Coating implements with material supply – Including tool with blade-like – pad-like – or apertured... – With flow-regulator
Patent
1995-07-20
1998-05-12
Muir, D. Neal
Coating implements with material supply
Including tool with blade-like, pad-like, or apertured...
With flow-regulator
401206, 401177, 417472, B43K 518, B43K 500, F04B 4300
Patent
active
057496650
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an applicator for applying a suitable coating solution such as ink for writing instruments, an eye liner solution, a nail color solution, coloring materials, handwriting correction solution, adhesives and other various writing solutions and cosmetic solutions to a suitable member to be coated such as paper, a plastic film, glass, and metals. More particularly, the present invention relates to an applicator, or a kind of so-called "knock type valve structure applicator", which includes a valve comprising a valve seat and a valve disc normally in close contact with each other in such a manner as to cut off the outflow of a coating solution from a coating solution storage chamber and disposed between the coating solution storage chamber having a deformable wall capable of restoring its original shape and an application member so disposed at the front end portion of an applicator main body as to supply the coating solution retained by a capillary force to an article to be coated, and is designed so that the sealed state by the valve seat and the valve disc is released and the coating solution is allowed to flow out from the coating solution storage chamber when the deformable wall portion undergoes deformation by the pressing force applied to the deformable wall portion in such a manner as to reduce the volume of the coating solution storage chamber. Incidentally, among knock valve applicators, some have the structure wherein the volume change of the liquid storage chamber at the time of opening of the valve is practically negligible, but the applicator of the kind described above has the advantage that pressurization of the coating solution resulting from the deformation of the deformable wall portion to reduce the volume of the coating solution storage chamber can be used to promote the outflow of the coating solution from the liquid storage chamber. Therefore, the applicator is useful not only for applying the coating solution using dyes as coloring materials but also the coating solution using pigments as the coloring materials. The coating solution using the pigments can be effectively utilized for applying the solution to a non-liquid-absorbing surface of glass, metals, plastics or white boards by utilizing non-dyeability to the to-be-coated article, but has generally a higher viscosity than ordinary water-soluble dye ink such as fountain pen ink due to additives such as a fixation improving agent of pigment to the to-be-coated article and a dispersion stabilizer of the pigments in the solution. In other words, unless positively pressurized, the coating solution does not flow out smoothly in some cases from the coating solution storage chamber even when the valve is open.
BACKGROUND ART
An example of the applicator of the kind described above is disclosed in Japanese Utility Model Publication No. 55114/1982. The deformable wall portion is disposed as a contractile bellows portion at the rear end of the coating solution storage chamber and the valve disc is extended rearward to the inner wall side of this bellows portion. When the outer wall of the bellows portion is pushed forward to allow the coating solution to flow out, it is temporarily stored in the empty chamber, and this coating solution so stored is gradually consumed by the application member.
In this prior art device, the pushing pressure of the deformable wall portion not only elevates the internal pressure of the coating solution storage chamber but also invites the positive advance of the valve disc with respect to the valve seat. Accordingly, this device has the advantage that the valve can be opened without elevating the internal pressure of the coating solution storage chamber beyond a necessary level, but involves the following problems yet to be solved.
The first problem is the structure wherein the coating solution flowing out from the coating solution storage chamber due to opening of the valve is stored in an empty chamber. This structure is directed to supplying the coating solution to t
REFERENCES:
patent: 2774518 (1956-12-01), Greene
patent: 3281887 (1966-11-01), Raffe
patent: 4480940 (1984-11-01), Woodruff
patent: 4496258 (1985-01-01), Tanaka et al.
patent: 5439143 (1995-08-01), Brown et al.
patent: 5454658 (1995-10-01), Kato
Kato Naoki
Kawasaki Masayuki
Muir D. Neal
Pentel Kabushiki Kaisha
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