Source: http://www.google.com/patents/US7374356?ie=ISO-8859-1&dq=7069184
Timestamp: 2015-05-23 13:49:11
Document Index: 718428101

Matched Legal Cases: ['art 52', 'art 52', 'art 52', 'art 52', 'art 52', 'art 52', 'arts 511', 'arts 512', 'art 51', 'art 51', 'art 92', 'art 512', 'art 512', 'art 92', 'art 512', 'art 512', 'art 92', 'art 92', 'art 512', 'art 512', 'art 52', 'art 52']

Patent US7374356 - Double-head writing instrument - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA double-head writing instrument has a barrel having a partition formed inside thereof, first and second ink-tanks provided inside the barrel so as not to communicate each other, first and second ink-retaining members connected with first and second nibs provided on an opening of the first and second...http://www.google.com/patents/US7374356?utm_source=gb-gplus-sharePatent US7374356 - Double-head writing instrumentAdvanced Patent SearchPublication numberUS7374356 B2Publication typeGrantApplication numberUS 11/012,069Publication dateMay 20, 2008Filing dateDec 15, 2004Priority dateDec 16, 2003Fee statusPaidAlso published asCN1628994A, CN100497002C, CN100589992C, CN101254723A, CN101254723B, CN101254724A, CN101254725A, CN101254725B, CN101301833A, CN101301833B, EP1543991A2, EP1543991A3, EP1543991B1, US7575385, US7611300, US20050186013, US20080145134, US20080175647Publication number012069, 11012069, US 7374356 B2, US 7374356B2, US-B2-7374356, US7374356 B2, US7374356B2InventorsShigeru OikeOriginal AssigneeThe Pilot Ink Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (14), Non-Patent Citations (1), Referenced by (2), Classifications (14), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetDouble-head writing instrument
US 7374356 B2Abstract
thickness C of the partition and thickness D of a side wall of the barrel connected with the partition satisfy a relation of 0.2≦C/D≦2.5,
wherein inclined surfaces slanting relative to the axial direction are provided on an inner surface of the partition on the first ink-reservoir side and second ink-reservoir sides, respectively.
2. The double-head writing instrument as set forth in claim 1, wherein one end of the partition is connected with the side wall of the barrel in a vicinity of the first ink-retaining member and
3. The double-head writing instrument as set forth in claim 1, wherein the partition comprises:
bottom walls connected with both ends of the central wall and also with the side wall of the barrel, the bottom walls slanting relative to the axial direction.
4. The double-head writing instrument as set forth in claim 1, wherein the inclined surfaces are visually confirmed almost over entire partitions, when the partition is viewed from the opening of the first ink-tank and also when viewed from the opening of the second ink-tank.
5. A double-head writing instrument, comprising:
6. The double-head writing instrument as set forth in claim 5, wherein one end of the partition is connected with a side wall of the barrel in a vicinity of the first ink-retaining member, and
7. The double-head writing instrument as set forth in claim 5, wherein the partition comprises:
8. The double-head writing instrument as set forth in claim 5, wherein the inclined surfaces are visually confirmed almost over entire partitions, when the partition is viewed from the opening of the first ink-tank and also when viewed from the opening of the second ink-tank.
Where the double-head writing instrument of the JP-A-2002-36786 with a small quantity of ink remaining in the ink reservoir is used for writing in a horizontal state or in a state where the nib is pointed diagonally upward, it may result in an insufficient contact between the guiding core and the ink inside the ink reservoir, there by causing an ink flow failure such as an inability to write or blurred writing.
The double-head writing instrument 1 according to the third aspect of the present invention is constructed so as to allow the first ink reservoir 7A and the second ink reservoir 7B to overlap each other in a radial direction through the partition 3 and also reserve different color inks in the first ink reservoir 7A and the second ink reservoir 7B, thereby the inks of two different colors in the ink reservoirs can be visually closely confirmed and aesthetic appeal is also increased. Further, when the double-head writing instrument 1 according to the third aspect of the present invention is contained or displayed in a pen stand and the like, the first ink reservoir 7A exposed above the pen stand and the second ink reservoir 7B also can be easily confirmed at the same time and the combination of two colors (namely, combination of colors consisting of the two different colors) can be easily confirmed. Further, the combination of different colors includes colored inks different in color and inks of a colored ink and a colorless ink (colorless liquid).
the other end of the partition is connected with the sidewall of the barrel in a vicinity of the second ink-retaining member. In the above writing instrument, the axial length of the first ink tank 5A and that of the second ink tank 5B can be set relatively longer, thereby preventing the ink from being splattered during filling.
