Coating implements with material supply – Diverse coating tools
Reexamination Certificate
2000-08-04
2001-07-31
Walczak, David (Department: 3751)
Coating implements with material supply
Diverse coating tools
C401S141000, C401S142000, C401S222000
Reexamination Certificate
active
06267523
ABSTRACT:
BACKGROUND OF THE INVENTION
Gel inks have become quite popular for use in writing pens. In particular, gel inks may be made in pastel, neon and metallic colors that shine brightly from a piece of paper when used to write.
Ink pens employing pastel, neon or metallic colored gel ink are typically made with a single color of gel ink in the barrel of the refill.
Children need to be encouraged to learn to write and to use an ink pen in writing. The present invention encourages children to write with an ink pen because they are anxious to see the ink within the pen change colors as writing takes place.
SUMMARY OF THE INVENTION
The present invention relates to an ink pen refill with diversely colored gel ink layers and method of manufacture. The present invention includes the following interrelated objects, aspects and features:
(1) In a first aspect, the inventive ink pen refill consists of a single writing point such as, for example, a roller ball. Of course, other types of writing points may be employed. The writing point is connected to an elongated barrel in which the ink is stored.
(2) In the preferred embodiment of the present invention, the ink that is stored in the barrel consists of a gel ink. The gel ink is stored in the barrel in distinctly colored layers. Thus, for example, in a single elongated barrel, gel ink having consecutive colors, for example, yellow, orange, green, pink, blue and violet may be placed. The writing point is located at the distal end of the barrel. At the proximal end, just behind the most proximal color band of ink, a quantity of grease is inserted in the barrel to seal the ink therewithin. In the preferred embodiment, the grease is made of a material such as, for example, silicone grease or polybuden grease.
(3) In manufacturing the ink pen refill, after installing the elongated barrel on the proximal end of the writing point, a quantity of gel ink of a first particular color such as, for example, yellow is inserted within the barrel just proximal of the writing point using a filling pipe. When the desired quantity of yellow ink, for example, has been so inserted within the elongated barrel, the elongated barrel with the writing point affixed thereto is placed in a centrifuge and is centrifuged at a rotation speed of 700 to 900 rpms for a period of 50 to 70 seconds. During the centrifuging, any air bubbles contained within the ink are removed.
(4) Next, the next color of gel ink is dispensed into the barrel just proximal of the yellow ink using a filling pipe. After the desired quantity of ink has been dispensed into the elongated barrel, the entire refill with the writing point, elongated barrel, yellow ink layer, and new ink layer, for example, in an orange color, is placed in the centrifuge and the refill is centrifuged within the same speed range and for the same time duration described hereinabove to remove any bubbles from the newest layer of ink.
(5) This process is repeated over and over again until each of the six or more layers of uniquely colored gel ink have been dispensed into the elongated barrel. When the last color has been dispensed therein, a layer of grease, preferably silicone grease or polybuden grease, is inserted at the proximal end of the barrel to seal the ink layers in place.
(6) In order for the inventive process to work effectively, each of the gel ink layers is made of an ink having a specific gravity substantially the same as the specific gravities of the other layers. When this is the case, the ink layers will not intermix and bleed into one another as the filling process is conducted as described above.
(7) In an alternative method, one may fill the elongated barrel with a multiplicity of diverse colors by filling two colors for each centrifuging operation. Thus, for example, a filling pipe is employed to fill a quantity of yellow ink followed by a substantially equal quantity of orange ink. Once these two colors have been dispensed into the elongated barrel, they are centrifuged. The result is a single mixed color having aesthetically pleasing striations and marbling evidencing the existence of two separate colors therein.
Accordingly, it is a first object of the present invention to provide an ink pen refill with diversely colored gel ink layers.
It is a further object of the present invention to provide a method of manufacturing such an ink pen refill.
It is a still further object of the present invention to W provide such a refill having a multiplicity of diversely colored gel ink layers with a grease layer retaining the gel ink layers in place within the elongated barrel.
It is a still further object of the present invention to provide such a refill in which two colors are filled into the elongated barrel thereof for each centrifuging operation.
REFERENCES:
patent: 5306092 (1994-04-01), Jenq
patent: 5971643 (1999-10-01), Ahmed
Huang Sin-Hwa
Poels Edward John
Raymond Geddes & Company, Inc.
Spiegel H. Jay
Walczak David
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