DE2012726A1 - Writing device - Google Patents

Description

DR. INO. E. HOFFMANN · DIPL-ING. W. EITLE DR. RER. NAT. K. HOFFMANN

PATENT LAWYERS

D-8000 MÖNCHEN 81ARABEUASTRASSEi 'TELEPHONE (0811) 911087 ΛΠ 19726

Penn Corporation, Princeton, N.J. United States

Writing implement

The invention relates to writing implements with retractable Writing tips.

Retractable screaming nib ballpoint pens have been in common use since their inception. There the "rotatably mounted" at the tip of a ballpoint pen Ball is usually very small, the tip itself must be made very narrow to fit the ball keep. Consequently, the Looh or the opening at

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The end of the clerkship through which the point extends should not be much larger than that Tip itself. When the tip of the ballpoint pen is withdrawn into the barrel, the ballpoint pen tip can do not come into contact with objects and contaminate them. Collect on repeated use in the meantime, paint and paper fibers adhere to the tip of the ballpoint pen and are applied to the edge areas of the barrel opening when the nib is withdrawn into the ballpoint pen. After a certain Time there is a relatively large mass of paint and paper fibers on the ballpoint pen shaft, making shirt and jacket pockets, the inside of wallets and other areas where pens are can be permanently soiled by paint

For some time now, fiber pens or felt-tip pens have been used for household and office purposes. Although the writing tips of these writing implements are relatively small or narrow compared to the felt-tip pens that have been used so far, they are nevertheless considerably larger than the tips of ballpoint pens. As a result, the cartridges of these felt-tip pens cannot usually be designed in such a way that they can be retracted in a similar way in ballpoint pens · A barrel in which cartridges of felt-tip pens could be withdrawn in the same way as is possible with ballpoint pens, would not reproduce the same, slender appearance of a tapered pen, which makes ballpoint pens stand out in their aesthetic appearance and making them easy to handle · The end of the shaft · would necessarily have a widened opening

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are equipped to hold the felt-tip pen tip. This shaft construction would be close to the pen objects in place against contamination Secure adequately · Since felt-tip pen tips are relatively are flexible «compared to conventional Ballpoint pens are even more dangerous that there is color on the opening edges of the shaft accumulates or settles. The fiber tips of these felt-tip pens also act as wicks, i.e. paint evaporates on them at great speed, if they are not covered. As a result, felt-tip pens are currently not included in the current design retractable tips fitted; instead, they are provided with removable protective caps that protect the Fountain pens used the same.

In contrast, the object of the present invention is to provide an improved writing implement with to create a retractable writing tip. The writing tip of the inventive writing instrument can through spreadable fingers are covered, while the fingers themselves are covered by the cap, so that the real Writing instrument can be held without touching the fingers.

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The present invention relates to a writing implement with a shaft through which a bore extends in the longitudinal direction; inwardly tapered fingers form a nose portion at one end of the shaft. A cartridge can be moved within the bore and is equipped with a writing tip and a system * or control surface · In this way, the cartridge can be moved from a retracted position to an extended position. In the back

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In the pulled or retracted position, the writing tip is protected within the shaft and by the pinger. In the extended position, the writing tip extends beyond the pinger, with the on the cartridge arranged control surface on the fingers comes to rest and this during the movement of the The cartridge spreads into the extended position before the writing tip emerges from the shaft to the outside. A cap is arranged on the shaft, surrounds the pinger and has an opening on the front side of the Part of the nose. Thus, the writing tip can move axially through the opening in the extended position of the cartridge extend.

The inventive writing instrument is provided with a shaft, within which one with a Nib equipped cartridge. At one end of the shaft are longitudinally extending Pinger arranged, which close each other and thereby the writing tip in retracted Completely cover and protect the location. A cap is attached to the shaft and surrounds it lengthways extending fingers so that the actual writing instrument can be held without touching these pingers can. The cap has an opening which is arranged axially in front of the writing tip. When the writing tip is in the extended position, part of the ink cartridge rests against the fingers of the shaft and presses this apart. The writing tip can thus extend outward through the opening over the end of the shaft extend in the cap to be used.

