DE7735894U1 - FILLING PEN - Google Patents

Description

J.S. Staedtler Nuremberg, November 23, 1977

Kirchenweg 1O Pat-Hr / ms - P 67117

85oo Nuremberg

Fountain pen

The invention relates to a fountain pen with an exchangeable writing medium storage device, the writing device in addition to a writing tip has a shaft and a mouthpiece that can be screwed to this, and longitudinal grooves on the writing implement and on the writing medium reservoir and / or ribs are provided.

Such a fountain pen is known (DT-OS 22 55 534), in which longitudinal ribs are provided on the jacket, an ink cartridge and corresponding grooves are provided in the front part of the shaft. The task and purpose of this measure is to provide additional security or secure retention of the cartridge in the front part of the shaft. With such a connection between cartridge and writing instrument shaft, however, it cannot be avoided that the ink cartridge the rotary movement of the shaft as it is screwed to the mouthpiece of the pen.

However, it is precisely this rotary movement that occurs in various embodiments of writing medium stores or mouthpieces is extremely disadvantageous, since this often involves tiny pieces of material in particular Scrape off the locking pin of the cartridge.

In unfavorable cases, these small particles can adversely affect the capillary ink guide system of the fountain pen.

The object of the present invention is to create a fountain pen in which the writing medium store is rotated prevented when assembling the writing instrument with certainty

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and thus the susceptibility of the writing instrument to failure is reduced.

In contrast to the known prior art, in which it is precisely this mutual twisting in the connection area of the writing medium reservoir is forcibly brought about by the arrangement proposed here, the object set is thereby achieved according to the invention solved that the grooves and ribs running axially parallel in the receiving zone for the writing medium store on the mouthpiece and in the Plug-in area are arranged on the storage neck as an anti-twist device that acts in particular during assembly.

As a result of this measure, the writing medium store is already in place when the writing instrument parts are plugged together from the beginning interlocking grooves and ribs held against rotation, so that in particular when screwing the mouthpiece and shaft only the shaft on the mouthpiece - or vice versa, the mouthpiece on the shaft - can be rotated against each other, the writing medium storage but due to the abutment on the shaft or via an intermediate replacement memory only axially into the receiving zone of the mouthpiece is pressed in.

Since there is no rotational movement between the writing medium storage and the mouthpiece takes place, no material particles can accumulate. the possibly sharp edges of the inks or Scrape off the ink inlet channels of the mouthpiece and that Disrupt or even block the writing material control system. Especially when a cartridge is used as a writing medium storage device or a cartridge is used, the front locking zone of which is formed or reinforced by a central pin or shoulder, Via which, for example, a film shutter is destroyed by axial pressing, or which is located during the axial movement of the memory such a measure is special if it pushes it into this and thereby releases passages for the writing fluid advantageous, as this "increases the amount of material

t can result when screwing. f

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Advantageous refinements of the invention are set out in the subclaims described.

With the embodiment shown in claim 2 is a special effective axial rotation lock due to the utilization of the largest possible lever arm shown. Of course, the grooves and But ribs can also be arranged on the inner circumferential surfaces of the plug-in zones, if this is due to the structural design the connecting parts appear more appropriate.

According to claim 3, there is a particularly easy introductory connection, since this eliminates any possibly laborious pre-centering is required. The minimal twisting by a few degrees that may take place in the process does not lead to any material removal whatsoever. Due to the proposed arrangement of a relatively large number of grooves and ribs, their effectiveness is also ensured, if these anti-rotation parts have relatively small dimensions in their width and strength. In addition, this also making it easier to join the two parts.

In the embodiments according to claim 5, in addition to the axial rotation lock, a complementary or absolute sealing of the cartridge connection zone is provided achieved by the circumferential sealing approach in addition to the inner seal on the connecting pin of the mouthpiece. The ribs of the mouthpiece penetrate the edge area slightly into the sealing attachment on the memory and thus fix it completely non-rotating.

