US3724961A - Writing device having a retractable writing element - Google Patents

Writing device having a retractable writing element Download PDF

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Publication number
US3724961A
US3724961A US00078867A US3724961DA US3724961A US 3724961 A US3724961 A US 3724961A US 00078867 A US00078867 A US 00078867A US 3724961D A US3724961D A US 3724961DA US 3724961 A US3724961 A US 3724961A
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US
United States
Prior art keywords
push rod
sheath
writing device
writing
stub
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
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US00078867A
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English (en)
Inventor
J Levoin
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.)
PLASTICA SUDAMERICANA
Original Assignee
PLASTICA SUDAMERICANA
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 PLASTICA SUDAMERICANA filed Critical PLASTICA SUDAMERICANA
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Publication of US3724961A publication Critical patent/US3724961A/en
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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
    • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons

Definitions

  • ABSTRACT A writing device comprising a retractable writing element equipped with a co-axial release spring and housed in asheath topped with a push rod adapted to act directly on the upper end of the writing element.
  • the sheath is formed by injection moldingvwith an upper ring provided with a click tongue, the sheath and tongue being joined by a single breakable sprue of material the point of injection.
  • the sheath is formed at its upper end with a cylindrical portion having a diameter smaller than that of the sheath but equal to the inner diameter of the ring.
  • the device is provided with a push rod formed integral with diametrically opposed locking members adapted to cooperate with other locking member, also diametrically opposed, which are provided on the inner face of the small diameter portion at the upper end of the sheath, the locking members on one of the elements having two diametrically opposed stubs, formed on elastic tongues, which can be recessed and the locking members on the other element comprising two shaped cuts adapted to receive said stubs.
  • Writing devices of this kind provided with a mechanism for locking the writing element either in extended operating position or in retracted storage posiaforesaid drawbacks and to provide a pen or pencil,
  • a writing device such as a ball-point pen or a propelling pencil, which includes a retractable writing element equipped with a-co-axial release spring and which is housed in a sheath topped with a tripping push rod which acts directly'on the upper part of the writing element.
  • the writing device has the following features: its plastic sheath is injectionmolded together with an upper ring equipped with a click and spring tongue retained only by an injection sprue which can be broken up upon removal from the mold; the upper part of the sheath is also cylindrical, but its diameter, smaller than the rest of the sheath, is equal to the inner diameter of the ring; the push rod is formed with diametrically opposed locking members which may cooperate with other diametrically opposed locking members provided on the inner face of the small diameter portion at the top of the sheath; these locking members may comprise, on one of the elements, two diametrically opposed recessing stubs which are held by elastic tongues, while on the other element, two shaped cuts are provided to receive these stubs.
  • the stubs are integral with the push rod and the cuts are formed on the inside of the sheath.
  • the sheath-ring assembly is made in one piece in an injection molding process, all that is necessary after removing same from the mold is to push the ring axially in order to break its connection with the sheath and to drive it in until the tongue engages the hole;
  • the pen can thus be assembled automatically by machine.
  • the shaped cuts have closed profiles the upper edges of which are described by the upper faces of the stubs which come to rest on them.
  • the shaped cuts have closed profiles the upper edges of which are described by the upper faces of the stubs which come to rest on them.
  • One of the shaped out cuts is made with a simple slanted and transversal bar, the top part of which defines the operating position of the writing element, whereas underneath this top part a notch is provided to facilitate the recessing of the corresponding stub when the rod is pushed in.
