US3356440A - Marking implement - Google Patents

Marking implement Download PDF

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Publication number
US3356440A
US3356440A US458658A US45865865A US3356440A US 3356440 A US3356440 A US 3356440A US 458658 A US458658 A US 458658A US 45865865 A US45865865 A US 45865865A US 3356440 A US3356440 A US 3356440A
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US
United States
Prior art keywords
barrel
tip
reservoir
capillary
ink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US458658A
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English (en)
Inventor
Darst Robert John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WA Sheaffer Pen Co
Original Assignee
WA Sheaffer Pen Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WA Sheaffer Pen Co filed Critical WA Sheaffer Pen Co
Priority to US458658A priority Critical patent/US3356440A/en
Priority to BR173175/65A priority patent/BR6573175D0/pt
Priority to ES0318999A priority patent/ES318999A1/es
Priority to GB46797/65A priority patent/GB1073267A/en
Priority to BE671827D priority patent/BE671827A/xx
Priority to FR37844A priority patent/FR1453152A/fr
Priority to NL6516767A priority patent/NL6516767A/xx
Application granted granted Critical
Publication of US3356440A publication Critical patent/US3356440A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material

Definitions

  • the barrelportions are separated; thereby withdrawing the point from contact with the reservoir in the second barrel portion and exposing the point for writing.
  • the point Upon reassembly of the barrel portions, the point furnishes a capillary path through which fluid is transferred from the reservoir in the second barrel portion to the reservoir in the first barrel portion; thereby back-flushing the point while substantially equalizing the fluid in the reservoirs. Simultaneous with this transfer of fluid, air passing through an air passage extending between the barrel portions, is drawn from the first to the second reservoir.
  • This invention relates to an improved marking implement and more particularly to a marking pen having a tip which is maintained in a free flowing, fully moistened, ready-to-mark condition.
  • ink is carried to and distributed over a relatively large surface area of the tip by means of a multiplicity of relatively small capillary passages.
  • Evaporation-ofthe volatile constituents of the ink and drying out of thetip-is thus a major problem in a marking pen, particularly if the pen when not in use is left uncapped for a prolonged period of time.
  • the remaining non-volatile ink constituents tend to temporarily clog the small capillaries and prevent proper flow of ink through the tip from the reservoir at one end thereof to the marking surface at the other.
  • marking implementmas in writing implements in general, it is desirable to have as large a capacity ink reservoir as practical in order to avoid frequent replacement or refilling.
  • a large capacity ink reservoir is particularly important in an implement such as a marking pen which is adapted to scribe relatively broad lines requiring a heavy ink lay down.
  • the capacity of an ink reservoir is limited by practical considerations, not the least of which is that of controlling the flow of ink from the reservoir. Such control may be accomplished, for example, by means of a valve or by means of a capillary filler.
  • the capillary filler has been found to be the least expensive means of controlling the ink flow from the reservoir in a marking pen.
  • the dimensions of thecapillary spaces will vary widely,
  • an object of this invention to provide a marking implement having improved operating and marking characteristics.
  • a marking pen which includes a barrel having two separable sections. These sections being normally assembled in coaxial alignment when the pen is conditioned for storage and being separable to condition the implement for marking.
  • Each of the barrel sections has a capillary fluid reservoir adapted to hold a supply of ink.
  • a capillary marking tip extends between and is in fluid communication with the reservoir elements in the two barrel sections when the barrel sections are assembled to condition the pen for storage.
  • Means is provided for fixedly connecting the tip to one of the barrel sections, this means preferably consisting of an extension of the barrel section.
  • the rearward end of the one barrel section i.e. the end opposite the tip, is preferably so constructed that the other barrel section may be assembled thereon after it has been initially removed from the tip end to expose the tip and condition the pen for marking.
  • the rearward end of the one barrel section effectively seals the capillary fluid reservoir in the other barrel section from the atmosphere while the pen is in use.
  • FIGURE 1 is a longitudinal sectional view of a marking implement constructed in accordance with this invention.
  • FIG. 2 is an enlarged sectional view of the implement taken substantially along line 22 of FIG. 1;
  • FIG. 3 is an enlarged sectional view of the implement taken substantially along line 33 of FIG. 1;
