US3285228A - Anti-gravity pen - Google Patents

Anti-gravity pen Download PDF

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Publication number
US3285228A
US3285228A US456986A US45698665A US3285228A US 3285228 A US3285228 A US 3285228A US 456986 A US456986 A US 456986A US 45698665 A US45698665 A US 45698665A US 3285228 A US3285228 A US 3285228A
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United States
Prior art keywords
cartridge
barrel
ball
piston
sealing ring
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Expired - Lifetime
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US456986A
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English (en)
Inventor
Paul C Fisher
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Individual
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Individual
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Priority to US456986A priority Critical patent/US3285228A/en
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    • 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

Definitions

  • This invention relates generally to pressurized ball point pens; more particularly, the present invention relates to ball point pens which may be used with the ball point in an elevated position relative to the ink supply.
  • Ball point pens which have a pressurized feed are numerous. However, there is no commercially successful pressurized ball point pen on the market to date. The previous attempts to provide a pressurized ball point pen failed for a number of reasons and for the most part it was a combination of the elements of the pen construction which did not permit the successful operation of the pressurized ink supply over a substantial period of time.
  • Another object of the present invention is the provision for pressurizing the ink cartridge at the same time that the ball point is advanced into writing position.
  • the object of the present invention is the provision of a chamber having extensive volume to minimize any variation in pressure due to variation in the ink volume.
  • This invention also has for an object the provision of a ball point pen which is pressurized manually-when the ball point is advanced and which pressure is relea-sed upon retraction of the boil point.
  • Another particular object of the present invention is the provision of sealing means which achieves the pressurization without failure -or extrusion of tlie seal.
  • FIGURE 1 is a side elevational view partly cut away and partly in section showing the ball point in its advanced position and the ink supply pressurized.
  • FIGURE 2 is the side elevational view partly cut away and partly in section showing the ball point retracted and the ink supply at atmospheric pressure.
  • FIGURE 3 is a cross-sectional view partly broken away and taken along lines 3 3 of FIGURE 1.
  • FIGURE 4 is an exploded perspective View of the ball point pen according to the present invention.
  • FIGURE 5 is a side elevational view taken along lines 5-5 of FIGURE 4.
  • the ball point pen in accordance with the present invention is depicted generally by the numeral and is composed of a conventional two-part barrel housing 12 and 14 which are joined together as by screw threads 16 on respective force lit sleeves 1S and 20.
  • the barrel receives a conventionally shaped cartridge 22 which contains a suitable ink.
  • the viscosity of the ink should be sufficiently high and the clearance between the ball and the side walls of the socket suiciently tight to substantially eliminate the oozing of the ink from the tip when the ink is under the maximum pressure which exists when the ink chamber is full.
  • This new design of pressure pump can be used successfully with most of the ball point inks currently on the market.
  • the cartridge 22 has the conventional enlarged portion 24 upon which ice spring 26 acts upwardly as is well known in the art.
  • the cartridge at its lower end is provided with a passageway 28 that provides iluid communication between the main supply of ink in the cartridge and the ball 30.
  • the ball is seated preferably positioned in a hard surfaced metal socket S having a seat 31 and in contact with side wall 32.
  • a hard surfaced metal socket S having a seat 31 and in contact with side wall 32.
  • One of the unique aspects of the present invention is that it has been found to be importa-nt to the successful operation of the pen that the equatorial band around the ball formed by the side wall 32 of the ball sockets should have a minimum width E not less than 25% of the ball diameter.
  • the maximum clearance between the ball and the side wall must be somewhat less than .0003 inch.
  • the side walls of the sockets including the seat 3-1 are made from stainless steel such as #303 or #416. With a .0394 inch diameter ball, a clearance of .00015 inch may be used.
  • the exterior 34 yofthe passageway 28 is slidingly lreceived within the necked down portion 36 of the barrel to provide support for the cartridge at'the lower end.
  • the ink cartridge at the upper end is received within a sealing ring housing 38 formed by an annular collar 40 having top lip 41.
  • the collar is fitted tightly against ring shaped boss 42 positioned on the upper end of the sleeve 18. It can be seen from FIGURES 1 and 2 that the collar 40, lip 41, and the boss 42 form a stationary enclosure or an-nular groove 44 which receives conventional sealing ring 46.
  • the type of sealing ring that is found particularly useful is the quad ring. However, the O-ring may also be utilized. As shown, the sealing ring 46 bears tightly around the outside diameter of the cartridge 22 and thus forms an airtight lit preventing air from bypassing the seal. ⁇ l
  • the upper end of the cartridge is n contact with piston 48 which on its underside is provided with an abutting means 50 best shown in FIGURE 3.
  • the abutting means on the piston is formed with a recess 52 that loosely surrounds the upper portion of the ink cartridge.
  • the abutting means 50 within the recess 52 is provided with at least one groove 54 or as shown a plurality of intersecting grooves which form an air passage means in conjunction with Athe spacing between the upper end of the cartridge and the side walls of the lrecess 52. This air passage means permits gaseous communication withthe interior of the cartridge 22 through its open top 56.
  • the piston 48 is provided with an annular groove S8 which is closed on top, bottom and the side facing the ink cartridge but is open on the side facing the wall of the upper barrel 12 and accordingly provides an airtight sealing iit with the barrel when sealing means is positioned within the annular groove S8.
  • the sealing means 60 is essentially the same as sealing means 46 except for the difference in diameter.
  • the piston is operable by a conventional plunger 62 which is maintained in retracted or advanced position by conventional catches not shown.
