Writing point or tracing element

Details Writing point or tracing element Writing point or tracing element

1988-07-26

1990-07-03

Apley, Richard J.

Coating implements with material supply

Including stylus

Axially movable by pressure on work surface

401258, 401232, 401219, B43K 800, B43K 510

Patent

active

049386204

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a writing point or a tracing element for manual ink writing or drawing instruments or for plotter or similar automatic or mechanical tracing machines.
2. Description of the Prior Art
In the German utility model No. 1947 421 as well as in the CH-patent 451 745 such writing points are represented and described in their essential features. Even though it might be true that these known writing points already were rather safe against running-out and guaranteed a relatively even flow of ink, they do not satisfy the requirements of quality of nowadays any more. Especially in the case of work that has to be done very fast, respectively under high traction speeds [drawing speeds], for example in the case plotters or similar installations, the flow of the writing medium might be changed, or even cut off, and thus uneven or uncomplete lines can be caused. Besides, these writing points can run out relatively easily under strong oscillations of temperature or pressure and thus cause pollution in their environment, and later, when the writing mean possibly drys,--especially if the tracing ink in the ventilation--or balancing system dries, expensive works of maintenance can be made necessary.
Thus it is an object of the present invention to provide a writing point, respectively a tracing element, which even under very high working--or traction speeds guarantees evenly and completely drawn lines, respectively swabs and provides a relatively high safety against running out and thus virtually does not require any maintenance.


SUMMARY OF THE INVENTION

This task is resolved by a writing point or tracing element for manual ink writing or drawing instruments or for plotters or similar automatic or mechanical tracing machines, wherein the housing of the writing point is connected or connectable with a shaft. The shaft contains ink or india ink and serves as a holder and/or a storage space and a compensating system as well as further individual elements. The supply system includes in the area of the housing several spaces which all provide different capillarities, and which are disposed in an axial sequence, the capillarity increasing once or several times towards the writing body.


BRIEF DESCRIPTION OF THE DRAWING

In the drawing:
FIG. 1 shows an inventive writing point with a shaft,
FIG. 2 shows a cross section through the shaft according to line A--A in FIG. 1,
FIG. 3 shows a cross section through the shaft and the writing point according to line B--B in FIG. 1,
FIG. 4 shows a cross section through the shaft and the writing point according to line C--C in FIG. 1,
FIG. 5 shows the writing point pursuant to FIG. 1 without shaft,
FIG. 6 shows the writing point pursuant to FIG. 1 without shaft or inner parts,
FIG. 7 shows the tube insert pursuant to FIG. 1,
FIG. 8 shows the core insert pursuant to FIG. 1,
FIG. 9 shows another embodiment of the inventive writing point,
FIG. 10 shows a variant with a writing ball and
FIG. 11 shows a further variant with a writing wick.


DESCRIPTION OF THE PREFERRED EMBODIMENT

The writing point (1) shown in FIG. 1 is inserted into a shaft (40) and provides basically a housing (1'), a tube (1") as writing body which is inserted firmly into the housing, a sealing tube insert (20) which closes the channels of the compensating channel (64), and a core insert which is movable in the axial direction against the pressure of a spring (71).
The shaft (40) provides apart from the receiving space (41), into which the writing point (1) is screwed, a storage space (42) for the ink, india ink or for another liquid medium and thus represents the storage space for the writing means as well (cartridge, shell case or something of that kind).
The housing (1'), which is inserted sealing into the receiving space (41) with its circumferential surface, provides in its mantle surface an outer channel (66), which rotates several times, a compensating channel (64) running in the inner side in the shape of a spiral and a connecting channel (6

REFERENCES:
patent: 2681041 (1954-06-01), Zodtner et al.
patent: 3756733 (1973-09-01), Glasa et al.
patent: 3836266 (1974-09-01), Lorenz et al.
patent: 3859190 (1975-01-01), Kuelichen, Jr.
patent: 4461591 (1984-07-01), Mutschler
patent: 4522525 (1985-06-01), Saito et al.
patent: 4728214 (1988-03-01), Mutschler
patent: 4753546 (1988-06-01), Witz et al.

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