In the writing instrument according to the present invention, the writing tip, although relatively wide 1st, retracted or withdrawn and fully

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dig covered by the slim, tapered shaft will. In the case of the writing instrument according to the present invention, it is therefore impossible that After that, paint and paper fibers settle on the shaft the nib has been withdrawn repeatedly. The writing instrument is simple and straightforward to build and economical to manufacture. The invention is explained with reference to the accompanying drawings.

Figure 1 of the drawings is a side view of the Writing instrument according to the present invention.

Figure 2 is a front view of the writing implement with the nib retracted.

Figure 3 of the drawings is an exploded perspective view of the writing implement.

Fig. 4 is a partial sectional view taken on line 4-4 in Fig. 2; and

Figure 5 of the drawings is a fragmentary sectional view similar to Figure 4 with over the end of the shaft extended writing tip.

In the drawings, reference number 2 is a Writing implement shown, which has a shaft 4, an end cap 6 and a color cartridge displaceable in the shaft 4 having.

The shaft 4 is preferably made of a somewhat flexible plastic material and has a sloping body parts Io. Opposed to this is an axially extending, threaded end portion 12 at the upper end of the shaft 4 in front.

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seen. Reference is made to the position of the writing instrument, which it is during writing occupies on a horizontal plane. At the opposite, lower end is the body part Io with three upwardly extending elongated slots through which three longitudinally extending pingers 18 are formed. These run diagonally inwards and form a rounded one Nose part 2o on the shaft 4.

Immediately inside the nose part 2o is the body part Io in the form of a narrow one on the circumference running groove 22 undercut. In the groove 22 an elastic band 24 is fitted, which the Pinger 18 clamped facing one another so that the slots 14 forming the edges touch one another, if they are not on an obstacle. Slightly below the threaded end portion 12 is an upwardly extending annular shoulder 25 is arranged. The part of the shaft 4 which runs from the shoulder 25 to the nose part 2o, is designed to taper radially inward.

The shaft is provided with an inner, axially extending through the threaded end portion 12 and through the body part 12 extending bore 26 is provided. At the lower end, the bore 26 runs with the slope of the body part Io inwards and ends at shoulders 28, which are located on the inner surfaces of the fingers 18 are provided between the ends. Outside the shoulders 28, the fingers 18 are in the form of an axial extending recess J5o formed in the body part Io, which opens up into the bore 26.

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A tube-like cap made of Netall has an opening 32 at its lower end and an annular rim body 33 at the upper end. Slits Jk extending in the longitudinal direction are provided near the ring body 33 and are aligned in a circular position on the circumference of the cap 31. Starting from the edge body 33, the cap extends radially slightly inwards. The diameter of the inner surface of the edge body 33 corresponds approximately to the diameter of the outer surface of the shaft 4 directly above the shoulder 25. "

The cap 31 is fastened to the shaft 4 in that the edge body 33 is pushed up over the shoulder 25. The diameter of the shoulder 25 is somewhat larger than the diameter of the inner surface of the edge body 33 'so that the edge body 33 has to be pushed over the shoulder 25 with the application of force. The shoulder 25 is slightly compressed when the edge body 33 is pulled over it in the manner described with the application of force. After the edge body 33 has been pushed over the shoulder 25, the shoulder 25 lies radially outwards against the part of the cap 3.1 ah which has the slots 34. The pressure exerted by the shoulder 25 causes the shoulder 25 to deform in its shape, as a result of which parts of the shoulder penetrate into the slots 3 ^ and are pressed against the upper ends of the slots 3 ^. The cap 31 is secured against both a longitudinal and a rotary movement with respect to the shaft 4.

So that the shoulder 25 is deformed in the manner described, it is necessary that the shaft

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made of a somewhat elastic material Soft plastic materials such as polyethylene, polypropylene and butyrate have the desired elasticity. So can for example, a high density polyethylene serial number J506o from Eastman Chemical Corporation is used Find.

