Ruling pen

A ruling pen is a drawing instrument for drawing with ink or with other drawing fluids, it is design for drawing lines and signs on paper with ink or paint. Originally used for technical drawings in engineering and cartography together with straight rulers and French curves, it is today used for specific uses, such as picture framing or calligraphy.

Ruling pen, is a dip pen for cartography or manga. The shape of a duckbill pen is similar to that of a compass on the side of a compass. The principle is the same as that of most dip pens, and the ink is saved through a certain gap. The width of the nib is fixed by an adjustable screw, so if the width is set in advance, the duckbill pen can draw a fixed width of the line. The disadvantage of duckbill pen ink is very troublesome. However, with the popularization and application of computer technology, most designers now use computer-aided design instead of manual drawing with a duckbill pen.

In general, the Ruling pen is used to draw the border in the comics, as well as tracing drawings, inking, etc. in the drawings. Duckbill pen for drawing a straight line, combined with compasses can draw a thin circle. Slightly diluted with paint scraping duckbill nozzle, adjust to the appropriate thickness, and then combined with a ruler or compass to draw a straight line or circle.

A ruling pen contains ink in a slot between two flexible metal jaws, which are tapered to a point. It enables precise rendering of the thinnest lines. The line width can be adjusted by an adjustment screw connecting the jaws. The adjustment screw can optionally have a number dial.

You can work by hand, mainly with artistic design work, and also with the help of a special ruler with a protrusion that prevents the carcass from leaking under the ruler, the circular, the templates. In addition to drafting, the Racefighter is also used for calligraphy.

Operating principle:
Duckbill nib is two very hard metal sheet, under natural conditions will expand to both sides.
Screw nib to expand efforts to suppress the pressure, to achieve balance, so the nib width is very stable.
The general use of brush or blade to duckbill pen ink. Ink will flow out at a fixed width tip. As long as the width is set in advance, the duckbill pen can draw a fixed width of lines, but if the ink is too dirty, it may rub out unnecessary lines.

The draw-line is a drawing instrument designed to draw, with ink or liquid color, rectilinear or curved lines of very precise thickness. It consists of two parallel metal branches of more or less tapered shape, flat on their inner face, and secured to their middle by a set screw. This set is extended by a thin cylinder of wood, plastic or metal, or even bone, which allows the handling in the manner of a pencil.

By turning the adjustment screw, the ends of the branches are moved closer together or apart, which makes it possible to fix the thickness of the desired line. Ink (mostly Indian ink) or liquid color (gouache or suitably diluted acrylic) is deposited between the two branches, by means of a pipette, a brush, or tanks designed and marketed filled to facilitate this operation. Finally, trace the edge of a ruler or a square, or possibly a gun (to draw curved lines). The line puller is not used by a show of hands.

Drawing in the drawing, the drawing is completed, you need to use a pencil in accordance with the different types of paper deep drawing, and check for errors, omissions and so on. Patterns often need to be copied, so some drawings to be finished after the ink, and some need to use a tracing paper in the pencil drawing on the map. Inking and drawing are used duckbill pen. This process should be careful not to drop the ink on the drawings, clothes or tools do not touch the dry ink lines, so as not to dirty drawings. Draw the wrong line or ink stains, the ink to be dry with a blade to gently scrape it off. If you need to repaint in place, the first place in the scraping of the fiber flattening, and then gradually accumulated with the thin line into the required thickness to avoid running ink. In addition, prepare a damp cloth (or foam sponge). When the duckbill pen ink is not easy to flow out, you can draw on the wet cloth, you can continue drawing lines. If the ink between the two leaves has dried up, use a damp cloth to wipe it clean before use.

Line pulls can be adapted to compasses or balusters, so as to draw circles or arcs. Specific compasses are also designed on the same principle. Pull-lines were often part of kits or boxes containing various tools needed for technical drawing.

There are several forms of line pullers, depending on the use that is made of them: fine for technical drawing, thick and wide for decoration. On some, one of the branches can pivot on the axis of the adjustment screw for easy cleaning.

The line puller has been used in technical and industrial drawing, in architectural drawing, and in all artistic disciplines that require rigorously rectilinear or circular features. It has been supplanted in the technical fields by tubular point pens with standardized line thickness, which are giving way to computerized numerical drawing or computer-aided drawing. However, it remains irreplaceable for certain applications, for example to draw colored lines on already colored supports, as in the art framing.

In the Soviet Union film “Office Romance”, the Ruling pen is mentioned by the secretary Vera as a tool that can be used (for lack of tweezers) for plucking eyebrows, later became a joke.