a first large-diameter part opened forward; and a first small-diameter part which is constituted in small by the partition and continuously formed at rear of the first large-diameter part, wherein the second ink-tank comprises:
a second large-diameter part opened forward; and a second small-diameter part which is constituted in small by the partition and continuously formed at rear of the second large-diameter part, wherein the first ink-retaining member is provided inside the first large-diameter part, the second ink-retaining member is provided inside the second large-diameter part, the first and second ink-reservoirs directly reserve the first and second ink, the first and second inks are visually confirmed, a first engagement portion of the barrel which engages with the first cap is provided anterior to the first small-diameter part, and a second engagement portion of the barrel which engages with the second cap is provided anterior to the second small-diameter part. In the double-head writing instrument 1 according to the eleventh aspect of the present invention, the first ink 7A in the first small-diameter part 52A and the second ink 7B in the second small-diameter part 52B can be visually closely confirmed from the outside, thereby increasing aesthetic appeal. In addition, in the double-head writing instrument 10 according to the eleventh aspect of the present invention, when contained or displayed in a pen stand and the like, the first small-diameter part 52A exposed above the pen stand and the like and the second small-diameter part 52B can be visually confirmed at the same time, and the color of the first ink 7A and that of the second ink 7B can also be easily confirmed.
Further, in the double-head writing instrument 1 according to the eleventh aspect of the present invention, a sink may easily occur on the outer surface of the barrel 2 having therein the partition 3 extended in a longitudinal axis. Therefore, where a joint part with the cap is provided on the outer surface of the barrel 2 having the partition 3, the part may not be properly formed due to a sink, of ten resulting in a joint failure of the cap. However, in the double-head writing instrument 1 of the eleventh aspect of the present invention, the joint part with the cap is provided on the barrel 2 anterior to the first small-diameter part 52A and the barrel 2 anterior to the second small-diameter part 52B, the proper joint with a cap can be obtained even when a sink occurs on the outer surface of the barrel 2 having therein the partition 3.
wherein the overridden engagement part is provided on the outer surface of the first and second large-diameter part, respectively, and the air-tight sealed part is provided on a front end of the first and second large-diameter part, respectively. The double-head writing instrument 1 according to the thirteenth aspect of the present invention is constructed, in combination with the composition described in the eleventh aspect of the present invention, wherein a sink occurrence on the overridden engagement parts 511A and 511B or air-tight sealed parts 512A and 512B can be prevented, thereby providing a more appropriate joint structure with the cap. Further, the air-tight sealed parts, 512A and 512B, are provided on the front end of the first large-diameter part 51A and the front end of the second large-diameter part 51B, thereby reducing least possible degree air compressed inside the cap when attaching the cap.
In the double-head writing instrument 1 according to the fifteenth aspect of the present invention, when the first nib 4A is used, with the nib kept horizontally, under the condition where the first ink 8A in the first ink reservoir 7A remains in a smaller quantity, one end of the partition 3 and a part connected with the side wall of the barrel 2 in the vicinity of the first ink-retaining member 6A are pointed downward, the first ink remaining in a small quantity in the first ink reservoir 7A is moved to the rear end of the first ink-retaining member 6A, and a condition where the rear end of the first guiding core 61A is in contact with the first ink 8A can be maintained, thereby preventing an ink flow failure from occurring (refer to FIG. 20). Similarly, in the double-head writing instrument 1 according to the fifteenth aspect of the present invention, when the second nib 4B is used, with the nib kept horizontal, under the condition where the second ink 8B in the second ink reservoir 7B remains in a smaller quantity, one end of the partition 3 and apart connected with the side wall of the barrel 2 in the vicinity of the second ink-retaining member 6B are pointed downward, allowing the second ink remaining in a small quantity in the second ink reservoir 7B to move to the rear end of the second ink-retaining member 6B, thereby maintaining a condition where the rear end of the second guiding core 61B is in contact with the second ink 8B and preventing an ink flow failure occurrence.
According to a twenty-fifth aspect of the present invention asset for thin the twenty-fourth aspect of the present invention, it is preferable that the first and second caps are detachably attached to the barrel on first and second nib sides,
the first and second caps are made of transparent or translucent material,
the other end of the partition is connected with the sidewall of the barrel in a vicinity of the second ink-retaining member.
the second ink-tank includes a second large-diameter part opened forward and a second small-diameter part which is constituted in small by the partition and continuously formed rear of the second large-diameter part,
a second ink-retaining member is provided inside the second large-diameter part,
Effects of the Invention The double-head writing instrument according to the first aspect of the present invention is provided with an increased aesthetic appeal. Also, the double-head writing instrument is visually easily recognized for the ink color of the first ink reservoir and that of the second ink reservoir when contained or displayed in a pen stand and the like. Further, it is possible to become lower in the number of parts to thereby reduce the production cost. Furthermore, it is not occurred that any holes formed on the partition or sink formed on the outer surface of the side wall of the barrel which connected with the partition.
