WO1999022944A1 - Double seal system for pressurized writing device - Google Patents
Double seal system for pressurized writing device Download PDFInfo
- Publication number
- WO1999022944A1 WO1999022944A1 PCT/US1998/023393 US9823393W WO9922944A1 WO 1999022944 A1 WO1999022944 A1 WO 1999022944A1 US 9823393 W US9823393 W US 9823393W WO 9922944 A1 WO9922944 A1 WO 9922944A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- main body
- sealing member
- writing
- writing device
- ink
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/02—Ink reservoirs; Ink cartridges
- B43K7/08—Preventing leakage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/02—Ink reservoirs; Ink cartridges
- B43K7/03—Ink reservoirs; Ink cartridges pressurised, e.g. by gas
Definitions
- the present invention relates generally to pressurized writing devices and more specifically to gas pressurized writing devices.
- Pressurized writing instruments have been in use for many years. Pressurized devices were incorporated into writing instruments to improve and maintain continuous ink flow to the tips of the writing instruments during operation of the instruments for extended periods in horizontal and •upside down positions. Moreover, the use of pressurized devices in writing instruments has reduced the need to vigorously shake the instrument to initiate ink flow after mere storage of a partly empty pen or cartridge in an inverted position.
- Pressurized systems have been used to minimize solvent loss in writing instruments which employ highly volatile solvents and in applications which employ high viscosity inks wherein pressure is needed to force the flow of ink to the writing tip.
- Mechanical and chemical pressurizing devices are two types of pressurizing systems which have been employed in writing instruments.
- Mechanical pressurizing devices contain a mechanism such as a spring to maintain constant pressure on the writing medium as consumption of the writing medium proceeds.
- Gas pressurized systems produce a pressurized gas such as nitrogen through chemical reactions, fermentation and the like, to maintain pressure on the writing medium for continuous supply of the medium to the point or nib of the writing instrument.
- U.S. Patent No. 3,130,711 to Eckerle discloses a positive pressure ball point pen which employs a gas pressurized system to maintain pressure on the writing medium in the pen. Pressure is maintained as the result of an electrolytic action between dissimilar metals (metals having different positions in the electromotive series of metals) within the pen or cartridge.
- the container body or cartridge is formed of a metal such as brass and portions of the inner surface thereof are coated with a different metal such as zinc.
- the zinc layer is coated with an insulative protective layer which is insoluble in the writing medium (ink) but soluble in the hydrocarbon grease plug which acts as an ink follower.
- a body of fluid electrolyte is disposed behind the hydrocarbon grease plug and contacts the dissimilar electrode metals as the ink becomes depleted. A gas is produced as the metals come into contact with the electrolyte. Hence, the pressure is maintained as the ink is consumed.
- a rubber plug ' is inserted into the end of the container to seal the system from the outside atmosphere and
- plug members as described above are used in gas pressurized systems to maintain a seal on the writing instrument and prevent leakage of the gas from the system, poor seals often result from the inability to hermetically seal a plug within the writing instrument. This is difficult to do in gas pressurized systems which prevent the use of certain bonding techniques due to the potential interaction or exposure of the bonding material or solvent with the gas.
- liquid sealants have been used in conjunction with plug members to maintain the integrity of the gas seal. This combination often produces internal pressure variations which interfere with the uniform flow of the writing medium.
- a writing device generally including a uniformly cylindrical main body partially filled with a writing medium such as ink.
- a writing tip is inserted into a first end of the main body and a first sealing member is inserted into the second end thereof.
- the first sealing member is located in the main body near the second end.
- a pressurized gas such as nitrogen is disposed in the body between the ink and the first sealing member.
- a gas forming means may be located in the main body to continually produce a gas as the ink is depleted to maintain pressure therein.
- a second sealing member is located between the first sealing member 'and a second end of the main body.
- Fig. 1 is a cross-sectional view along the longitudinal axis of the writing device of the present invention.
- Fig. 2 is an enlarged view of the sealing members shown in Fig. 1.
- FIG. 1 an embodiment of a writing device 10 constructed in accordance with the present invention is shown with the understanding that those of ordinary skill in the art will recognize many modifications and substitutions which may be made to various elements.
- Writing device 10 generally includes a main body 12 partially filled with ink 14.
- Writing device 10 may be used independently as a writing instrument or may be inserted as a cartridge into a barrel or writing implement housing.
- Body 12 may primarily be formed of a rigid polymer or plastic material such as nylon, acrylonitrile, butadiene, styrene terpolymer, or the like.
- Main body 12 is substantially and uniformly cylindrical along the length of its interior wall 13 and tapers towards a first end 16.
- a point or nib 18 is formed on first end 16 through which an ink tip 19 is positioned.
- At a second end 20 opposite first end 16 is an opening 22 through which a first or primary sealing member 24 is inserted.