  • the barrel is provided with an air vent 64 having a bevelled or rounded inner edge 65 which performs a unique function in the ball point pen according to present seal 60.
  • the rounded edge of the vent prevents damage to the sliding sealing member.
  • the position of the air vent and its size readily determines the pressure created within the chamber 66 formed between the sealing means and the inside of the barrel.
  • the piston moves downwardly increased pressure occurring between the sealing means forces air out through the vent 64 until such time as the sealing means 60 contacts and closes vent 64.
  • Further downward movement of the piston 48 increases the pressure within chamber 66 and with no means of relieving such pressure, the chamber 66 remains pressurized, the pressure being transmitted up through recess 52 through air passage means 54 and through opening 56 into the cartridge 22 to force the ink supply to the ball. Du-ring retraction -of the point, pressure is relieved when the piston moves above the Vent. t
  • the size of the air vent By varying the size of the air vent, the amount of air that is permitted to escape during depression of the piston is controlled and also by raising the air vent toward the top of the pen, greater pressure can be built up within chamber 66 since the piston is in its compression stroke for a longer period without venting.
  • the size of the air vent in accordance with the present invention should be between .005 to .050 inch, preferably the opening should be approximately .013 inch.
  • the pressure within the chamber 66 during writing should be .1 p.s.i. and 2. p.s.i. for currently conventional ball pen inks.
  • the sealing rings should be lubricated.
  • lubricants found the those formed from silicones such as produced by Dow Corning under the number 111. While this and other lubricants may be used, they all should have a viscosity of greater than 50,000 cpc. in order to prevent the seepage of air around the sealing rings. The air vent must be sufficiently large so that it will not be clogged by the high viscosity lubricant.
  • a ball pointed pen comprising:
  • an ink cartridge containing an ink supply said cartridge being slidably positioned within said barrel, and having an open end
  • a piston operable by said plunger for sliding movement within said barrel
  • said piston having an annular groove open in cross section on the side facing the barrel and substantially closed on the other sides,
  • said piston 4 having abutting means for contacting the upper end of said cartridge for effecting downward movement of said cartridge and said ball point into writing position
  • sealing rings are lubricated with a lubricant with a viscosity in excess of 50,000 centipoise.
  • a ball pointed pen comprising:
  • an ink cartridge containing an ink supply said cartridge being slidably positioned within said barrel, and having an open end
  • said piston having an annular groove open in cross sec-tion on the side facing the barrel and substantially closed on the other sides,
  • said piston having abutting means for contacting the upper end of said cartridge for effecting downward movement of said cartridge and said ball point into writing position
  • a ball pointed pen comprising:
  • an ink cartridge containing Ian ink supply said cartridge being slidably positioned within said barrel, and having an open end
  • said piston having .an annular ⁇ groove 'open in cross section on the side facing the barrel and substantially closed on the other sides, v v
  • said piston having abutting means for contactingthe upper end of the said cartridge for eifecting downward movement of said cartridge and said yball point into writing position, said abutting means being provided with a recess to receive the upper end of said cartridge, said recess being constructed with grooves ⁇ forming in part said air passage means,
  • air passage means positioned between said piston and said cartridge for cond-ucting air into and out of said cartridge
  • a ball pointed pen comprising;
  • an ink cartridge containing an ink supply said cartridge being -slidably positioned within said lbarrel, and having an open end
  • said piston having an ⁇ annular ygroove open in cross section on the side facing the barrel and substantially closed on the other sides,
  • a first lannular' sealing ring positioned within said groove, being in sliding contact with said barrel, said piston having abutting ⁇ means for contacting the upper end of said car-tridge for effecting downward movement of said cartridge and said ball point into writing position, and abutting means being provided with a recess to receive the upper end of said cartridge, including said recess 'being constructed with grooves forming in part said air passage means,
  • air passage means positioned between said piston and said cartridge for conducting air linto and Iout of said cartridge
  • a ball pointed pen comprising:
  • said Isocket having side walls and a seat formed by a hard surfaced material, said side wall contacting said ball point along an equitorial band having a width not less than 25 of the ball point diameter, the clearance between said side wall and said ball point being not greater than .0003 inch.
  • said piston having an annular groove open in cross section on the side facing the barrel and substantially closed on the other sides,
  • air passage means positioned between said piston and piston and said cartridge for conducting air into and out of said cartridge
  • a ball pointed pen comprising:
  • an ink cartridge containing an ink supply said cartridge being slidably positioned within said barrel, and having an open end
  • a rotating ball and a socket retaining said ball point being positioned at the other end of said cartridge, said socket having side walls and a seat formed of a hard surfaced material, said side wall contacting said ball point along an equitorial band having a width not less than 25% of the ball point diameter, the clearance between said side wall and said b-all point being not greater than .0003 inch.
  • said piston having an annular groove open in cross section on the side facing the barrel and substantially closed on the other sides,
  • a ball pointed pen comprising:
  • an ink cartridge containing an -ink supply said cartridge being slidably positioned within said barrel, and having an open end
  • a rotating ball and a socket -retaining said ball point being positioned at the other end of said cartridge, said socket having side walls and a seat formed of a hard surfaced material, said side wall contacting said ball point along an equatorial band having a switch width not less than 25% -of the ball point said piston having abutting means for .contacting the upper end of said cartridge for effecting downward movement of said cartridge and said ball point into writing position,
  • said air vent having an interior rounded edge in sliding vcontact with the iirst sealing ring
  • said air vent providing communication between the atmosphere and said chamber when said piston is positioned above said air vent

