Coating implements with material supply – Including ball – roller or endless-belt tool – Ball
Patent
1998-03-02
1999-08-17
Eloshway, Charles R.
Coating implements with material supply
Including ball, roller or endless-belt tool
Ball
401227, 401199, B43K 518, B43K 710
Patent
active
059383623
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a writing implement for ink in accordance with the preamble of Patent claim 1.
Such a writing implement is known from DE 34 21 417 A1. This publication presents a fountain pen in which a lamination system for holding or emitting ink is arranged in the front region of the shaft. An ink feed channel connected to an ink reservoir runs in a longitudinally extending lamination carrier from which transversely arranged and mutually spaced laminations, also referred to as lamination discs or lamination fins, protrude. Between these laminations, there is a capillary gap between the side of the lamination carrier which has the open side of the ink feed channel and the inner wall of the shaft, via which capillary gap ink may emerge from the ink feed channel into the intermediate space between the laminations. Over the substantial part of their circumference, the laminations themselves extend directly as far as the inner wall of the shaft. The lamination system prevents disruptions in the inkflow occurring as a result of pressure or temperature fluctuations in the reservoir vessel for the ink, in that excessive ink is taken up and emitted again when required.
Writing implements with lamination systems of similar design are described in DE 34 29 031 A1 and DE 90 06 540 U1.
In the previously known writing implements it is disadvantageous that the capillary nature of the gap in the contact region between the laminations and the inner wall of the shaft can lead to ink becoming permanently stuck in this region between the laminations and the inner wall of the shaft. In writing implements whose shaft is transparent in the region of the lamination system, this leads to a "dirty" appearance.
There are also writing implements in which the laminations maintain a greater distance from the inner wall of the shaft over their entire circumference. However, such lamination systems are less sensitive and, under unfavourable conditions, ink may drip out from the tip of the writing implement.
Therefore, the object of the invention is to provide a writing implement for ink which has a particularly effective lamination system for holding or emitting ink.
This object is achieved by means of a writing implement for ink having the features of Patent claim 1. Advantageous refinements emerge from the subclaims.
In the case of the ink writing implement according to the invention, the laminations of one group of transversely arranged and mutually spaced laminations between which laminations there is a capillary gap between the side of the lamination carrier having the open side of the ink feed channel and the inner wall of the shaft extend in a first region which is located in the region of the open side of the ink feed channel, in each case up to the inner wall of the shaft of the writing implement. In a second region, which faces away from the first region and extends over at least 80% of the circumference of the laminations, the laminations of the group each maintain a distance from the inner wall of the shaft which is of such a magnitude that a capillary effect is prevented.
This design of the laminations ensures that the ink in the area of the first region of the laminations of the group can pass without difficulty from the ink feed channel into the intermediate space between the laminations via the capillary gap from the inner wall of the shaft or can move back from this intermediate space into the ink feed channel, depending on the pressure and temperature conditions in the ink reservoir vessel which is connected to the ink feed channel. In the second region, the laminations of the group are each at such a large distance from the inner wall of the shaft that it is not possible for the ink to creep along the lamination edge there under the effect of capillary forces. The writing implement according to the invention has a lamination system which reacts very sensitively to pressure or temperature fluctuations in the ink reservoir vessel. The tip is thus reliably relieved of loading and the formation of droplets is p
REFERENCES:
patent: 2512004 (1950-06-01), Wing
patent: 4645367 (1987-02-01), Mutschler et al.
patent: 4671692 (1987-06-01), Inaba
patent: 5551789 (1996-09-01), Okawa et al.
Eloshway Charles R.
Rotring International GmbH & Co. KG
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