The barrel 2 is a cylindrical body with both ends opened and prepared by injection molding of transparent or translucent synthetic resin (namely, synthetic resins of colorless transparent or non-colored transparent synthetic resins). The partition 3 is formed inside the barrel 2. The first ink tank 5A opened at one end of the barrel 2 and the second ink tank 5B opened at the other end of the barrel 2 are formed inside the barrel 2. The first ink tank 5A and the second ink tank 5B are not communicatively connected through and are blocked so that the ink does not flow in or out of each other through the partition 3. The transparent or translucent synthetic resin may include, for example, polypropylene.
The outer surface of the side wall of the barrel 2 connected with the partition 3 is provided with the printed layer 21 indicating lettering, patterns, bar codes and others. The printed layer 21 maybe obtained, for example, by screen printing, pad printing, offset printing or transferring printing. The outer surface of the side wall of the barrel 2 connected with the partition 3 can be provided with the appropriate printed layer 21 free from any printing failure since sink occurrence is prevented during molding. The printed layer 21 is formed so that the first ink tank 5A in an overlapped state, which corresponds the first ink reservoir 7A, and the second ink tank 5B, which corresponds the second ink reservoir 7B, can be visually recognized from the outside. In the present embodiment, the printed layer 21 is formed partially on the outer surface of the side wall of the barrel 2 connected with the partition 3. Particularly, in the present invention, the outer surface of the side wall of the barrel 2 connected with the partition 3 is almost free from sink. Thus, there will be no possibility of printing failure, even if the printed layer 21 is formed on the outer surface of the side wall of the barrel 2 having the joint part with the partition 3, which may often develop sink marks.
The first ink-retaining member 6A is a member that temporarily retains the ink spilled depending on an increase in pressure within the first ink reservoir 7A, and an injection molding of synthetic resins (for example, ABS resin) with a plurality of circular comb teeth in the present embodiment. The first nib 4A is provided at the front end of the first ink-retaining member 6A. An axial center aperture is provided through the axial center of the first ink-retaining member 6A, and the ink guiding core 61A is attached into the axial center aperture. The front end of the ink guiding core 61A is connected with the first nib 4A, and the rear end of the ink guiding core 61A is connected with the first ink reservoir 7A. The ink guiding core 61A may include a fiber modification, a porous body or an extrusion molding of synthetic resin having an axial capillary channel in the longitudinal axis, and a resinated fiber product (for example, resinated product of polyester fiber) is used in the present embodiment.
In addition to the above, the first nib 4A and the second nib 4B may include the following examples such as a combination of two fiber modifications different in configuration, that of two ball-point pen tips, that of two brush tips, that of two porous body tips, that of two metal fountain-pen type nibs provided with a slit at the tip, that of two pen tips made of extrusion moldings of plastic resin (plastic pen tip), that of a fiber modification with a porous body tip, that of a fiber modification with a plastic pen tip, that of a fiber modification with a brush tip, that of a fiber modification with a fountain-pen nib, that of a fiber modification with a ball-point tip, that of a porous body tip with a plastic pen tip, that of a porous body tip with a brush tip, that of a porous body tip with a fountain-pen nib, that of a porous body tip with a ball point tip, that of a plastic pen tip with a brush tip, that of a plastic pen tip with a fountain pen nib, that of a plastic pen tip with a ball point tip, that of a brush tip with a fountain pen nib, that of a brush tip with a ball point tip and that of a fountain pen nib with a ball point tip. It is preferable that the outer surface of the ball point tip is colored in the same color with the ink in the first ink reservoir 7A and the second ink reservoir 7B. Further, the nib of the present invention includes a nib holder interposed between the nib and the barrel 2.
The first cap 9A is a bottomed cylindrical body with one end closed and the other end opened and made by injection molding of transparent or translucent synthetic resin that is, colorless transparent or non-colored transparent synthetic resins. The outward projection 511A of the first ink tank 5A, the outward projection 511B of the second ink tank 5B, the inward projection 91A that can override and engage, and the annular seal part 92A sealable with the annular air-tight part 512A of the first ink tank 5A and the annular air-tight part 512B of the second ink tank 5B are formed integrally on the inner surface of the first cap 9A. The transparent or translucent synthetic resin include polypropylene.