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US456986A 1965-05-19 1965-05-19 Anti-gravity pen Expired - Lifetime US3285228A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113274A1 (fr) * 1982-12-30 1984-07-11 S.T. DUPONT Société anonyme dite: Perfectionnements aux stylographes à cartouches-recharges
US4475834A (en) * 1982-04-02 1984-10-09 Bean Donald F Writing instrument projectable by fluid pressure
US20090060625A1 (en) * 2007-08-29 2009-03-05 Tombow Pencil Co. Ltd. Pressurized pen
US20120086664A1 (en) * 2009-06-29 2012-04-12 Gerald Leto Multifunctional writing apparatus with capacitive touch screen stylus
US20140064820A1 (en) * 2012-08-24 2014-03-06 James John Mach Assisted opening compact novelty utensil
US9176028B2 (en) 2012-10-04 2015-11-03 Ut-Battelle, Llc Ball assisted device for analytical surface sampling
US10849418B2 (en) 2018-03-01 2020-12-01 Bruce John Taylor Paint pen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT157758B (de) * 1938-01-24 1940-01-25 Friedrich Seefranz Vorrichtung zum Abstützen der Skie beim Tragen.
US2432061A (en) * 1946-08-23 1947-12-02 Eagle Pencil Co Writing instrument
FR995271A (fr) * 1949-09-14 1951-11-29 Instrument à écrire, tel que stylographe ou porte-plume à réservoir
DE926054C (de) * 1950-07-13 1955-04-04 Ehrenreich Haeuselmann Fuellschreibgeraet mit in der Spitzenbohrung des Halters des Geraetes axial verschiebbar gelagertem Schreibroehrchen und gesteuertem Schreibgutfluss
US2787249A (en) * 1954-09-28 1957-04-02 Sidney D Barlow Pressurizing means for ink devices
US2870742A (en) * 1956-10-19 1959-01-27 Technical Res Inc Pressure feed for cartridge type writing instrument
US3133526A (en) * 1960-12-19 1964-05-19 Hartley Pen Co Writing instrument with largecapacity cartridge