  • FIG. 4 is an enlarged sectional view of the implement taken substantially along line 4-4 of FIG. 1;
  • FIG. 5 is a fragmentary sectional view showing the connection between the barrel sections of the implement when the implement is conditioned for marking.
  • This marking implement includes a barrel consisting of two hollow, elongated, substantially cylindrical barrel sections 12 and 14.
  • the barrel section 12 includes a substantially cylindrical body 15 having an internal bore 15a. Integral with the body of the barrel section 12 and extending forwardly therefrom is a tip holder 16 having a bore 16a extending therethrough (see FIG. 3) and the opposite (rearward) end of the body 15 is closed by means of an end cap 17.
  • the forward end portion 15b of the barrel section body has a reduced external diameter, and thus an annular forwardly facing shoulder 18 is defined on the exterior of the barrel section body immediately adjacent the forward end portion 15b.
  • the tip holder 16 is still further reduced in outside diameter, and it is preferably forwardly tapered from its junction with the forward end portion 15b of the body.
  • the end cap 17 preferably has the same basic reduced external diameter as the forward portion 15b of the body.
  • a plurality of minute formations such as' the small ridges 19 and grooves 20 (see FIG. 4) on the forward portion 15b of the barrel section body extend from adjacent the shoulder 18 to a point spaced from the tip holder 16, leaving a clear sealing surface 15b on this forward portion 15 immediately adjacent the tip holder.
  • Similar formations such as ridges 21 and grooves 22 on the end cap 17 extend from approximately the rearward end of the barrel section body 15 to a point spaced from the rearward end of the cap 17.
  • the rearward end of the cap is beveled to provide a sealing surface 23.
  • the purpose of the formations and sealing surfaces on the forward end portion 15b and on the end cap 17 will be hereinafter more fully explained.
  • capillary marking tip 24 which is preferably formed of porous plastic in accordance with the teaching of Casey, et al., United States patent application Serial Number 244,196 filed December 12, 1962. 1
  • One end 24a of the tip extends forwardly of the tip holder 16 and is pointed or otherwise suitably shaped for marking.
  • the opposite end 24b of the tip extends rearwardly into the bore 15a of the barrel section body portion for fluid communication with a supply of ink contained therein.
  • the diameter of the tip 24 is slightly smaller than the diameter of the bore 16a of the holder 16 in order to permit air to pass into the barrel section 12 along the sides of the tip thereby effectively venting the interior of the barrel section to the atmosphere.
  • the tip 24, however, is held firmly and centrally within the bore 16a of the holder 16 by means of a plurality of formations 25 which extend inwardly from the bore-defining walls of the holder into engagement with the tip.
  • These formations 25 are preferably in the form of longitudinally extending ribs, and there are preferably four such ribs angu- 4 larly spaced from one another, as is best illustrated in FIGURE 3.
  • a capillary reservoir element or filler 26 Disposed within and substantially filling the bore 15a of the barrel section body portion 15 between the tip holder 16 and the end cap 17 is a capillary reservoir element or filler 26.
  • the filler is in fluid conducting relationship with and preferably at least partly surrounds the inner end 24b of the tip 24.
  • the filler 26 is preferably formed of felted fibers, a large portion of which are oriented in the longitudinal direction. The fibers of the filler provide throughout the filler innumerable capillary spaces and passageways for holding a supply of ink.
  • a suitable filler may be made in accordance with the teaching of United States Patent No. 3,111,702.
  • the capillary filler 26 in the illustrated embodiment is substantially cylindrical in shape except for a channel 27 formed longitudinally in its surface. As will be hereinafter more fully explained, this channel permits rapid charging of the filler with ink and it also provides a passageway for air insuring the desired degree of venting of capillary spaces in the filler.
  • the barrel section 14 includes a substantially cylindrical body 28 having an internal main bore 29 and a pair of concentric counterbores 30 and 31.
  • the body 28 is open at one end 32, and it is closed at the opposite end by means of an end cap 33.
  • the first counterbore 30 extends inwardly from the open end 32 of the body to an annular shoulder 34.
  • the second counterbore 31 extends inwardly from the shoulder 34 to a second annular shoulder 35 delimiting one extremity of the main bore 29, and the main bore in turn extends from this second shoulder 35 rearwardly to the end cap 33.
  • a capillary reservoir element or filler 36 Disposed within and substantially filling the main bore 29 of the barrel section body 28 is a capillary reservoir element or filler 36 having a longitudinal channel 37 formed therein.
