recharge valve a tube pump which is rotatably driven by an electric motor and also generate the pressure necessary to convey the ink to the secondary ink reservoir.

Abstract: A combination writing instrument comprising a plurality of nib devices detachably mounted at the front of pen holder, all of the nib devices being mounted in a head-to-tail connection with a uniform ink flow system to induce a constant and uniform ink flow from an ink reservoir to the front-most writing point for immediate and smooth writing, so that the user can select one of the nib devices to perform a desired writing purpose and enjoy a variety of writing modes.

Abstract: An ink supply system for writing instruments which operate with liquid ink or writing fluid. In order to make uniform the supply of ink or writing fluid independent of environmental influences, and to make possible a longer writing time with one filling, it is proposed to first store the writing fluid in a primary, permanently compressible, non-capillary and large-volume supply chamber. From this primary supply chamber, a small-volume, capillary secondary supply chamber, which communicates with the writing element, is supplied via an auxiliary charging valve which is controllable as a function of need for ink or writing fluid. The filling of the secondary supply chamber can be detected with a sensor, and the auxiliary charging valve can be controlled.

Abstract: A ball-point writing instrument in which dislodging of the rotating ball as a result of accidental droppage on a hard surface is prevented by employing an ink reservoir construction designed to prevent propagation of a travelling pressure step in the column of ink above the rotating ball.

Abstract: A cleaning fluid cartridge, adapted for use with a cleaning system having a handle and a cleaning brush attached thereto, wherein a flexible bag contains the cleaning fluid, and a check valve is sealingly disposed within an opening in the flexible bag.

Abstract: A writing instrument of an extremely simple structure in which stored ink previously extruded upon increase of the internal pressure of an ink chamber is subsequently sucked up by decrease of the internal pressure of the ink chamber and returned to the ink chamber, thereby preventing the outputting of ink drops in a downward orientation of pen, particularly when a large amount of ink is stored.

Abstract: A fountain pen in which ink is supplied to the tip of the pen under the control of a motor-actuated ink delivery device. An ink holder is formed covering the slit formation region of the pen tip to form an ink pool between the holder and pen tip. A detector is provided in the ink pool for detecting the quantity of ink therein at any time. A pen holder coupled to the pen tip includes an ink storing section opening into the ink pool, an ink delivery device coupled to the ink storing section for delivering ink under pressure, and an electrical power source and a power delivery circuit for controlling the flow of current to an operating motor.

Abstract: An ink pen has master and slave ink reservoirs and an ink lock communicating with one or more capillary buffer channels inside the master reservoir and preventing air flow to the slave reservoir.

Abstract: This invention relates to a container having a reservoir for storing a liquid and an intermediate storage space communicating with said reservoir and adapted to receive liquid therefrom on generation of a vacuum therein. Communication between reservoir and intermediate storage space is through a capillary tube having an inside diameter small enough so that a column of liquid is maintained therein whenever pressures in said reservoir and storage space are substantially equal, but large enough so that liquid flows into the storage space when pressure therein is lower than in the reservoir. The closure for the container comprises a piston which, as the container is opened, moves out of the storage space to create a vacuum therein.

Abstract: A fountain brush has a bristle carrier and a set of bristles on one end thereof, a handle attached to the other end of the bristle carrier and a reservoir a channel extends axially through the bristle carrier from the reservoir into the bristle-bearing end of the carrier; the channel has at least one radial outlet orifice in the sidewall of the carrier. A slide valve member is guided sealingly in the interior of the channel. A closure member is adapted for hermetically closing the reservoir. A connecting rod extends substantially axially through the interior of the reservoir and connects the actuating device and the slide valve member to one another.

Abstract: A fountain brush having a bristle carrier and a set of bristles thereon, a handle attached to the bristle carrier and forming a reservoir for a liquid or pasty medium, and an actuating device, attached to the end of the bristle carrier, remote from the bristles and comprising an actuating press-member, which is attachable to the inner wall of the handle via compressible bellows means is described. A channel is provided leading through the bristle carrier from the reservoir to an outlet orifice between the bristles, and an obturating member which either closes the orifice or clears it for the discharge of the medium therefrom.

Abstract: A fountain toothbrush is described which comprises a bristle carrier having bristles, a handle containing a reservoir for liquid or pasty dentifrice, a duct leading from the reservoir to the bristles, and actuating means which urge the reservoir in a direction out of the handle. A piston has a passage connected to the duct and to the interior of the reservoir and a cylinder sleeve part is provided on the reservoir into which the piston protrudes. When the piston is pushed into the sleeve part towards the reservoir, dentifrice is conveyed onto the bristles.

Abstract: In a writing instrument comprising a writing core and an ink tank, the contact of the writing core with the ink in the ink tank is intercepted so that unnecessary loss of the ink due to evaporation from the core surface and excessive supply of the ink to the core are effectively prevented. Merely pressing the end portion of the outer case of the writing instrument allows a spring, a valve member and a flexible bellows portion of the ink tank to supply an appropriate amount of ink into the core.