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT157758B (de) * 1938-01-24 1940-01-25 Friedrich Seefranz Vorrichtung zum Abstützen der Skie beim Tragen.
US2432061A (en) * 1946-08-23 1947-12-02 Eagle Pencil Co Writing instrument
FR995271A (fr) * 1949-09-14 1951-11-29 Instrument à écrire, tel que stylographe ou porte-plume à réservoir
DE926054C (de) * 1950-07-13 1955-04-04 Ehrenreich Haeuselmann Fuellschreibgeraet mit in der Spitzenbohrung des Halters des Geraetes axial verschiebbar gelagertem Schreibroehrchen und gesteuertem Schreibgutfluss
US2787249A (en) * 1954-09-28 1957-04-02 Sidney D Barlow Pressurizing means for ink devices
US2870742A (en) * 1956-10-19 1959-01-27 Technical Res Inc Pressure feed for cartridge type writing instrument
US3133526A (en) * 1960-12-19 1964-05-19 Hartley Pen Co Writing instrument with largecapacity cartridge

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475834A (en) * 1982-04-02 1984-10-09 Bean Donald F Writing instrument projectable by fluid pressure
EP0113274A1 (fr) * 1982-12-30 1984-07-11 S.T. DUPONT Société anonyme dite: Perfectionnements aux stylographes à cartouches-recharges
US4544297A (en) * 1982-12-30 1985-10-01 S. T. Dupont Ball point pen venting
US20090060625A1 (en) * 2007-08-29 2009-03-05 Tombow Pencil Co. Ltd. Pressurized pen
US7819601B2 (en) * 2007-08-29 2010-10-26 Tombow Pencil Co., Ltd. Pressurized pen
US20120086664A1 (en) * 2009-06-29 2012-04-12 Gerald Leto Multifunctional writing apparatus with capacitive touch screen stylus
US20140064820A1 (en) * 2012-08-24 2014-03-06 James John Mach Assisted opening compact novelty utensil
US9370961B2 (en) * 2012-08-24 2016-06-21 James John Mach Assisted opening compact novelty utensil
US9176028B2 (en) 2012-10-04 2015-11-03 Ut-Battelle, Llc Ball assisted device for analytical surface sampling
US10849418B2 (en) 2018-03-01 2020-12-01 Bruce John Taylor Paint pen

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