- Sealing member 24 is a solid tubular member having tapered ends 24' and 24'' and is disposed a short distance from end 20 of body 12. A fluid tight seal is created by an interference fit between sealing member 24 and main body 12. A pressurized medium such as nitrogen gas 26 is disposed in body 12 between ink 14 and sealing member 24. The gas is pressurized to maintain a constant and continuous pressure on ink 14 such that ink 14 continuously and evenly flows through writing tip 19. Alternatively, a gas forming means, such as that set forth in U.S. Patent No. 3,130,711 and incorporated by reference herein, may be located in the main body to continually produce a gas as the ink is depleted to maintain pressure therein. Sealing member 24 is typically fabricated of a polymeric material such as polyethylene.
- Sealing member 24 is inserted longitudinally under pressure within body 12 and is radially contiguous with interior wall 13.
- sealing member 24 alone, as in the prior art, it can be difficult to provide a hermetic seal between sealing member 24 and interior wall 13 due to the variations in the surfaces of member 24 and interior wall 13.
- the method of insertion of member 24 into body 12 against interior wall 13 is limited due to the presence of gas in body 12. Methods such as welding or solvent bonding are undesirable due to the potential of interaction or leakage of gas during the process. In particular, if welding was used to bond the primary seal within body 12, the gas present therein would puncture holes in the bond formed between the two surfaces.
- a second or secondary sealing member 28 is inserted into end 20 and bonded or welded thereto in a fluid tight manner proximate first sealing member 24. It is preferable that sealing member 28 not be in contact with sealing member 24 so that all of the welding or bonding energy is transferred to the seal between sealing member 28 and interior wall 13 of body 12, and not divided between the bond formed between sealing member 28 and interior wall 13 of body 12 and a bond formed between primary seal 24 and secondary seal 28.
- the clearance between sealing member 24 and sealing member 28 in an average writing instrument is at a distance of approximately 0.5 to 1.0 mm although this range is not a limitation on the distance therebetween which may vary depending on the size and shape of the device.
- Interior wall 13 at end 20 has a stepped section 21 whereby the diameter of interior wall 13 is larger at this point with respect to the remaining interior.
- Sealing member 28 is preferably shaped in the form of a plug or button having a stem 30 thereon such that a first end of member 28 defining stem 30 fits within body 12.
- Stem 30 is tapered at the end thereof and provided to direct and maintain member 28 in body 12 during the insertion process. As shown, stem 30 does not contact interior wall 13 although this is by no means a limitation thereto and contact with wall 13 may or may not exist.
- a second end 32 of member 28 defines a button portion having a first button section 32' which is radially contiguous with stepped section 21 of interior wall 13 of body 12.
- a second button section 32'' of slightly larger diameter than section 32' abuts second end 20 and is flush with the exterior surface 29 of body 12.
- Sealing member 28 may be welded or bonded to body 12. It is preferable that sealing member 28 be ultrasonically or kinetically welded to body 12 to provide a tight leak-proof seal.
- Sealing member 28 is typically fabricated of a rigid polymer or plastic material such as nylon, acrylonitrile, butadiene, styrene terpolymer, or the like although the shape and material of sealing member 24 is not limited to the specific shape and material mentioned. It is preferable that sealing member 28 be fabricated of the same material as body 12 such that the surfaces of body 12 and sealing member 28 meld into one component. The combination of sealing members 24 and 28 provides a double sealing system against the leakage of gas out of body 12.
- the writing device of the present invention may be constructed by providing main body 12 having first end 16, second end 20 and interior wall 13. Ink 14 and gas 26 are inserted into main body 12 under pressure. Primary sealing member 24 is inserted under pressure into main body 12 immediately thereafter. Secondary sealing member 28 is inserted into second end 20 of main body 12 and sealed to the interior surface of main body 12 by welding or bonding (such as by solvent bonding) .
