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1. 发明公开

EP4375085A1 MECHANICAL PENCIL 审中-公开
公开(公告)号：EP4375085A1
公开(公告)日：2024-05-29
申请号：EP22845813.9
申请日：2022-07-11
申请人： Mitsubishi Pencil Company, Limited
发明人： FUKUDA, Takamasa , KOIZUMI, Yusuke
IPC分类号： B43K21/16 , B43K21/033
CPC分类号： B43K21/033 , B43K21/16
摘要： A mechanical pencil 1 comprising a ball chuck 11, a rotation drive mechanism 30 having a rotary part 40, a feedout cam face 54 having a step part 55 in the axial direction, an input member rotating upon receiving a rotational drive force of the rotary part, and an output member having an abutting part 65c abutting against the feedout face and a slider 9 provided with a holding chuck 10 holding lead 7, configured so that the abutting part moves along the feedout face corresponding to rotation of the output member and so that advancing motion of the slider when the abutting part drops into the drop difference causes lead held by the holding chuck to be pulled out by the ball chuck, and further comprising a clutch mechanism transmitting rotational movement of the input member to the output member so that when the input member rotates by exactly a first rotational angle, the output member rotates by exactly a second rotational angle smaller than the first rotational angle.

2. 发明公开

EP4306601A1 OILY INK COMPOSITION 审中-实审
公开(公告)号：EP4306601A1
公开(公告)日：2024-01-17
申请号：EP22766849.8
申请日：2022-02-24
申请人： Mitsubishi Pencil Company, Limited
发明人： IKAI, Takayuki
IPC分类号： C09D11/17 , B43K8/00
摘要： This oily ink composition comprises propylene glycol monomethyl ether, a resin, a hydroxy acid ester having a boiling point of 150°C or higher, a co-solvent, and a vapor-deposited aluminum pigment of a leafing type, wherein the resin can dissolve in the co-solvent and the co-solvent has a higher boiling point than the hydroxy acid ester.

3. 发明公开

EP4265432A1 REPLACEMENT LEAD CASE 审中-实审
公开(公告)号：EP4265432A1
公开(公告)日：2023-10-25
申请号：EP21906689.1
申请日：2021-12-16
申请人： Mitsubishi Pencil Company, Limited
发明人： KAWABATA Mitsuhiro , NAKAMURA Kyoichiro , FUJISAWA Kiyoshi
IPC分类号： B43K19/14
摘要： Provided is a replacement lead case that makes it possible to easily extract a required replacement lead without directing a lead extraction port downward and solves the problem that many replacement leads simultaneously fly out from the case. This replacement lead case is provided with: a case body 2 that forms an inner space surrounded by a rear face plate 2a and right and left leg plates 2b as a replacement lead accommodation room 2c and has a lid body part 2e on a tip end side thereof and a case part 2f on a rear part side thereof via a bendable thin part 2d provided on the rear face plate; and a cover member 1 that has a U-shaped cross-section orthogonal to a longitudinal direction molded by a front face plate 1a and right and left outer leg plates 1b, covers the replacement lead accommodation room on a case body side with the front face plate, and slidably supports the case body in the longitudinal direction with the leg plates of the case body positioned on the inside of the outer leg plates. A rail-shaped guide body 2j is formed on the lid body part 2e along the longitudinal direction, and the cover member is provided with a sliding body 1g that contacts the guide body. (216 Words)

4. 发明公开

EP4230427A1 PENCIL LEAD 审中-实审转让
公开(公告)号：EP4230427A1
公开(公告)日：2023-08-23
申请号：EP21879928.6
申请日：2021-10-05
申请人： MITSUBISHI PENCIL COMPANY, LIMITED
发明人： ARAI Hiroyuki , KUBO Ryota , MATSUMOTO Masaaki
IPC分类号： B43K19/02 , C09D13/00
摘要： A pencil lead that can achieve high levels of both improved density and improved fixability of a hand-drawn line and is also less likely to stain a hand during writing. Examples of this pencil lead include a pencil lead comprising a black porous fired lead body including at least graphite, wherein at least a compound selected from octyldodecyl erucate, oleyl oleate, octyldodecyl oleate, isopropyl palmitate, 2-ethylhexyl palmitate, and propylene glycol monooleate is impregnated in pores of the porous fired lead body. The pores of the black porous fired lead body are preferably impregnated with at least one selected from a terpene phenolic resin, a rosin ester resin, a ketone resin, and a rosin-modified phenolic resin, in addition to the compound.

5. 发明公开

EP4141076A3 COLORING TABLET AND WATER-BASED INK COMPOSITION FOR WRITING INSTRUMENT USING THE SAME 审中-实审转让
公开(公告)号：EP4141076A3
公开(公告)日：2023-04-05
申请号：EP22189249.0
申请日：2022-08-08
申请人： MITSUBISHI PENCIL COMPANY, LIMITED
发明人： Mizoguchi, Tatsuya , Ikai, Takayuki
IPC分类号： C09D11/16 , C08J3/20
摘要： Problem:
To provide a coloring tablet having excellent solubility and redispersibility and a water-based ink composition for a writing instrument.
Resolution:
A coloring tablet containing at least a colorant and a dispersing agent: The dispersing agent is selected from the following Group A:
Group A: a hydroxide neutralization product of an (meth) acrylic resin, a hydroxide neutralization product of a styrene-maleic acid copolymer resin, a polyoxyethylene-based surfactant, an alkyl condensed ring sulfonate, an amine ethylene oxide propylene oxide adduct, and a isobutylene-based polymer.