  • the filler 36 is preferably formed of felted fibers and identical in all respects to the filler 26 disposed within the barrel section '12, and like filler 26, the filler 36 is adapted to hold a supply of ink within the innumerable capillary spaces and passageways therewithin.
  • Within the main bore 29 of barrel section 14 adjacent the end cap 33 are several longitudinal projections 38 which wedgingly engage and hold the rearward end of the filler 36.
  • An annular washer 40 having a central aperture 40a is snugly and fixedly positioned within the counterbore 31 of the barrel section 14 in firm abutment with the annular shoulder 35. This washer serves to retain the capillary filler in place within the main bore 29 of the barrel section.
  • the washer 40 has a central aperture 40a just large enough to accommodate the forward end of the tip
  • a pocket clip 42 may be attached to the end cap 33 of barrel section 14.
  • the barrel sections 12 and 14 are adapted to be releasably assembled together in a first coaxial relation illustrated in FIGURE 1 to condition the implement for storage and in a second coaxial relation illustrated in FIGURE 5 to condition the implement for marking.
  • the forward end portion 15b and the tip holder 16 of the barrel section 12 extend into the open end 32 of the barrel section 14, and the open end of barrel section 14 abuts the shoulder on the exterior of the barrel section 12.
  • An important feature of this invention is the relationship between the various parts of the implement when the barrel sections are assembled for storage.
  • the forward marking end 24a of thecapillary tip 24 extends into engagement with and is preferably enveloped by the capillary filler element 36, the engagement being such as to insure maximum fluid conducting communication between the tip and filler element.
  • this engagement of the tip 24 and the filler 36 places the two filler elements 26 and 36 within the two barrel sections into fluid communication with one another through the capillary tip 24, resulting in a novel and highly advantageous fluid system for the marking implement.
  • ink will be automatically transferred through the tip 24 from the more saturated element 36 to the less saturated element 26.
  • the filler elements are preferably equal in size and therefore the system insures in effect that the amounts of ink in the elements are maintained substantially equal. Since in marking, ink flows forwardly through the tip 24 from the reservoir element 26, the system will serve primarily to replenish ink to the reservoir element 26 from element 36, with the ink flowing rearwardly through the tip. This rearward flow of ink to replenish the filler 26 results in a reverse flushing of the tip 24 and effectively reconditions and cleans the tip.
  • the tip holder 16 is preferably disposed within the'aperture 40a of the washer 40.
  • the tip 24 and the reservoir fillers 26 and 36 should be substantially sealed from the atmosphere so that evaporation loss of the volatile constituents of the ink contained therein may be minimized.
  • the diameter of the first counterbore 30 of barrel section 14 is so dimen sioned that it will closely circumscribe and tightlyand frictionally engage the ribs 19 on the forward end portion 15b of the body of barrel section 12. It will be noted that this frictional connection does not produce a seal because air is free to bypass the forward end-portion on either side of the ribs 19 and through the grooves 20.
  • the inside diameter of the second counterbore 31 in the barrel section 14 is made approximately the same as the outside diameter of the forward end portion 15b of the body of the barrel section 12. It will be noted, however, that the second counterbore 31 is recessed from the open end of barrel section 14 by the length of the first counterbore 30, which is slightly shorter than the forward end portion 15b of the barrel section 12. Thus when the end 32 of barrel section 14 abuts the shoulder 18, only a very short length of the forward end portion surface 15b will sealingly engage the wall of the counterbore 3 1.
  • the end cap 17 of the barrel section 12 will be received within the open end 32 of the barrel section 14, and the end 32 will abut the rearward end of the barrel section body 15 as shown in FIGURE 5.
  • the beveled sealing surface 23 on the end cap 17 will sealingly engage the annular shoulder 34 at the end of the first counterbore 30 within barrel section 14, and the reservoir element 36 will be sealed from the atmosphere.
  • the ridges 21 and 6 grooves 22 on the end cap 17 serve the same purpose as the ridges 1? and grooves 20 on the forward end portion of the barrel section 12, namely to provide a tight frictional fit of the end cap within the first counterbore 30 of the barrel section 14, without themselves effecting a seal to alter the pressure within the barrel section 14.
