EP0530227B1 - Drehbleistift - Google Patents

Drehbleistift Download PDF

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Publication number
EP0530227B1
EP0530227B1 EP91909010A EP91909010A EP0530227B1 EP 0530227 B1 EP0530227 B1 EP 0530227B1 EP 91909010 A EP91909010 A EP 91909010A EP 91909010 A EP91909010 A EP 91909010A EP 0530227 B1 EP0530227 B1 EP 0530227B1
Authority
EP
European Patent Office
Prior art keywords
lead
collet
barrel
pencil
clamping means
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
EP91909010A
Other languages
English (en)
French (fr)
Other versions
EP0530227A1 (de
EP0530227A4 (en
Inventor
William Earle Tucker
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.)
Gillette Co LLC
Original Assignee
Gillette Co LLC
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 Gillette Co LLC filed Critical Gillette Co LLC
Publication of EP0530227A1 publication Critical patent/EP0530227A1/de
Publication of EP0530227A4 publication Critical patent/EP0530227A4/en
Application granted granted Critical
Publication of EP0530227B1 publication Critical patent/EP0530227B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/22—Writing-cores gripping means, e.g. chucks

Definitions

  • the present invention relates to continuous feed pencil mechanisms, and more particularly to a continuous feed pencil mechanism which is capable of employing leads of more than one diameter size.
  • a recent development in the mechanical lead pencil market has been the introduction of a continuous feed pencil which is adapted to take a cartridge containing a plurality of leads, or wherein a number of leads are introduced into the pencil mechanism to be fed singly through the feed mechanism.
  • the mechanical lead pencils in the marketplace are generally restricted to a single lead diameter due to the construction of the feed mechanism. While there are two common lead diameters, .5 millimeters and .7 millimeters employed for use in a pencil of this type, the .7 millimeter lead generally may not be fed through the front opening in the smaller diameter pencil barrel due to the limited size of the opening to support the .5 millimeter lead for which the pencil is constructed. In like manner, the .5 millimeter lead, when fed through the front opening in the barrel of a pencil constructed to employ the .7 millimeter lead, will break due to the enlarged opening providing inadequate support for the lead protruding from the opening of the pencil.
  • U.S. Patent 2203160 is concerned with a manually activated feed of pencil leads in which two resilient rods extend transversely to the length of lead and are operable to arrest the lead as it advances to a retaining chuck.
  • a mechanical lead pencil for accommodating replaceable leads each of substantially uniform diameter from a choice of more than one diameter size, said pencil including an elongated cylindrical barrel (12, 14) through which a lead (20) may pass from a rear end to a leading end, first clamping means (21) within said barrel at a location spaced rearwardly from said leading end and second clamping means (25) located proximate said leading end, said first clamping means being operable releasably to engage said lead (20) and to move said lead toward said leading end and said second clamping means being operable releasably to engage the lead (20) at the leading end of the barrel, characterized in that a resilient disc (35) having a central aperture (38) is positioned between said first and second clamping means within the barrel (12, 14) coaxially with said barrel and with said lead (20), and in that said disc (35) is of elastomeric material and has a plurality of slits (39) extending through said disc in a direction radially outwardly from
  • a mechanical lead pencil of the fed through type employing a replaceable lead which comprising a cylindrical elongated barrel having an opening formed at the front end thereof through which the lead is directed.
  • a first means for releasably engaging the lead and moving the lead toward the barrel front end is located at a point spaced from the barrel front end and a second means for releasably engaging the lead is disposed at the opening at the front end of the barrel.
  • Means for frictionally engaging the lead is disposed between the first and second lead engaging means to maintain the lead positioned in the barrel when the lead is released by the first and second lead engaging means.
  • the means for frictionally engaging the lead comprises a disc of elastomeric material having a circular opening formed in the center thereof for receiving the lead in frictional engagement and further comprises a plurality of slits formed therein disposed radially outwardly from the circular opening, extending through the thickness of the disc to allow greater flexibility of the circular opening formed in the center of the disc.
  • the first means for releasably engaging the lead is preferably a collet having a plurality of collet member biased outwardly from the lead retained in the pencil barrel and a collet collar for retaining the collet members in engagement with the lead when the collet is in a rearward location in the barrel.
  • the second means for releasably engaging the lead may also comprise a collet having a plurality of collet fingers, the collet fingers extending partially beyond the barrel front end and biased outwardly from the axis of the barrel.
  • the barrel front end opening or tip may comprise an inner wall tapered forwardly outwardly at an acute angle with the axis of the barrel and the collet fingers which are disposed at the barrel opening comprise an outer surface engaged with the tapered wall whereby during forward and rearward movement the collet is retained in sliding engagement with the inner tapered wall by the outward bias of the collet fingers.
  • a mechanical lead pencil 10 of the feed through type comprising a barrel 12, the barrel 12 including a barrel tip 14, having external threads 16 disposed on the external surface at the rear thereof.
  • the barrel 12 further has a bushing 17 fixed to the inner surface thereof, and a stationary sleeve 18 which may be press fit into the bushing 17 such that the bushing 17 and sleeve 18 remain fixed from rotation or movement in the axial direction, within the barrel 12.