Similarly, the second cap 9B is a bottomed cylindrical body with one end closed and the other end opened, and made by injection molding of transparent or translucent synthetic resin that is, colorless transparent or non-colored transparent synthetic resins. The outward projection 511A of the first ink tank 5A, the outward projection 511B of the second ink tank 5B, the inward projection 91B that can override and engage, and the annular seal part 92B sealable with the annular air-tight part 512A of the first ink tank 5A and the annular air-tight part 512B of the second ink tank 5B are formed integrally on the inner surface of the second cap 9B. The transparent or translucent synthetic resin include polypropylene.
More particularly, the joint part of the first cap 9A, which corresponds an inward projection 91A and an annular seal part 92A, is identical in configuration with the joint part of the second cap 9B, which corresponds an inward projection 91B and an annular seal part 92B. Also, the joint part of the first ink tank 5A, which corresponds an outward projection 511A and an annular air-tight part 512A, is identical in configuration with the joint part of the second ink tank 5B, which corresponds outward projection 511B and annular air-tight sealed part 512B. Therefore, the first cap 9A can be attached on the first ink tank 5A having the first nib 4A or on the second ink tank 5B having the second nib 4B, where as the second cap 9B can be attached either on the ink tank 5A having the first nib 4A or on the second ink tank 5B having the second nib 4B. Namely, the first cap 9A can be attached on the barrel 2 either on the first nib 4A side or on the second nib 4B, whereas the second cap 9B can be attached on the barrel 2 either on the first nib 4A side or on the second nib 4B.
The third embodiment is illustrated in FIG. 11 and FIG. 12. The present embodiment is different in position of the partition 3 from the first embodiment, as explained in the second embodiment. More particularly, in the first embodiment, the central wall 31 is positioned at the axial center of the barrel 2, whereas in the present embodiment, the central wall 31 is deviated from the axial center in the radial direction, and the second bottom wall 33 constituting the bottom wall of the first ink reservoir 7A is set to be larger in area than the first bottom wall 32 constituting the bottom wall of the second ink reservoir 7B. Therefore, the volume of the first ink reservoir 7A (namely, volume of the small-diameter part 52A) is set to be larger than the volume of the second ink reservoir 7B (volume of the small-diameter part 52B).
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4902151 *Jul 29, 1988Feb 20, 1990Pentel Kabushiki KaishaWriting instrument with plural elementsUS5338123 *Sep 13, 1993Aug 16, 1994Pelikan GmbhDouble-ended penUS6340260 *Sep 29, 2000Jan 22, 2002Kevin P. DaoMarker assembly having hinged capUS20010012468Feb 8, 2001Aug 9, 2001Mitsubishi Pencil Kabushiki KaishaDouble ended direct-feed type writing implementBE381267A Title not availableCN1270894AMar 24, 2000Oct 25, 2000三菱铅笔株式会社Liquid spreaderCN2666681YNov 25, 2003Dec 29, 2004李源Filling feeding ink double-colour penDE2857370A1Nov 25, 1978Jun 12, 1980Annette HagemannBall point and felt tipped pen - uses ink for felt tip to cover guide marks made by ball pointDE29809659U1May 30, 1998Oct 8, 1998Limbeck AchimKugelschreiber mit Werbeaufdruck f�r Linksh�nderEP1151873A1Nov 19, 1999Nov 7, 2001Mitsubishi Pencil Kabushiki KaishaCollector for writing instrumentsJP1095259S Title not availableJP2001334794A Title not availableJP2002036786A Title not availableJPH05212997A Title not available* Cited by examinerNon-Patent CitationsReference1European Search Report for EP 04 02 9696 dated Jul. 3, 2007.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8496392 *Sep 24, 2008Jul 30, 20133M Innovative Properties CompanyWriting instrument with sheet dispenserUS20130067672 *Sep 17, 2012Mar 21, 2013Joanna Paulina KozlowskiIn shower make-up remover* Cited by examinerClassifications U.S. Classification401/23, 401/34, 401/17International ClassificationA47L1/08, B43K5/02, B05C1/00, B43K27/08Cooperative ClassificationB43K8/003, B43K7/005, B43K5/025, B43K5/005, B43K27/08European ClassificationB43K27/08, B43K5/02MLegal EventsDateCodeEventDescriptionOct 19, 2011FPAYFee paymentYear of fee payment: 4May 4, 2005ASAssignmentOwner name: PILOT INK CO., LTD., THE, JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OIKE, SHIGERU;REEL/FRAME:016525/0818Effective date: 20050303RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services