  • the implement 10 may be assembled by the manufacturer as follows: The tip 24 is inserted within the bore 16 of the holder to the position illustrated in FIG. 1. The fillers 26 and 36 are then inserted into the barrel sections 12 and 14 respectively. Ink is then charged into the barrel sections preferably in an amount to completely saturate the fillers 26 and 36 therein. The channels 27 and 37 in the fillers serve to permit the ink to flow readily down the length of the filler to facilitate the charging of ink. After this ink has been charged, the end cap 17 is then placed on the end of the barrel 12 and sealed in place, and the washer 40 is inserted into the open end of barrel section 14 and also fixed in place against the shoulder 35. The barrel sections 12 and 14 are then assembled as illustrated in FIGURE 1 to condition the pen for storage.
  • barrel section 12 is removed from barrel section 14 to expose the outer end 24a of the marking tip.
  • the barrel section 14 is then preferably positioned on the reverse end of barrel section 12 to prevent accidental loss of the barrel section 14 and also to seal the reservoir element in that section from the atmosphere to prevent drying out.
  • the amount of ink in the reservoir filler 26 will be reduced to a level below that of filler 36 in barrel section 14, and if the marker is inadvertently left uncapped with the tip exposed for a prolonged period, some dry ink residue may accumulate on the forward marking portion 24a of the tip.
  • the exposed portion 24a. of the tip is again placed in contact with the filler 36 within barrel section 14. Since the filler 36 will generally contain more ink than the filler 26 at the time of reassembly, some of the ink in filler 36 will pass by capillary action through the tip 24 from the filler 36 to the filler 26.
  • a marking implement constructed in accordance with this invention automatically keeps the tip in a fully moistened ready-to-mark condition.
  • the ink may be drawn from the capillary reservoir filler and transferred to the marking tip much more efliciently and each time the marker is conditioned for storage, the tip is flushed and the reservoir element is recharged.
  • a marking implement including an elongate substantially air-tight barrel, a capillary reservoir element in each end of said barrel, a capillary point extending from one of said reservoir elements into releasable contact with the other, said point providing a fluid path extending between and communicating with said reservoir elements to permit the transfer of fluid therebetween and means for transferring air between said reservoir elements, said barrel being separable substantially intermediate said reservoir elements to expose one end of said point for marking.
  • a marking implement including an elongate substantially air-tight barrel, a capillary reservoir element disposed in each end of said barrel, each of said reservoir elements defining a multiplicity of intercommunicating capillary spaces, a point extending from one of said reservoir elements into releasable contact with the other, said point defining throughout its length a multiplicity of interconnected capillary spaces communicating with and providing a fluid path between said reservoir elements and means defining an air passage communicating with the capillary spaces in each of said reservoir elements, said barrel being separable substantially intermediate said reservoir elements to expose one end of said point for marking.
  • a marking implement including an elongate substantially air-tight barrel, a first reservoir element disposed in one end of said barrel, a second reservoir element spaced from said first reservoir element in the other end of said barrel, said reservoir elements being substantially equal in size, each of said reservoir elements defining a multiplicity of intercommunicating capillary spaces, a point mounted within said barrel and provided with an inner end in continuous contact with said first reservoir element and an outer end in releasable contact with said second reservoir element, said point defining a multiplicity of capillary spaces communicating with one another and with said spaces in said reservoir elements, said point providing a fluid path for the transfer of fluid between said reservoir elements and means defining an air passage communicating with the capillary spaces in each of said reservoir elements, said ends of said barrel being separable substantially intermediate said reservoir elements to expose the outer end of said point for marking.
  • a marking implement including a substantially airtight barrel, a capillary reservoir element in each end of said barrel, a point communicating with and providing a fluid path between said reservoir elements, and means definingan air passage between said reservoir elements, said point and said air passage simultaneously permitting the movement of ink and air in opposite directions between said reservoir elements to maintain said elements at substantially equal ink-air percentage levels, said barrel being separable substantially intermediate said reservoir elements to expose said point for writing.
  • a marking implement including a substantially airtight barrel, a reservoir element disposed in each end of said barrel and provided with a multiplicity of intercommunicating capillary spaces, each of said reservoir elements defining a non-capillary air vent extending substantially its entire.