  • the bushing 17 is provided with threads on the inner forward surface thereof for mating with the threads 16 on the barrel tip 14 such that the barrel tip 14 may be removed in assembling the various components located at the forward end of the barrel 12.
  • Means for releasably engaging a lead 20 is provided in the form of a three piece collet 21 comprising collet members 22, only two of which are depicted in Figures 1 and 2 for descriptive purposes.
  • Collet 21 is biased rearwardly in the barrel 12 by a spring (not shown) or other means with a force sufficient to retract the collet members 22 into a cylindrical collet collar 24 which is movable within the barrel tip 14.
  • the angular outer surfaces of the collet members 22 provide a wedging action between the collet collar 24 and the lead 20 which causes the combination of the collet collar and collet members 22 to provide a substantial gripping force onto the lead 20.
  • a second collet 25 is disposed at the front end of the barrel tip 14, partially extending beyond a front opening 26 through which the lead 20 extends for writing purposes.
  • the collet 25 comprises three collet fingers 28 (only two of which are shown) which are biased outwardly by the spring action of the fingers.
  • the opening 26 of the barrel tip 14 is provided with a forwardly outwardly canted surface 27, and the collet fingers 28 each have an outwardly facing surface 29 which is angled rearwardly inwardly to correspond to the surface 27 and mate therewith when the collet 25 is in its rearward most position, as shown in Figure 1.
  • a toroidaly shaped retainer ring 30 which may be of plastics; metal or other substantially rigid material is disposed within the barrel tip 14 with the rearward extensions of the spring collet fingers 28 retained therein.
  • the retainer ring 30 is affixed to the ends of the collet fingers 28 and a spring 32 is disposed between the retainer ring 30 and the surface 33 of the barrel tip 14 and is effective to bias the collet 25 rearwardly into the position shown in Figure 1.
  • a circular disc 35 of elastomeric material is provided between the bearing surfaces 36 and the rear surface of the retainer ring 30.
  • the disc 35 has a circular opening 38 formed therein and a plurality of slits 39 directed radially outwardly from the opening 38, and extending through the thickness of the disc.
  • the material of the disc may be rubber or other elastomeric material and the thickness is such that the segments of the disc between the slits 39 are capable of flexing to accommodate a plurality of various diameter objects within the opening 38.
  • the means for frictionally engaging the lead is herein shown as the disc 35, it should be understood that the structure adjacent the circular opening 38 could comprise integrally molded fingers or other means providing sufficient flexure to accommodate leads of more than one diameter.
  • the mechanical pencil is employed for writing purposes with the lead 20 disposed within the barrel 12 as shown in Figure 1 while an adequate amount of lead extends beyond the tip of the collet 25 which forms the forward most portion of the pencil 10.
  • the lead 20 is gripped firmly by the collet members 22, is frictionally retained in the disc 35 and is gripped by the collet fingers 28 which serve to stabilize the lead against the radial movement during the writing process.
  • the collets 21 and 25 are capable of opening to accept a plurality of diameter leads while still maintaining their function of gripping the lead and supporting it during the writing process.
  • the disc 35 being formed of an elastomeric material, and being provided with the slits 39, is capable of accepting a plurality of diameter leads and providing a frictional gripping force on the lead when received in the opening 38.
  • the lead 20 may be a single lead which is fed into the pencil or may be one of a number of leads contained in a dispensing cartridge, as is well known in the art.
  • the collet 21 when it is desired to move the lead 20 forward through the barrel 12, the collet 21 is moved forwardly towards the opening 26 in the barrel tip 14. Movement of the collet 21 in the forward direction may be accomplished in any manner well known in the mechanical pencil art, for example by applying manual pressure to the rear of the pencil, or, in the event that an eraser is provided on the rear end of the pencil, at said eraser, to force the collet forwardly into the barrel against the aforementioned spring bias in the rearward direction. As described above, the collet members 22 and the collet collar 24 are locked about the perimeter of the lead 20 resulting in the lead 20, collet members 22 and the collet collar 24 being moved forwardly in the barrel 12 by movement of the collet 21 in the forward direction.
  • a rearwardly facing stop surface 40 extends radially inwardly in the opening of the barrel 12 and upon contacting the stop surface, the collet collar 24 ceases its movement and the further movement of the collet members 22 cause them to be released from the collet collar 24 and to spring to the open position, releasing the lead 20, as shown in Figure 2.
  • the collet 21, the disc 35 and the collet 25 each serve distinct and separate functions in operation of the mechanical pencil 10.
  • the collet 21 is effective to grip the lead 20 and move it forwardly to extend the lead beyond the opening 26 of the barrel tip 14 while the collet 25 serves to grip the lead 20 and rigidly support the lead adjacent its free end during the writing operation.
  • the disc 35 is effective to retain the lead 20 within the barrel at the point of operation wherein the lead is released by both the collet 21 and collet 25.
  • each of the elements, the collet 21, the collet 25 and the disc 35 are capable of performing the particular function set forth when a plurality of lead diameters are employed in the pencil.
  • the pencil 10 provides a versatile writing instrument in that the user is not restricted to either the .5 millimeter or the .7 millimeter leads, as is the case with prior art writing instruments.

