Mitsubishi Pencil Company, Limited

Casio Computer Co., Ltd.

Mitsubishi Pencil Kabushiki Kaisha

Toshimi Kamitani

Yasunari Kabasawa

Yoshihisa Suda

Takahiro Osada

Kunitaka Yamada

Kouji Nishimura

Kiyoshi Fujisawa

Hiroyuki Okuyama

Hirotake Izawa

Tooru Nakajima

Satoru Banzai

Yosuke Setagawa

Tadashi Kouriki

Mitsuhiro Kawabata

Kozi Nishimura

Yugo Matsuda

Chihiro Mochizuki

Hitoshi Kino

Masahiro Suzuki

Takao Koyama

Naohiko Moriya

Kei Oomoto

Yukinori Sawa

Yoshiharu Namiki

Kazuhisa Kirita

Yasuaki Ogiwara

Kouichi Hirano

Takanori Suzuki

Kaito Tsukada

Akihiro Nakada

Toshihiro Takahashi

Wataru Sagawa

Yasunari c/o IntellProperty Dept Casio Computer Co Ltd Kabasawa

A writing instrument in which condensation does not occur in a cap even though the writing instrument is equipped with the cap and which has high writing instrument quality and commercial value. The writing instrument includes at least a barrel in which an aqueous ink is contained; a pen tip provided on a tip side of the barrel and capable of discharging the aqueous ink; and a cap that is removably attached on a pen tip side of the barrel, wherein the aqueous ink has a vapor pressure of 10.3 to 12.3 kPa at 50° C.

Writing instrument

Provided is a writing implement that maximizes the effective area of a viewer portion allowing visual recognition in the writing direction and that facilitates writing at a high level, at the same time. This writing implement is a writing implement A, including for example, a pen tipthat feeds ink from a writing implement bodyand has a viewer portionallowing visual recognition in the writing direction. The pen tipis comprised of, at least, a writing partand a retainerhaving the viewer portion, an ink feeder portionfor feeding the ink from the writing implement bodyto the writing part. The minimum width X of the viewer portionis 3.7 mm or greater and a length Y of the viewer portionis 7.4 mm or greater. The ink feeder portionis arranged on one side of the viewer portion. Specifically, the ink feeder portionis preferably adapted to be positioned on a near side during writing (on such a side that the pen tipis located on an obtuse angle side of the ink feeder portion).

Writing implement

An applicator is provided with a container containing an application liquid, an inner plug arranged to close the mouth of the container and opens the valve against the biasing force of a spring member to allow the application liquid in the container to be discharged, and the application member arranged to cover an application liquid outlet of the inner plug and enable the application to the application surface by exuding the application liquid discharged through the inner plug. The application unit with the inner plug has a liquid flow passage that provides a flow resistance to the application liquid from inside the container to the application unit, and the total pressure loss per 1 m/s in the liquid flow passage is equal to or more than 1×10Pa·s and less than 1×10Pa·s or less.

Applicator

This application is related to a fiber-bundled part for writing instruments having excellent strength and durability, as well as a pen tip and a writing instrument using the fiber-bundled part, which can be suitably used for pen tips, ink feed cores and relay cores of writing instruments such as marking pens and felt-tip pens. The fiber-bundled part for writing instruments of the present disclosure is used for the ink feed core leading to the pen tip or a writing pen core, and comprises a multifilament of long fibers having different melting points, and the multifilament at least contain crimped fibers.

Fiber-bundled part for writing instruments, and pen tip and writing instrument using the fiber-bundled part

A writing implement having a pen tip that can achieve excellent ink outflow performance and an increase in the effective area of a viewer portion allowing recognition of the writing direction, relative to the whole pen tip. The writing implement is a writing implement A which includes a pen tipfeeding ink from a writing implement bodyand having a viewer portion through which the writing direction can be recognized, and is characterized in that the pen tipis configured of, a least, a writing partand a holding bodyhaving a viewer portion, and the holding portionhas a sheet-shaped ink feederformed with slits or bumps on the surface and inside thereof to produce a capillary action.

Provided are an erasing member which is excellent in erasability for handwritings written by means of a pencil, a mechanical pencil and the like and which does not produce eraser dusts, and an erasing tool in which a part to be erased can be visually recognized in erasing.The erasing member comprises a blend composition containing a liquid-absorbing porous material, and a basic magnesium carbonate porous material and the like can be used as the liquid-absorbing porous material. And in an erasing tool in which an erasing part is formed at one end and in which a transparent or translucent visible part making it possible to visually recognize a writing surface is provided in the vicinity of the erasing part, the erasing member described above is mounted to the erasing part, whereby the erasing tool which does not produce eraser dusts is obtained.