  • a marking implement including a first barrel portion having an apertured end, a capillary point extending through said apertured end, a second barrel portion having an open end sized to envelop said point and sealably engage said first barrel portion adjacent said apertured end to isolate said point and the interior of said barrel portions from the atmosphere, a capillary reservoir element disposed within said first barrel portion in continuous communication with said capillary point, and a capillary reservoir element disposed within said second barrel portion for releasable communication with said point when said barrel portions are sealably secured together and means for transferring air between said capillary reservoir elements.
  • a pocket type marking implement including a first barrel portion having a reduced point section defining an apertured end, a capillary point mounted within said point section and provided with an inner end projecting rearwardly into said first barrel portion and a tip extending forwardly through said apertured end, a second barrel portion having an open end sized to envelop said tip and telescopically and sealably engage said point section to isolate Said point and the interior of said barrel portions from the atmosphere, a first capillary reservoir element disposed within said first barrel portion in continuous feeding communication with said inner end of said point, a second capillary reservoir element disposed within said second barrel portion for releasable feeding communication with said tip whereby both said reservoir elements are in communication with said point when said barrel portions are sealably secured together and means defining an air passage communicating between said capillary reservoir elements independently of the atmosphere.
  • a marking implement including a first barrel portion closed at its rearward end and having a reduced point section defining an apertured forward end, a point mounted within said point section and provided with a multiplicity of interconnected capillary spaces, said point having an inner end extending into said first barrel portion and a Writing tip extending forwardly through said apertured end, a second barrel portion having an open end sized to envelop said tip and telescopically and sealably engage said reduced point section to isolate said point and the interior of said barrel portions from the atmosphere said apertured forward end providing an air passage between the interior of said barrel portions, a first reservoir element disposed within said first barrel portion and provided with a multiplicity of intercommunicating capillary spaces in continuous communication with said air passage and said inner end of said point, a second reservoir element disposed within said second barrel portion and provided with a multiplicity of interconnected capillary spaces in releasable communication with said tip, whereby both said reservoir elements are in communication with said point and with one another through said point and said air passage when said open end of said second
  • a marking implement including a first barrel port on having a reduced point section defining a point-receivmg bore and an air passage coextensive with said bore, a point ted Within said bore and provided with a multiplicity of interconnected capillary spaces, said point having an inner end extending within said first barrel portion and a writing tip extending forwardly through said bore beyond said reduced point section, a second barrel portion having an open end sized to envelop said tip and telescopically and sealably engage said reduced point secton to isolate said point and the interior of said barrel portions from the atmosphere, a first reservoir element disposed within said first barrel portion and provided with a multiplicity of intercommunicating capillary spaces, said first reservoir element surrounding and engaging the inner end of said point to provide continuous communication between the capillary spaces in said reservoir element and the capillary spaces in said point, a second reservoir element disposed within said second barrel portion and provided with a multiplicity of intercommunicating capillary spaces, said second reservoir element being spaced from said open end a distance substantially
  • each of said reservoir elements defining a non-capillary air vent extending substantially its entire length and communicating with said capillary spaces therein and with said air passage, said capillary spaces in said point and said non-capillary vents and air channel permitting the movement of ink and air therethrough in opposite directions between said reservoirs to fully charge said point and to return said reservoir elements to substantially equal air-ink percentage levels while said barrel portions are in said point covering relationship after use of the imple ment, and a closure mounted on and sealing the outer end of said first barrel portion, said closure having substantially the same diameter as said reduced point section and sealably engaging said open end of said second barrel portion to isolate said second reservoir element from the atmosphere when said marking implement is conditioned for use.