- the present invention provides one with a novel pressurized writing device which maintains constant pressure within the main body thereof and results in a steady flow of the writing medium when the device is in contact with writing paper or like means.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000518846A JP2001521844A (en) | 1997-11-05 | 1998-11-02 | Double seal system for pressurized writing instruments |
CA002309108A CA2309108C (en) | 1997-11-05 | 1998-11-02 | Double seal system for pressurized writing device |
BR9813189-3A BR9813189A (en) | 1997-11-05 | 1998-11-02 | Device for writing and process of building the same |
DE69839018T DE69839018T2 (en) | 1997-11-05 | 1998-11-02 | DOUBLE SEAL FOR UNDER PRESSURE WRITING DEVICE |
EP98957543A EP1028854B1 (en) | 1997-11-05 | 1998-11-02 | Double seal system for pressurized writing device |
AU13777/99A AU736954B2 (en) | 1997-11-05 | 1998-11-02 | Double seal system for pressurized writing device |
HK01106567A HK1035884A1 (en) | 1997-11-05 | 2001-09-17 | Double seal system for pressurized writing device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/964,790 US5924810A (en) | 1997-11-05 | 1997-11-05 | Double seal system for pressurized writing device |
US08/964,790 | 1997-11-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999022944A1 true WO1999022944A1 (en) | 1999-05-14 |
Family
ID=25509004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/023393 WO1999022944A1 (en) | 1997-11-05 | 1998-11-02 | Double seal system for pressurized writing device |
Country Status (14)
Country | Link |
---|---|
US (1) | US5924810A (en) |
EP (1) | EP1028854B1 (en) |
JP (1) | JP2001521844A (en) |
CN (1) | CN1278872C (en) |
AR (1) | AR014014A1 (en) |
AU (1) | AU736954B2 (en) |
BR (1) | BR9813189A (en) |
CA (1) | CA2309108C (en) |
DE (1) | DE69839018T2 (en) |
ES (1) | ES2297899T3 (en) |
HK (1) | HK1035884A1 (en) |
MX (1) | MXPA20004333A (en) |
TW (1) | TW455550B (en) |
WO (1) | WO1999022944A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1473172A1 (en) * | 2002-01-30 | 2004-11-03 | Mitsubishi Pencil Kabushiki Kaisha | Gas pressurization type writing utensil and writing utensil refill |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6164855A (en) * | 1998-03-26 | 2000-12-26 | Bic Corporation | Writing instrument with finger gripping device |
US6926458B2 (en) * | 2001-01-10 | 2005-08-09 | Mitsubishi Pencil Kabushikikaisha | Ball-point pen refill |
WO2017184570A1 (en) | 2016-04-21 | 2017-10-26 | Milwaukee Electric Tool Corporation | Internal pressure regulating marker pen |
CN106240194A (en) * | 2016-08-17 | 2016-12-21 | 韶关盛怡文具有限公司 | Novel space pen core |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3130711A (en) | 1961-11-22 | 1964-04-28 | Samuel Sklar | Positive pressure ball pen feed |
US4587999A (en) * | 1979-12-21 | 1986-05-13 | Pelikan Ag | Process for the production of a ball point pen cartridge |
US5738459A (en) * | 1995-05-08 | 1998-04-14 | Eversharp Pen Company | "Pressurized refill with multiple seal valve core plug and a method for pressurizing a refill" |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE378349C (en) * | 1923-07-11 | Wilhelm Pretscher | Fountain pen | |
FR577460A (en) * | 1924-09-05 | |||
FR807679A (en) * | 1935-06-21 | 1937-01-19 | Improvement in feather-type pens | |
GB471612A (en) * | 1936-04-08 | 1937-09-08 | Thomas De La Rue & Company Ltd | Improvements in or relating to self-filling fountain pens |
US2519341A (en) * | 1947-02-17 | 1950-08-22 | Carl A Barstow | Fountain pen |
FR1004708A (en) * | 1949-12-27 | 1952-04-02 | Reservoir writing instrument | |
DE898867C (en) * | 1952-04-02 | 1953-12-03 | Joachim Traenkner | Ballpoint pen with exchangeable refill |
FR1304160A (en) * | 1961-08-10 | 1962-09-21 | Fagard A J & Cie | Improvements to the tips of ballpoint pens |
US3420610A (en) * | 1966-08-08 | 1969-01-07 | Paper Mate Mfg Co | Writing instruments and self-pressurizing assemblies therefor |
CH547713A (en) * | 1969-04-23 | 1974-04-11 | Ananda Anlageanst | METHOD OF MANUFACTURING A BALLPOINT REFILL. |
JPS50822Y1 (en) * | 1970-11-06 | 1975-01-10 | ||
FR2532628B1 (en) * | 1982-09-03 | 1986-01-03 | Metaux Precieux Cie | APPARATUS FOR MANUAL DISPENSING AND DOSING OF PASTE PRODUCTS |
DE4200964C1 (en) * | 1992-01-16 | 1993-08-12 | Hans-Joachim Dipl.-Phys. O-3700 Wernigerode De Ahrens | |
US5628576A (en) * | 1995-05-08 | 1997-05-13 | Eversharp Pen Company | Pressurized refill with double seal valve core plug and a method for pressurizing a refill |
-
1997
- 1997-11-05 US US08/964,790 patent/US5924810A/en not_active Expired - Lifetime
-
1998
- 1998-11-02 CN CNB988129205A patent/CN1278872C/en not_active Expired - Lifetime