Erasing member and erasing tool using the same

To provide a writing instrument capable of further improving durability of a writing nib without impairing writing performance even when writing is performed with a heavy writing load. A writing instrument A having a writing part formed of at least a writing nibmade of a porous body and a retainermade of a hard material, in which the protrusion amount of the distal end of the writing nibfrom the retaineris 0.65 mm or more and 1.05 mm or less and/or 40% or more and 65% or less of the thickness of the writing nib

Provided is a writing instrument suited to ballpoint pens, marking pens and the like in which a flow pressure of an ink applied to a pen tip is controlled to a fixed level to prevent an ink direct flow phenomenon reverse flow phenomenon. The above writing instrument comprises a pen tip disposed at a front part of an ink tank, an ink received in the ink tank, a follower filled at a rear part of the ink, and a capillary porous member provided with a capillary force, which is arranged at a space part between a rear part of the follower and a rear end part of the ink tank in a state in which the follower is filled, wherein the pen tip is sealed when a cap is put on the writing instrument.

In order to provide a writing instrument applicable to an applicator, in which a writing or applying direction can be visually recognized in a broad range at a visual part of a tip, the writing instrument is endowed with a constitution in which a tip is equipped with a porous member as a writing part and a holding member holding the above porous member and having at least one liquid guiding part for feeding an liquid to the writing or applying part, which comprises a relay porous member for feeding a liquid contained in a instrument main body to the liquid guiding part provided in the holding memberand in which the holding member is a visible part wherein an area ratio of the above visible part on the front or side face is 40% or more of the tip protruding from a tip part.

In order to provide a writing instrument in which a writing direction can be visually recognized in a broad range at a visual part of a pen tip and which can surely write to end of writing, the writing instrument is endowed with a constitution in which a pen tip is equipped with a porous member as a writing part and a holding member holding the above porous member and having at least one ink guiding part through which an ink contained in a barrel is provided to a writing part held by the holding member which is a visible part enabling to visually recognize a writing direction, wherein an area ratio of the visible part is 40% or more of the pen tip protruding from a tip part of the writing instrument.

A fuel container includes a container body having a fuel discharge port and an interior spacing. A body of liquid fuel is filled in the interior spacing of the container body. Follower units are provided in the container body, in contact with at least a part of an end of the body of the liquid fuel. Solid follower auxiliary members are interposed between the follower units and the body of liquid fuel to be optically detectable.

Fuel container, fuel residual amount measurement device, and fuel residual amount measurement method

In order to provide a thermosensitive decolorable ink composition which can readily be decolored with simple heating by rubbing and the like without using a microcapsule and is not developed again in color even after stored at very low temperature (&#x2212;50&#xb0; C. or lower) and which is excellent in stability with passage of time and has a vivid hue intensity, the above thermosensitive decolorable ink composition is provided with a constitution in which it contains as a colorant, color developing particles comprising at least a leuco dye, a developer and a crystalline substance and in which it further contains a decolorant comprising an amorphous resin.

Thermosensitive decolorable ink composition

A fuel containercomprises: a container main bodyin which a liquid fuelis housed and fuel exhausting portsandto exhaust the liquid fuelto the outside is formed; a following auxiliary memberwhich is solid, and situated on an end side of the liquid fuelin the container main body, the following auxiliary membermoving to the sides of the fuel exhausting portsandas the liquid fuelis exhausted; and a following bodysituated on the end side of the liquid fuel, and packed in a space formed by an inner peripheral surface of the container main bodyand an outer peripheral surface of the following auxiliary member, the following bodymoving to the fuel exhausting portsandas the liquid fuelis exhausted. Then, at least one of the inner peripheral surface of the container main bodyand the outer peripheral surface of the following auxiliary member, which are faced to each other, is made to be uneven.

Fuel container

The fuel reservoir for a fuel cell is a fuel reservoir detachably connected with a fuel cell main body, and it is equipped with a fuel-storing vessel of a tube type for storing a liquid fuel and a fuel discharge part; the fuel discharge part is provided with a valve for sealing communication between the inside and the outside of the above fuel-storing vessel; and a follower which seals the liquid fuel and moves as the liquid fuel is consumed is disposed in the rear end part of the liquid fuel stored. The valve assumes a structure in which a slit is formed in an elastic material and a structure in which a valve member is pressed by a resilient body.

Fuel reservoir for fuel cell

Provided is a fuel cartridge in which a follower is prevented from being deformed and from separating even when heavy vibration is exerted onto the fuel cartridge. The fuel cartridge is detachably connected with a fuel cell main body and assumes a construction in which the fuel cartridge is equipped with a fuel-storing vessel for storing a liquid fuel, a fuel discharge part, and a follower which seals the liquid fuel and moves as the liquid fuel is consumed at a rear end part of the liquid fuel. The follower is provided with a follower auxiliary member and a cap member both of which have no fluidity and are insoluble in the liquid fuel.

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Fujioka, Japan

Toshimi Kamitani