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  • Pens And Brushes (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
US458658A 1965-05-25 1965-05-25 Marking implement Expired - Lifetime US3356440A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US458658A US3356440A (en) 1965-05-25 1965-05-25 Marking implement
BR173175/65A BR6573175D0 (pt) 1965-05-25 1965-09-15 Um implemento mercador
ES0318999A ES318999A1 (es) 1965-05-25 1965-10-28 Un dispositivo para marcar con tinta.
GB46797/65A GB1073267A (en) 1965-05-25 1965-11-04 Marking implement
BE671827D BE671827A (da) 1965-05-25 1965-11-04
FR37844A FR1453152A (fr) 1965-05-25 1965-11-09 Instrument de marquage notamment style
NL6516767A NL6516767A (da) 1965-05-25 1965-12-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US458658A US3356440A (en) 1965-05-25 1965-05-25 Marking implement

Publications (1)

Publication Number Publication Date
US3356440A true US3356440A (en) 1967-12-05

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ID=23821609

Family Applications (1)

Application Number Title Priority Date Filing Date
US458658A Expired - Lifetime US3356440A (en) 1965-05-25 1965-05-25 Marking implement

Country Status (6)

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US (1) US3356440A (da)
BE (1) BE671827A (da)
BR (1) BR6573175D0 (da)
ES (1) ES318999A1 (da)
GB (1) GB1073267A (da)
NL (1) NL6516767A (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341481A (en) * 1980-09-22 1982-07-27 Sanford Research Company Writing instrument with barrel and ferrule assembly
US20090226240A1 (en) * 2006-05-12 2009-09-10 Societe Bic Writing implement having a capillary writing tip

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1633433A (en) * 1926-03-26 1927-06-21 Boyer Henry Fountain pen
US2547803A (en) * 1947-01-23 1951-04-03 Adams Philip Pen cap
US2620499A (en) * 1950-02-11 1952-12-09 Rollinson W Poucher Marking device
US3195169A (en) * 1963-11-06 1965-07-20 Chadboarn Charles Henry Marking implement and holder therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1633433A (en) * 1926-03-26 1927-06-21 Boyer Henry Fountain pen
US2547803A (en) * 1947-01-23 1951-04-03 Adams Philip Pen cap
US2620499A (en) * 1950-02-11 1952-12-09 Rollinson W Poucher Marking device
US3195169A (en) * 1963-11-06 1965-07-20 Chadboarn Charles Henry Marking implement and holder therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4341481A (en) * 1980-09-22 1982-07-27 Sanford Research Company Writing instrument with barrel and ferrule assembly
US4341482A (en) * 1980-09-22 1982-07-27 Sanford Research Company Housing assembly for fluid marking device
US20090226240A1 (en) * 2006-05-12 2009-09-10 Societe Bic Writing implement having a capillary writing tip
US8177448B2 (en) * 2006-05-12 2012-05-15 Societe Bic Writing implement having a capillary writing tip

Also Published As

Publication number Publication date
ES318999A1 (es) 1966-08-01
BE671827A (da) 1966-03-01
BR6573175D0 (pt) 1973-07-17
NL6516767A (da) 1966-11-28
GB1073267A (en) 1967-06-21

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