  • the other out has a C shape.
  • the upper part of the C shape retains the corresponding stub for the writing element to remain in the retracted storage position, whereas the lower part of the C shape receives the same stub when the push rod is in its lower most position, that is to say before letting this rod go back to the storage position.
  • a notch is provided underneath the upper end i of C shape.
  • FIG. 1 is a longitudinal section of a ball-point pen designed and assembled according to the invention with the writing element shown in the storage position.
  • FIG. 2 is a view similar to FIG. 1 but with the writing element shown in the operating position.
  • FIG. 3 is a longitudinal view showing the sheath of the pen as it appears immediately after the molding operation, integral with its ring.
  • FIG. 4 is a longitudinal view showing the sheath after breakage of the injection point K and with the ring driven into the sheath.
  • FIG. 5 is a longitudinal section view showing the writing element with its associated spring inserted in the body of pen.
  • FIG. 6 is a longitudinal view of the assembled pen, complete with push rod.
  • FIG. 7 is a view of the push rod.
  • FIG. 8 is a cross-section view taken along the line VIII-VIII in FIG. 7.
  • FIG. 9 to FIG. 17 are views showing various faces of the pen, on one side or the other, and illustrate successive phases in the operation of the pen.
  • FIG. 18 is a diagram showing how one of the shaped out cuts is described by its retractable stub.
  • FIG. 19 is a diagram similar to FIG. 18 showing the other shaped out out and its associated stub.
  • FIG. 1 shows the pen with cartridge 13 in the storage position, and illustrates the manner in which ring 2 seats in place on sheath 1.
  • Ring 2 is secured to sheath 1 by engagement of the stub 4 formed on the inner face of click tongue 3 with a recess formed in sheath 1.
  • a cartridge 13 with its release spring 14 is disposed in contact with the heel 9 of the push rod 5.
  • the flexible spindles 6 and 7 with their stubs 11 and 12 are secured to the push rod and the spindle 8 links heel 9 directly to the push rod 5.
  • Two diametrically opposed recesses, 10 and 15, are formed on the inner face of cylinder 17 which is integral with sheath 1 but which has a smaller external diameter. Shoulder 19 connects cylinder 17 and sheath 1 (see FIG. 3).
  • the stub 12 of spindle 7 is restrained against downward movement by the upper part of recess while the spindle 6 is pressed down towards the central axis because its stub 11 is pressed against the inner face of sheath 1.
  • FIG. 3 and 4 show how it is possible to fabricate as a single unit sheath 1 with recesses 15 and 10 along with ring 2 which has a tongue 3 and which is connected by a sprue of material at injection point K to sheath 1 or cylinder 17.
  • a pressure applied in the direction of arrow F serves to break the sprue at injection point K and cylinder 17 and enters the cavity 18 of ring 2.
  • the click tongue 3 allows the boss 20 of injection point K to enter the recess or hole 16 provided in sheath 1 and when the ring 2 comes into contact with shoulder 19 it functions in the manner of an extraction plate (FIG. 4).
  • FIG. 7 which is a view of the push rod 5 shows heel 9 with its flexible spindles 7 and 6 equipped with their stubs 11 and 12 and also shows rod or spindle 8 which links heel 9 to the push rod 5.
  • FIG. 8 which is a cross section of the push rod shows the location of the flexible spindles 6 and 7 formed at their outer ends with their respective stubs 1 1 and 12 as well as the rod 8 which links heel 9 to push rod 5.
  • Each stub has a transversal upper face 21 or 22 and a slanting lower face 23 or 24 which facilitates its recessing upon elastic bending of tongue 6 or 7 (FIGS. 1 and 2).
  • FIGS. 10 and 15 show recesses on the inner face of cylinder 17 which can be cut out throughout the thickness of this cylinder: in any case they are covered by ring 2 when this ring is in place after the sprue of material at injection point K has been broken off. (FIG. 4).
  • writing element 13 is inserted into the sheath 1 along with its spring 14 (FIG. 5).
  • the push rod 5 is then simply driven in in the direction of arrow 25 (FIG. 6).
  • Stubs l1 and 12 recess automatically due to their slanting lower faces 23 and 24 (FIG. 7) before elastically engaging into cuts 10 and 15.
  • Cut 10 wherein stub 11, for example, can move is formed of a simple slanting and straight ramp which comprises an upper edge 26 and a lower edge-27. In front of the highest point of the upper edge 26, the lower edge 27 is cut out along the notch 28 (FIG. 18).