With the embodiment according to claim 6, an easy attachment Allows without additional centering work and facilitates the penetration of the ribs into the sealing approach.

The invention is explained in more detail below by way of example with the aid of some schematic representations:

Fig. 1 shows a fountain pen to which the invention is applied can be,

Fig. 2 shows a plan view of a writing medium store according to the invention ,

Fig. 3 shows a partial cross section through the memory of Fig. 2,

With

Fig. 4 shows a partial cross section through the mouthpiece of a corresponding writing implement,

and
FIG. 5 shows a top view of the mouthpiece according to FIG. 4

The fountain pen shown in Fig. 1 represents a known tube pen. In the same way, the invention Of course, also use with fountain pens or similar writing implements, provided replaceable cartridges or Refillable cartridges can be used as writing medium storage. In the figure, the fountain pen (1) consists essentially from the shaft (2), the mouthpiece (3), the writing medium storage (4) and the writing tip designed as a writing tube (5). The mouthpiece is connected to the shaft by the connecting thread (3o) and the connecting thread (2o). Inside the shaft there is an abutment (28) on which the writing medium store is supported. Instead of the ribs or a diameter graduation existing abutment can, however, to the same extent an additionally inserted further Writing medium storage, as is the case with fountain pens in general It is customary to provide the possibly arn rear closure part the shaft is supported.

Fig. 2 shows the exemplary embodiment of an inventive Writing medium storage (4) in plan view, the

Ribs (42) as flat beads on the outer circumferential surface (44) of the storage neck (43) are arranged and between them the grooves (41) serving to accommodate the counter ribs of the mouthpiece form. In addition, a ventilation surface (49) designed as a segment of a circle can be seen, which extends axially up to the sealing attachment (4o) is performed and together with a similar training on the connecting pin of the mouthpiece to escape the during This trapped air serves to build up the memory.

Fig. 3 shows a partial half-section of the writing medium store (4), which tapers over the sealing shoulder (4o) to the storage neck (43) and in the inner area of this transition point has a locking pin (46) connected to the memory via a film shutter. This locking pin is when inserted of the memory into the receiving bore of the mouthpiece by means of its pressure surface (48) from the connection pin of the mouthpiece pressed into the writing medium storage, whereby the film closure tears and releases the memory contents. On the outer The circumferential surface (44) of the storage neck are the axial ones Ribs (42) can be seen, their end faces (47) reaching up to the end face (45) at an angle of preferably 45 ° run bevelled, the grooves (41) lie between the ribs.

Fig. 4 shows a partial section through the connection area of the mouthpiece (3), which via the connecting thread (3o) or can be connected to the shaft via other connecting elements, for example via plug-in grooves, and between the outer wall and the connecting pin (36) forms the receiving bore (33) for the writing medium store. The connecting pin (36) points axially running writing medium channels (6) which extend to the pressure surface (38). As especially at the confluence points of this Writing medium channels in the printing surface can produce relatively sharp edges, precisely because of this there is a risk that these

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Edges of this material particles are scraped off when the writing medium reservoir is rotated or when the friction arises with the pressure surface of the locking pin, which can then penetrate the writing medium storage system and possibly interfere with it. The figure also shows up to the end face (35) - "calibrating ribs (32), the end face (37) of which here form two-sided inlet bevels. Between the ribs (32) there are the grooves (31), which are used to accommodate the mating ribs of the Serving writing medium storage.

FIG. 5 shows a plan view of the mouthpiece (3) according to FIG. 4, in particular the connecting pin (36) and the writing medium channels (6), the receiving hole (33), the outer peripheral surface (34) of this receiving hole as well as the ribs (32) and the grooves (31) lying in between are clearly visible. Further this figure shows a ventilation surface (39) on the connecting pin, as they are complementary to the corresponding ventilation area can be provided and designed on writing medium storage device to the compression of the air in the memory or in the filled writing medium control system of the mouthpiece and thereby the possible leakage of writing fluid in the area of the Safe to prevent writing tip when assembling. Especially when the storage neck is on both walls of the mounting hole rests relatively tightly over its entire axial length, the allocation of venting surfaces or grooves is advantageous.

