DE2159942A1 - TUBE PEN WITH TWO TUBES ARRANGED COAXIAL INTO EACH OTHER - Google Patents

Description

Riepe factory (8738) 2 1599 A

2000 Hamburg 54
Kieler Strasse

Tube recorder with two coaxially arranged one inside the other

Writing tube

The invention relates to a tube writer with two coaxially arranged writing tubes, which are connected at the back with the ink or ink reservoir stand and of which the inner is at least limited in the axial direction in the outer movable, as well as with a Cleaning wire that protrudes into the inner writing tube and is attached with its rear end to a drop weight.

In a known tube writer of this type (DAS 1 246 465) the inner writing tube can be moved against the pressure of a spring in the axial direction in the outer writing tube, so that depending on the pressure exerted on the tube pen, either the inner writing tube or the outer writing tube is effective, i.e. this tube pen enables drawing with different line widths, which however cannot be changed continuously, but only in stages. Around

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to be able to draw or write with this known tube writer, it is necessary that he is in is held in a substantially vertical position so that the front surface of the respective writing tube on the writing pad rests on. In the case of an inclined position, as is customary with tube pens, there is a »writing or Cannot draw.

Many attempts have also been made to find a writing instrument to create that does not use a conventional nib, but has a nib that is completely symmetrical is, so that writing is possible with any rotation around the longitudinal axis and preferably also with an inclined position is. In one group of such known writing implements, a forwardly tapering, internally hollow writing tip is used used, which has openings in the front area, while the actual tip is closed. Which Laterally extending openings make it possible to write in a certain way while the device is held at an angle, but they can be found closed in circumferential direction between the individual openings Areas, which means that the line width is not completely independent of constant inclination a rotation around the longitudinal axis of the writing instrument, because once an opening can be made directly and another time a closed one Area between two openings on the writing surface rest. Particular difficulties arise

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With these writing tips, if you want to write or draw in an exactly vertical position, then the closed one Tip rests on the writing pad and especially if the writing pad is not flexible there is no connection to the openings -

Another difficulty with writing implements of this type is that the openings appear with ... drying out. Adding Indian ink or ink and then making the writing instrument writable again only with great difficulty can be.

In addition, since these known writing tips only have a large Such writing implements have so far not been able to gain acceptance.

With another known writing implement (DOS 1 5II 4o4) the writing tip is made up of leaf-shaped pieces connected by means of webs Approaches bent together to form a funnel-like element, so that then the outer ends of the approaches the form actual tip.

With this known writing tip, the actual tip must be welded or soldered, since otherwise the approaches bend up. Such processing is, however, due to the small size dimensions and the required accuracy

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very difficult to get to.

In the case of another type of writing instrument, for Indian ink or ink, which should also enable writing in the inclined position, is in the hollow writing tip, which tapers towards the front a central opening is provided into which a more or less movable pin protrudes (.DOS 1 76I 162) or protrudes from it (DAS 1 237 926). However, this results in principle the same difficulties as with the other known writing implements, because if the writing implement is placed vertically and thus rests on the tip of the pen, writing is generally not possible at all, while with the pen pushed in, writing is carried out with the line width prescribed by the central opening. If the pin cannot be moved, so it can either not be in a vertical position or only to a very limited extent with an inclined position Writing instrument can be written or drawn.

In contrast, the object of the invention to provide a tube Schreiber ™, which is writable both in vertical and in an inclined position and preferably allows ά jerk dependent write.

This object is achieved according to the invention with a tube pen of the type mentioned at the outset in that the interior of the outer writing tube is frustoconical at the front end

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is widened and that the outer wall of the inner writing crown a correspondingly frustoconical enlarged front area having a rounded end face.

Thus, the tube pen according to the invention has two ink or ink dispensing areas, one of which is the central opening of the inner writing tube and the other of which is between the frustoconical front end of the outer writing tube and the correspondingly enlarged frustoconical The front area of the inner writing tube is formed annular gap. Therefore, the tube writer can be in a vertical position be used, in which he then dispenses ink or Indian ink through the inner writing tube, while in general in the case of an inclined position a combined delivery of writing fluid takes place through the inner writing tube and the annular gap.

Preferably both the outer wall of the outer writing tube are rounded in the area of the front end and the front end surface of the inner writing tube, so that for example a part of a ball is created and enables smooth and non-scratchy writing or drawing in all possible writing positions will. In this training, the frustoconical Extension of the annular gap preferably perpendicular to a tangent to the spherical surface in the area of the annular gap.

Since the inner writing tube can be moved to a limited extent in the axial direction and preferably also somewhat transversely to the longitudinal axis it shifted slightly when it was placed on the writing surface, so that

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especially when the writing instrument is in an inclined position, the thickness of the annular gap in the support area depends on the applied pressure is changed and thus pressure-dependent writing is possible. ·.

The inner tubes can be used in a wide variety of ways be held displaceably in the outer writing tube. A very simple attachment results when that rear end of the inner writing tube is widened so that it forms on a rear stop surface Shoulder of the outer writing tube.

The invention is explained in more detail below with reference to the figures showing an exemplary embodiment:

Figure 1 shows a pen tip in a side view

for a tube pen according to the invention. Figure 2 shows schematically a partial section through the front area of the pen tip according to the figure

The pen tip shown in Figure 1 consists of one outer body, which has an interior space in communication with the ink or ink reservoir, in which a falling weight 4 is arranged. This drop weight is movable at least in the axial direction and carries on its front End a cleaning wire J5 (Figure 2) that goes into the interior Writing tube 1 protrudes. The drop weight is by one

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Bracket 6 secured against falling out in a known manner.