- 1998-11-02 ES ES98957543T patent/ES2297899T3/en not_active Expired - Lifetime
- 1998-11-02 EP EP98957543A patent/EP1028854B1/en not_active Expired - Lifetime
- 1998-11-02 DE DE69839018T patent/DE69839018T2/en not_active Expired - Lifetime
- 1998-11-02 AU AU13777/99A patent/AU736954B2/en not_active Ceased
- 1998-11-02 CA CA002309108A patent/CA2309108C/en not_active Expired - Fee Related
- 1998-11-02 WO PCT/US1998/023393 patent/WO1999022944A1/en active IP Right Grant
- 1998-11-02 BR BR9813189-3A patent/BR9813189A/en not_active IP Right Cessation
- 1998-11-02 JP JP2000518846A patent/JP2001521844A/en active Pending
- 1998-11-05 TW TW087118418A patent/TW455550B/en not_active IP Right Cessation
- 1998-11-05 AR ARP980105585A patent/AR014014A1/en active IP Right Grant
-
2000
- 2000-05-04 MX MXPA20004333 patent/MXPA20004333A/en unknown
-
2001
- 2001-09-17 HK HK01106567A patent/HK1035884A1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3130711A (en) | 1961-11-22 | 1964-04-28 | Samuel Sklar | Positive pressure ball pen feed |
US4587999A (en) * | 1979-12-21 | 1986-05-13 | Pelikan Ag | Process for the production of a ball point pen cartridge |
US5738459A (en) * | 1995-05-08 | 1998-04-14 | Eversharp Pen Company | "Pressurized refill with multiple seal valve core plug and a method for pressurizing a refill" |
Non-Patent Citations (1)
Title |
---|
See also references of EP1028854A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1473172A1 (en) * | 2002-01-30 | 2004-11-03 | Mitsubishi Pencil Kabushiki Kaisha | Gas pressurization type writing utensil and writing utensil refill |
EP1473172A4 (en) * | 2002-01-30 | 2008-10-08 | Mitsubishi Pencil Co | Gas pressurization type writing utensil and writing utensil refill |
Also Published As
Publication number | Publication date |
---|---|
EP1028854A1 (en) | 2000-08-23 |
MXPA20004333A (en) | 2000-12-11 |
HK1035884A1 (en) | 2001-12-14 |
EP1028854B1 (en) | 2008-01-16 |
AR014014A1 (en) | 2001-01-31 |
JP2001521844A (en) | 2001-11-13 |
AU736954B2 (en) | 2001-08-09 |
CN1290214A (en) | 2001-04-04 |
AU1377799A (en) | 1999-05-24 |
TW455550B (en) | 2001-09-21 |
CA2309108C (en) | 2004-08-10 |
CA2309108A1 (en) | 1999-05-14 |
ES2297899T3 (en) | 2008-05-01 |
EP1028854A4 (en) | 2005-06-22 |
DE69839018T2 (en) | 2009-02-12 |
BR9813189A (en) | 2002-02-19 |
DE69839018D1 (en) | 2008-03-06 |
US5924810A (en) | 1999-07-20 |
CN1278872C (en) | 2006-10-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2091574A1 (en) | Correction fluid dispenser | |
CA2402333C (en) | Pressurized writing instrument employing a compressible piston member | |
US5924810A (en) | Double seal system for pressurized writing device | |
US5421664A (en) | Fluid applicator with fluid tank pressurization device | |
US3997273A (en) | Ballpoint pen cartridge | |
US6435751B1 (en) | Click type writing implement | |
US6109484A (en) | Dropping container | |
CA1151114A (en) | Pressurized cartridge for a writing instrument | |
JP2584540B2 (en) | Applicator | |
JPS6112122Y2 (en) | ||
JP3417046B2 (en) | Writing implement | |
KR950004014Y1 (en) | Preventing leakage | |
JPH08118874A (en) | Writing utensil | |
JP2005074973A (en) | Member joining structure in coating tool | |
JP2005131901A (en) | Ballpoint pen | |
KR200342413Y1 (en) | Tip for Writing Instrument | |
JPH11268468A (en) | Coating tool | |
KR20020069469A (en) | Refill ink tube for writing utensils | |
JP2006240219A (en) | Ball-point pen refill | |
JP2005074975A (en) | Applicator | |
GB2405615A (en) | Marking instrument with re-sealable diaphragm punctured by cannula | |
JP2000051773A (en) | Liquid agent applicator | |
JP2001260593A (en) | Applicator | |
JP2003039876A (en) | Applicator | |
JP2004025761A (en) | Refill for writing instrument |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 98812920.5 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
ENP | Entry into the national phase |
Ref document number: 2309108 Country of ref document: CA Ref document number: 2309108 Country of ref document: CA Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: PA/A/2000/004333 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13777/99 Country of ref document: AU |
|
ENP | Entry into the national phase |
Ref document number: 2000 518846 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1998957543 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1998957543 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWG | Wipo information: grant in national office |
Ref document number: 13777/99 Country of ref document: AU |
|
WWG | Wipo information: grant in national office |
Ref document number: 1998957543 Country of ref document: EP |