The invention itself comes into play particularly when the writing medium store or its closure element is made of relatively soft material Plastic, such as polyethylene o.a., is made, as well as if, under certain circumstances, small sprue residues in the central area of the locking elements are present, which are twisted when twisting can easily solve.

7 -

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The ribs can have different cross-sectional shapes and, for example, as shown in Figures 2 and 5, rectangular on the memory and have a triangular, round or other cross-section on the mouthpiece.

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Overview of reference symbols

Fountain pen

shaft

Connecting thread (on the shaft) abutment (on the shaft)

20 28

Mouthpiece 3

Connecting thread (on the mouthpiece) 30

Grooves on the mouthpiece 31

Ribs on mouthpiece 32

Location hole (on the mouthpiece) 33

outer peripheral surface of the receptacle ".

hole on the mouthpiece ⁰ ^

End face of mouthpiece 35

Connection spigot (on the mouthpiece) 36

Face of the ribs on the mouthpiece 37

Pressure surface of the connecting pin 33

Vent surface on mouthpiece 39

Writing medium storage 4

Sealing shoulder (on the tank) 40

Grooves on memory 41

Ribs on memory 42

Storage neck 43

outer circumferential surface on storage neck 44

Front face on the reservoir neck 45

Locking pin (on the accumulator) 46

Front side of the ribs on accumulator 47

Pressure surface of the locking pin 48

Ventilation area on the cylinder neck 4 ^Q

Writing tip 5

Writing material channels

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Claims (6)

- 9 - j.S. Staedtler Nuremberg, November 23, 1977 Kirchenweg Io Pat-Hr / ms - P 67117 J d5oo Nuremberg Fountain pen claims 1. Fountain pen with exchangeable writing medium storage, wherein the writing implement has, in addition to a writing tip, a shaft and a mouthpiece that can be stolen with this verse "" and on Writing utensil as well as frictional medium storage longitudinal grooves and / or ribs provided ^ ind, characterized . that the grooves (31, 41) and ribs (32, 42) running axially parallel in the receiving zone for the writing medium storage on the mouthpiece (3) and in the plug-in area on the storage neck (43) are arranged as an anti-twist device that acts in particular during assembly. 2. Fountain pen according to claim 1, characterized in that the grooves (31, 41) and ribs (32, 42) each on the outer circumferential surface (34, 44) of the Receiving bore (33) of the mouthpiece (3) and the storage neck (43) are arranged. 1o - 7735894 03/02/78 - 1O - 3. Fountain pen according to one of claims 1 to 2, characterized in that there are ribs corresponding to the grooves (31) in the mouthpiece (3) (42) of the writing medium store (4) are opposite, the width of the ribs (32) of the mouthpiece being considerable can be narrower than the ribs (42) or than the grooves (41) of the writing medium store. 4. Fountain pen according to one of claims 1 to 3, characterized in that the Aufnalimebohrung daP (33) and the storage neck (43) have 3 to 8, preferably 5 to 7 ribs (32, 42) and grooves (31, 41). 5. Fountain pen according to one of claims 1 to 4, characterized in that the ribs (32, 42) in the mouthpiece (3) or on the writing medium storage (4) in their axial length up to the end faces (35, 45) of the receiving bore (33) or the storage neck and the grooves (41) on the storage neck (43) axially up to a circumferential sealing shoulder (4o) of the storage neck run. 6. Fountain pen according to one of claims 1 to 5, characterized in that the end faces (37, 47) of the ribs (32, 42) in at least one of the two parts are designed as inlet bevels on one or both sides are whose angle to the longitudinal axis is equal to or smaller is. 7735894 02.0178