6. 发明公开

EP4105286A1 COMPOSITE COLORED PARTICLE 审中-实审转让
公开(公告)号：EP4105286A1
公开(公告)日：2022-12-21
申请号：EP22177970.5
申请日：2022-06-08
申请人： MITSUBISHI PENCIL COMPANY, LIMITED
发明人： OGURA, Kosuke
IPC分类号： C09D11/17 , B43K7/01 , B43K8/02 , C09D17/00
摘要： [Object] To provide an ink composition having excellent dispersion stability and writing performance.
[Resolution Means] Provided are a composite colored particle including a resin particle carrying a positive electric charge on a particle surface, a colored particle carrying a negative electric charge on a particle surface, and a low-density particle, the colored particle and the low-density particle forming a composite with the resin particle through Coulomb force; a water-based ink composition containing the composite colored particles dispersed in a water-based medium; and a writing instrument loaded with the water-based ink composition.

7. 发明公开

EP4101656A1 MARKING PEN 审中-实审转让
公开(公告)号：EP4101656A1
公开(公告)日：2022-12-14
申请号：EP21751384.5
申请日：2021-01-14
申请人： Mitsubishi Pencil Company, Limited
发明人： KOBAYASHI, Yusuke , NAKAJIMA, Toru , HIRAYAMA, Akiko , TAKADA, Koji
IPC分类号： B43K8/02 , B43K8/24 , B43K24/08
摘要： A marking pen, comprising: a shaft cylinder; a porous pen core accommodated in the shaft cylinder, and configured to project from, and retract into, an opening part provided at a tip end of the shaft cylinder; an inner cotton accommodated in the shaft cylinder, and filled with an aqueous ink composition to be fed to the pen core, the aqueous ink composition including a water soluble organic solvent in an amount of from 20 mass% to 60 mass%; and a delivery mechanism configured to cause a tip end of the pen core to project from, and retract into, the opening part.

8. 发明公开

EP3971250A1 WATER-BASED BALLPOINT PEN 审中-实审转让
公开(公告)号：EP3971250A1
公开(公告)日：2022-03-23
申请号：EP20806072.3
申请日：2020-03-11
申请人： Mitsubishi Pencil Company, Limited
发明人： OGURA, Kousuke , HOMMA, Yuichiro
IPC分类号： C09D11/18 , B43K1/08 , B43K7/02
摘要： A water-based ballpoint pen 10 contains an aqueous ink composition in which resin particles having an average particle diameter of at least 0.3 µm are blended. The water-based ballpoint pen 10 is provided with a ballpoint pen tip 20 including a writing ball 30. The writing ball 30 is formed from a mixture that includes a hard phase component comprising tungsten carbide, a binder phase component comprising cobalt and nickel, and chromium.

9. 发明授权

EP2789474B1 WRITING INSTRUMENT WITH ERASING MEMBER 有权
公开(公告)号：EP2789474B1
公开(公告)日：2020-09-30
申请号：EP12855350.0
申请日：2012-12-04
申请人： Mitsubishi Pencil Company, Limited
发明人： OHTSUKA, Hiroshi
IPC分类号： B43K29/02 , B43K23/08 , B43K7/00 , B43K7/02 , B43K23/02 , B43K23/12 , B43K25/02 , B43L19/00

10. 发明公开

EP3647379A1 WATER-BASED INK COMPOSITION FOR BALLPOINT PEN 有权转让
公开(公告)号：EP3647379A1
公开(公告)日：2020-05-06
申请号：EP18823041.1
申请日：2018-06-22
申请人： Mitsubishi Pencil Company, Limited
发明人： HIRAYAMA, Akiko , OGURA, Kousuke , MIYOSHI, Kana
IPC分类号： C09D11/18 , C08L29/10 , C08L35/06 , C08L35/08
摘要： To provide an aqueous ink composition for ballpoint pen having excellent ink discharge properties at the initial writing (initial touch) even after exposure of the pen tip for a long period of time. The aqueous ink composition for ballpoint pen contains at least 0.1 to 5% by mass of a graft compound of an allyl alcohol-maleic anhydride-styrene copolymer composed of: (a) a polyoxyalkylene alkyl ether unit represented by Formula (I), (b) a maleic anhydride unit, and (c) a styrene unit, the allyl alcohol-maleic anhydride-styrene copolymer having the composition ratio (a) : (b) : (c) of 25 to 75:25 to 75:0 to 50% by mol and having a mass average molecular weight from 1000 to 50000, and polyoxyalkylene monoalkyl alcohol; 5 to 40% by mass of resin particles; and water; wherein in Formula (I), R represents an alkyl group having 1 to 5 carbons, and m is a positive number of 5 to 50.

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