  • Cut 15 (FIG. 19) has a C profile and is formed in front of its highest point 120, with a downwardly directed notch 29.
  • stub 12 occupies upper position 12a in cut 15.
  • the comer 22 of stub 12 rests on the upper edge of cut 15 (FIGS. 1 and 9).
  • Simultaneously stub 11 occupies its retracted position 11 a (FIGS. 1 and 18).
  • stub 11 moves to recessed position 11g which allows it to move up again without meeting cut 10.
  • Stub 12 then engages the upper edge of cut 15 (position 12h, FIG. 19) which it follows up to position 12a while causing push rod 5 to rotate in the opposite direction, stub 11 meanwhile returning to position 11a.
  • the writing element is then again in its retracted, storage position (FIGS. 1, 9 and 17).
  • pens made in accordance with this invention may be equipped with a clip 28 of a known type (FIG. 3) attached to or formed integrally with the ring 2.
  • a writing device comprising a retractable writing element equipped with a co-axial release spring and housed in a sheath topped with a push rod adapted to act directly on the upper end of the writing element, wherein said sheath is formed of injected plastic together with an upper ring provided with a click tongue, said sheath and said ring being joined by a single breakable sprue of material at the injection point; means defining a hole disposed in said sheath adapted to receive a portion of said click tongue to secure said upper ring to said sheath; said sheath formed at its upper end with a cylindrical portion having a diameter smaller than that of the sheath but equal to the inner diameter of said ring; a push rod formed integral with diametrically opposed locking members adapted to cooperate with other locking members, also diametrically opposed, which are provided on the inner face of the small diameter portion at the upper end of the sheath, the locking members on one of the elements having two diametrically opposed stubs formed on plastic tongues, which can
  • a writing device according to claims 1, wherein one of said shaped cuts is made with a single slanted transversal bar the upper end of which defines the operating position ofthe writing element, and below this end a notch is provided to facilitate recessing of the corresponding stub when the push rod is pressed before it moves into its recessed position.
  • a writing device according to claims 1 wherein said other cut is of C shape the upper part of which maintains the corresponding stub in the recessed position of the writing element, whereas its lower end received the same stub in the lowermost position of the push rod, prior to releasing the push rod for return to its recessed position.
  • a writing device wherein a notch is formed below the upper end of said C shaped cut.
  • a writing device wherein said ring is provided with a clip to enable the writing device to be secured in a pocket.
  • a writing device wherein one of said shaped cuts is made with a single slanted transversal bar the upper end of which defines the operating position of the writing element, and below this end a notch is provided to facilitate recessing of the corresponding stub when the push rod is pressed before it moves into this recessed position.
  • one of said shaped cuts is of C shape, the upper part of which maintains the corresponding stub in the recessed position of the writing element, whereas its lower end receives the same stub in the lowermost position of the push rod prior to releasing the push rod for return to its recessed position.
  • a writing device wherein the other of said shaped cuts is of C shape, the upper part of which maintains the corresponding stub in the recessed position of the writing element, whereas its lower end receives the same stub in the lowermost position of the push rod, prior to releasing the push rod for return to its recessed position.
  • a writing device wherein the other of said shaped cuts is of C shape, the upper part of which maintains the corresponding stub in the recessed position of the writing element, whereas its lower end receives the same stub in the lowermost position of the push rod, prior to releasing the push rod for return to its recessed position.
  • a writing device wherein a notch is formed below the upper end of said C shaped cut.
  • a writing device wherein said notch is formed below the upper end of said C shaped cut.
  • a writing device wherein said notch is formed below the upper end of said C shaped cut.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US00078867A 1969-10-08 1970-10-07 Writing device having a retractable writing element Expired - Lifetime US3724961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6934874A FR2064671A5 (enrdf_load_stackoverflow) 1969-10-08 1969-10-08

