Abstract: A simple and economical construction and a reliable function is obtained for an ink container or ink pot with an ink reservoir by a closure coupling member that closes the ink withdrawal opening of the pot. The closure and coupling member has a capillary action for transporting ink. The pot includes an ink chamber with a capillary body so positioned inside the ink chamber that the open front face or first end of the capillary body is in direct contact with the ink while a back side of the capillary body communicates through a vent with the atmosphere. The chamber encloses the capillary body so that air can enter into the ink reservoir only through the capillary body to properly control the ink transport. For this purpose the capillary body functions as a pressure equalizer. The coupling member has a larger capillary action than the capillary body to make sure that ink is properly fed through the capillary coupling member to an ink consuming device.

Abstract: Recording or measuring equipment is provided with a spring clamp or clip for holding a replaceable writing unit by the ink reservoir of the writing unit. The reservoir carries a pen with a fiber or laminar tip and has a vent at or near the end shaped for insertion in the clamp or clip. A plug equipped with a gripping knob is inserted in the vent and the vent is so located that when the plug is so inserted, the ink reservoir cannot be inserted into and held by the clamp or clip, thus assuring that the vent is opened before the pen goes into use.

Abstract: A fibrous pen for recording instruments and the like comprises an ink supply container, at least one writing tube extending therefrom and a fibrous or lamella writing nib extending through the writing tube and from the free end thereof. The writing tube comprises an outer plastic tube and an inner deformable metallic tube. The deformable metallic tube permits the writing tube to be permanently bent to precisely position the end of the writing nib at a predetermined location.

Abstract: The disposable printing head assembly includes a printing head frame structure fitted with a plurality of printing tips or pens. The printing head frame structure includes a plurality of separate store chambers including store material for containing the color printing material. The color store material may be the same or of different colors from one chamber to the other. At least one printing tip is disposed in each color store chamber. The printing tips are formed with different printing symbols such as a point, cross, star or circle.