In addition, a compensation chamber 5 is provided on the outer surface of the body, which is in the area of the fastening thread runs for the pen tip and in the upper part with the ink storage space or the interior of the body and in the lower part with the surrounding air. The mode of operation and function of such a compensation chamber is known.

In the front of the body of the pen tip, an outer writing tube 2 is inserted, which cannot be moved. The inner writing tube 1 is located coaxially in this outer writing tube 2. Both writing tubes are in place at the back in connection with the ink or ink storage room.

As can be seen in Figure 2, the interior of the outer writing tube 2 at the front end 8 frustoconical expanded, and the front area 7 of the inner writing tube 1 is correspondingly frustoconical, so that in this area between the inner and outer writing tube an annular gap is formed. This annular gap 11 is above the annular space between the inner and outer writing tube in connection with the ink or ink storage room .

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As can be seen without further ado from FIG. 2, the interior Writing tube 1 can only be moved backwards to a limited extent in the axial direction, since the frustoconical extensions come into contact with each other in the front areas. The axial movement of the inner writing tube 1 forward is made by a widening provided at the rear end. limited that in contact with a shoulder-shaped extension 9 of the outer writing tube 2 comes. The assembly of the inner writing tube is done simply in such a way that one insert the small writing tube, which is initially not expanded at the rear end, into the outer writing tube 2 and then widens the rear area.

The outer wall in the area of the front end 8 of the outer writing tube and the end wall of the inner writing tube 1 in the area 7 are rounded so that they form the shape of a partial sphere with approximately the same radius of curvature. This partial sphere is particularly suitable as a writing tip, as it can be moved smoothly over a writing pad without scratching.

If the tube pen is used for writing or drawing in a vertical position, the ink or Indian ink flow only through the central bore of the inner writing tube 1, and the tube writer works like that a conventional tube writer. In this operation, the inner writing tube is also in the axial direction

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moved back, so that on the one hand the widened area 10 comes free of the surface 9, so that ink or Indian ink in the annular space between the inner and outer writing tube can flow, while on the other hand through the movement of the inner writing tube dried up ink or Ink particles dissolved in the ring room mentioned and the Writing fluid supply to the annular gap 11 is ensured.

If the tube pen is used in an inclined position, "comes." generally the area between the longitudinal axis and the annular gap in contact with the writing surface, which is the case with ainer somewhat resilient pad leads to both writing fluid from the annular gap and from the central hole gets on the writing pad. The strength of the annular gap in the delivery area is determined by the pressure on both inner writing tubes movable axially as well as somewhat transversely to the longitudinal axis influences, i.e. the ink resp. Ink delivery through the annular gap depends on the pressure exerted.

The tube pen according to the invention is also capable of writing if the inclination is increased so much that it only rests in the area of the annular gap and no ink or Indian ink from the central hole of the inner writing tube is available. In this case, too, isfc the line width depends on the amount of pressure exerted.

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Thus, the tube pen according to the invention is a writing instrument that can be used both in a vertical position can also be used in an inclined position with any rotation around the longitudinal axis and pressure-dependent writing or drawing, as is otherwise only possible with a pen holder.

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Claims (1)

Expectations fl.JRörchenschreiber with two coaxially arranged one inside the other Writing tubes that are connected to the back of the ink or ink reservoir and of which the inner one . at least in the axial direction limited movable in the outer is, as well as with a protruding into the inner writing tube, attached with its rear end to a drop weight Cleaning wire, characterized in that the interior of the outer writing tube (2) is at the front end (8) is widened frustoconically and that the outer wall of the inner writing tube (1) has a correspondingly frustoconical enlarged front area (7) with a rounded Has end face. 2. Tube pen according to claim 1, characterized in that the outer wall of the outer writing tube (2) in the area of the front end (8) is rounded corresponding to the front end surface of the inner writing tube (1). 5. Tube pen according to claim 2, characterized in that that the outer wall of the outer writing tube (2) in the region of the front end (8) and the front end surface of the inner Writing tube (1) have the shape of partial spherical surfaces. 309824/0528 4. Tube pen according to claim 2 or 3, characterized in that that the frustoconical surface of the inner and outer writing tubes (1,2) each perpendicular one at the front end of the frustoconical surface applied to the rounded end surface or to the outer wall -Tangent stands. 5. writing tube according to one of claims Ibis 4, characterized characterized in that the axial movement of the inner writing tube (1) on the one hand by the frustoconical surface at the front end (8) of the outer writing tube (2) and on the other hand, is limited by a rear stop surface (9). 6. tube pen according to claim 5 *, characterized in that when resting on the rear stop surface (9) the front, rounded one End of the inner writing tube (1) a little over the rounded outer wall of the outer writing tube (2) protrudes. 7. tube pen according to one of claims 1 to 6, characterized in that that the inner writing tube (1) can be moved transversely to the longitudinal axis in the outer writing tube (2). 8. tube pen according to one of claims 1 to 7 * characterized in that that the rear end (10) of the inner writing tube (1) to rest on the rear stop surface forming shoulder (9) of the outer writing tube (2) expanded Ik t. 309874/0528 BAD ORfGINAL