Publications (1)

Publication Number Publication Date
US3724961A true US3724961A (en) 1973-04-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00078867A Expired - Lifetime US3724961A (en) 1969-10-08 1970-10-07 Writing device having a retractable writing element

Country Status (4)

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US (1) US3724961A (enrdf_load_stackoverflow)
CA (1) CA922185A (enrdf_load_stackoverflow)
DE (1) DE2048771A1 (enrdf_load_stackoverflow)
FR (1) FR2064671A5 (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407002A1 (en) * 1989-07-07 1991-01-09 Kabushiki Kaisha Pilot Device for advancing and retracting writing element in writing instrument
USD395448S (en) 1996-12-13 1998-06-23 Societe Bic S.A. Writing instrument
USD395673S (en) 1997-07-22 1998-06-30 Reynolds Ball point pen
USD399874S (en) 1997-12-30 1998-10-20 Maria Boix Gacia Ballpoint pen
USD435592S (en) 1999-01-13 2000-12-26 Quadrinvest S.P.A. Writing instrument
USD496401S1 (en) 2004-01-30 2004-09-21 Anand International Slim click pen
WO2009059211A2 (en) 2007-10-31 2009-05-07 Thx Ltd. Earphone device
US20090120654A1 (en) * 2007-11-08 2009-05-14 Gauthier Noel L Disposable tubular fire extinguisher
USD626592S1 (en) * 2009-12-31 2010-11-02 Holland Usa, Inc. Push button for a writing instrument
US8905092B2 (en) 2012-04-16 2014-12-09 Jameg Sanders Gas pump key
US11951763B1 (en) * 2023-04-18 2024-04-09 Corbin Briggs Ballpoint dot pen tattoo cartridge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196839A (en) * 1962-06-07 1965-07-27 Real Patentauswertungs Anstalt Operating mechanism for ball point pens and the like which may be pressed in a single piece with the snap members
GB1099569A (en) * 1965-08-02 1968-01-17 Bross Helmut Writing instrument
US3552868A (en) * 1967-11-14 1971-01-05 Cado Ets Writing instrument,especially ball-point pen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196839A (en) * 1962-06-07 1965-07-27 Real Patentauswertungs Anstalt Operating mechanism for ball point pens and the like which may be pressed in a single piece with the snap members
GB1099569A (en) * 1965-08-02 1968-01-17 Bross Helmut Writing instrument
US3552868A (en) * 1967-11-14 1971-01-05 Cado Ets Writing instrument,especially ball-point pen

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407002A1 (en) * 1989-07-07 1991-01-09 Kabushiki Kaisha Pilot Device for advancing and retracting writing element in writing instrument
US5004364A (en) * 1989-07-07 1991-04-02 Kabushiki Kaisha Pilot Device for advancing and retracting writing element in writing instrument
USD395448S (en) 1996-12-13 1998-06-23 Societe Bic S.A. Writing instrument
USD395673S (en) 1997-07-22 1998-06-30 Reynolds Ball point pen
USD399874S (en) 1997-12-30 1998-10-20 Maria Boix Gacia Ballpoint pen
USD435592S (en) 1999-01-13 2000-12-26 Quadrinvest S.P.A. Writing instrument
USD496401S1 (en) 2004-01-30 2004-09-21 Anand International Slim click pen
WO2009059211A2 (en) 2007-10-31 2009-05-07 Thx Ltd. Earphone device
US8447059B2 (en) 2007-10-31 2013-05-21 Thx Ltd Earphone device
US8942405B2 (en) 2007-10-31 2015-01-27 Thx, Ltd Earphone device
US20090120654A1 (en) * 2007-11-08 2009-05-14 Gauthier Noel L Disposable tubular fire extinguisher
US7878259B2 (en) 2007-11-08 2011-02-01 Gauthier Noel L Disposable tubular fire extinguisher
USD626592S1 (en) * 2009-12-31 2010-11-02 Holland Usa, Inc. Push button for a writing instrument
US8905092B2 (en) 2012-04-16 2014-12-09 Jameg Sanders Gas pump key
US11951763B1 (en) * 2023-04-18 2024-04-09 Corbin Briggs Ballpoint dot pen tattoo cartridge

Also Published As

Publication number Publication date
FR2064671A5 (enrdf_load_stackoverflow) 1971-07-23
DE2048771A1 (de) 1971-04-15
CA922185A (en) 1973-03-06

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