When the cap 31 is attached to the shaft 4, it surrounds the fingers 18 and encloses them; the ^ opening 32 comes to lie axially in front of the nose part 2o. The tapering of the cap 31 is less pronounced than that of the pingers 18 and of the nose part 2o, so that an area 35 between the outer surface of the fingers 18 and the inner surface of the cap 31 remains. The area 35 is large enough to allow a radial spreading movement of the fingers 18 within the cap 31.

Inside the bore 26 is a color cartridge 8, which has a limited axial movement between extended and retracted position within the bore 26 can perform. The color patron || ne 8 has a tubular container 36 with a arranged at the lower end, tapering control surface 37. This goes into an axially extending, End part 38 of reduced diameter, to which a fiber pin 39 is attached by means of a crank is. The fiber pen 39 extends axially over the end part 38 in the form of a writing tip 4o, which extends located within the recess 30 of the shaft 4, when the color cartridge 8 is in its retracted position. The contact or control surface 37 is located close to the shoulders 28 when the color cartridge 8 is in its shown in Fig. 4 of the drawings, to-

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withdrawn position. The situation of the tax ' surface 37 to the writing tip / the fiber pen 39 is like this dimensioned so that it comes into contact with the shoulders 28 before the writing tip 4o at forward in Shaft 4 moving color cartridge 8 the base or the closed end of the recess 3 © reached. the Tapering or inclination of the control surface 37 is like this chosen that they will with continued movement of the parb cartridge 8 the pinger 18 sufficiently expands or spreads, so that the writing tip is 4o over the spread Nose part 2o on the shaft 4 can also extend without to come or to have been in contact with the inner surfaces of the pingers 18 (FIG. 5). When the color cartridge 8 is in its fully extended position, the writing tip 4o extends outward the opening 32 in the cap 31. The cap 31 protects the pinger l8 to prevent dust or others Premdteile make the full closing movement of the fingers 18 impossible when the ink cartridge is in its retracted position Location is moved. The cap 31 also gives the writing instrument a smooth, even design, so that it is comfortable to guide and to use when in use hold is. The cap 31 also prevents the Fingers 18 get stuck on objects or get stuck in the open position.

At the opposite end of the tubular container 36 is an axially extending plastic compound existing stopper 44 is provided, which has a shaft 46 of reduced diameter. Below of the stopper 44, a collar 48 serving for holding surrounds the container 36. The collar 48 rests against it a coil spring 50, which also the container 36 surrounds. At the opposite end is the ' Helical spring 5o on a ring 52, which in turn on the upper edge body of the end part 12 of the shaft 4

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lies. The coil spring 50 therefore tensions continuously 8. the Parb cartridge in its retracted position. The container 36 is with a suitable color mixture filled, through which the fiber pin 39 is saturated or soaked.

The upper end of the ink cartridge 8 extends out of the bore 26, where it is received within the end cap 6, which forms an outer, uninterrupted continuation of the cap Jl. The end cap 6 (FIG. 3) consists of a body part 60 with a downwardly opening, lower bore 62 which serves to receive the upper end of the ink cartridge 8. The walls forming the lower end of the bore 62 are threaded and receive the threaded end portion 12 of the shaft 4. A pressure pin 80 is provided in the opposite end of the end cap 6 so as to be displaceable; An actuating mechanism 90 is arranged between the shaft and the pressure pin 80. Since the actuation mechanism 90 is of conventional construction, it is shown in phantom in Figure 3 of the drawings. When the pressure pin 80 is pressed down, the actuating mechanism 9 © acts on the shaft 46 and displaces the paint sleeve 8 axially within the bore 26 into its extended position. When the color cartridge 8 has reached its fully extended position, in which the writing tip 4o extends over the nose part 2o and the cap 31, the actuating mechanism 90 engages the end cap 6 and holds the color cartridge 8 in this position until the pressure pen 80 again is pressed or until the actuating mechanism 90 is acted upon in another way. When this is the case, the actuating mechanism So is released from the end cap 6 and enables the color cartridge 8 to be removed with the aid of the screw

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benfeder 5o moved to its retracted position will.

When the color cartridge 8 moves from its fully retracted position to its extended position moves, the control surface 37 comes into contact with the shoulders 26 and spreads the fingers l8 before the Writing tip 4o the base of the recess Jo (Fig. 4) has reached. Immediately above the control surface is a cylindrical surface part 91. The one that continues Displacement of the ink cartridge 8 has the effect that the shoulders 28 slide on the cylindrical surface part 91 and thereby keep the fingers 18 in the spread position (FIG. 5). Since the fingers 18 are spread in their Position, the writing tip 4o of the fiber pen 39 can be freely outward between the injected points Move fingers 18 through; it therefore extends over the outer end or the nose part 2o am Shank 4 and through the opening 32 of the cap 31. If the pressure pin 8o is pressed again so that the Helical spring 5o returns the color cartridge 8, occurs the reverse sequence of operations. The elastic band 24 supports the inherent elasticity of the plastic mass in order to to return the fingers 18 exactly to their closed position. This closure or this closed position is strong enough to prevent ink from evaporating from the nib 4o. It means that the Fiber pen 39 cannot dry out. In addition, the fiber pin 39 is completely protected, so that in. . Objects coming into contact with the end of the shaft 4 not be stained by paint. When the color cartridge 8 is in its retracted or retracted position is moved into the extended position, the fingers are kept at a distance from the writing tip 4o, so that do not accumulate paint and paper fibers on your fingers can.

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Claims (9)

Claims \ lj Writing implement with a shaft and a longitudinally extending bore through the shaft, in which at one end of the shaft inwardly P tapering fingers forming a nose part are arranged and a cartridge is displaceably aligned within the bore, which has a writing tip and has a control surface and is movable between a retracted position in which the writing tip is aligned within the shaft and covered by the fingers, and an extended position in which the writing tip extends axially over the fingers, characterized in that the control surface (37 ) is arranged on the cartridge in such a way that it spreads it against the fingers when the cartridge is moved into the extended position and before the writing tip emerges from the shaft that a cap (31) is arranged on the shaft which surrounds the fingers (18) and has an opening (32) located in front of the nose part (2o) t, and that the writing tip (4o) extends axially through the opening (32) when the cartridge (8) is in the extended position. 2. Writing implement according to claim 1, characterized in that a region (35) between Cap (31) and fingers (18) are in place to hold the fingers during the movement of the cartridge into the - 13 - 009886/1342 to be able to spread the extended position. 3. Writing implement according to claim 1 or 2, characterized geke η η ζ eich η e t _Λ that the cap is fastened at a point axially inside the fingers on the shaft and lies smoothly against its outer surface, and that the nose part (2o) of the shaft has a reduced diameter with respect to the remaining shaft part, so that a region (35) is formed between the nose part and the inner surface of the cap (31). 4. Writing implement according to claim 1, 2 or 3> characterized in that an upper end (33) the cap (31) rests on the shaft (4) and is attached to it is. 5. Writing implement according to claim 4, characterized in that the shaft is one after above extending, annular shoulder (25) has that the upper end of the cap has an annular rim body (33), the diameter of which is smaller is than the one of the shoulder and that of the Edge body over the. Shoulder is pulled to the cap to connect with the shaft. 6 * writing implement according to claim 5 * thereby g e k e η η ζ e i c h η e t that the cap (31) below the edge body (33) provided slots (34) has, and that parts of the shoulder into the slots penetrate-d rest against the upper ends to a To prevent loosening of the cap from the end of the stem. 7. Writing implement according to one of claims 1 to 6, g e k e η η ζ e lehnet * through an elastic - 14 009886/1342 Element (24) on the outside of the shaft (4), which rests against the outer surfaces of the fingers (18) this tensioned elastically and radially inwards. 8. Writing implement according to one of claims 1 to 7, characterized in that the fingers (18) are made in one piece with the shaft (4) and are formed by slots (14) at the end of the shaft. 9. Writing implement according to claim 8, characterized in that each of the fingers has one inwardly extending shoulder (28) between nose part (2o) and inner ends of the slots (14), and that the shoulder rests against the control surface (57) during the movement of the ink cartridge (8) into its extended position. 009886/1342