Claims (5)

  1. Füllbleistift zur Aufnahme auswechselbarer Bleiminen, die jeweils einen einheitlichen Durchmesser einer Auswahl von mehr als einer Durchmessergröße aufweisen, wobei der genannte Bleistift folgendes umfaßt: eine langgestreckte, zylindrische Trommel (12, 14), durch die eine Bleimine (20) von einem hinteren Ende zu einem vorderen Ende geführt werden kann; eine erste Klemmeinrichtung (21), die sich in der genannten Trommel an einer Position befindet, die hinter dem genannten vorderen Ende beabstandet ist; und eine zweite Klemmeinrichtung (25), die sich in der Nähe des vorderen Endes befindet, wobei die erste Klemmeinrichtung so funktionsfähig ist, daß sie ausrückbar mit der genannten Bleimine (20) eingreift, und daß sie die Bleimine in Richtung des vorderen Endes transportieren kann, und wobei die zweite Klemmeinrichtung so funktionsfähig ist, daß sie an dem vorderen Ende der Trommel ausrückbar mit der Bleimine (20) eingreift, dadurch gekennzeichnet, daß eine elastische Scheibe (35) mit einer zentralen Öffnung (38) zwischen der ersten und zweiten Klemmeinrichtung in der Trommel (12, 14) positioniert ist, und zwar koaxial zu der genannten Trommel und zu der genannten Bleimine (20), und daß die genannte Scheibe (35) aus einem elastomeren Werkstoff besteht und eine Mehrzahl von Schlitzen (39) aufweist, die sich durch die Scheibe erstrecken, und zwar in eine von der zentralen Öffnung (38) radial auswärts verlaufende Richtung, teilweise in Richtung der Scheibenperipherie, wobei die Scheibe so funktionsfähig ist, daß sie mit der sich durch die genannte zentrale Öffnung (38) erstreckenden Bleimine (20) eingreift und die Bleimine hält, wenn die genannte erste und die genannte zweite Klemmeinrichtung gelöst werden.
  2. Füllbleistift nach Anspruch 1, dadurch gekennzeichnet, daß es sich bei der genannten ersten Klemmeinrichtung zum Eingriff mit der Bleimine um eine Zwinge (21) mit einer Mehrzahl von Klemmelementen (22) handelt, die von der Achse der Trommel (12) nach außen vorgespannt sind, und mit einem Zwingenkragen (24), der dazu dient, die genannten Klemmelemente im Eingriff mit einer Bleimine (20) zu halten, wenn sich die genannte Zwinge (21) an einer hinteren Position in der Trommel (12) befindet.
  3. Füllbleistift nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß es sich bei der genannten zweiten Klemmeinrichtung zum ausrückbaren Eingriff mit der Bleimine um eine Zwinge (25) mit einer Mehrzahl von Klemmfingern (28) handelt, wobei sich die genannten Klemmfinger (28) teilweise über das vordere Ende der Trommel hinaus erstrecken und von der Achse der Trommel auswärts vorgespannt sind.
  4. Füllbleistift nach Anspruch 3, dadurch gekennzeichnet, daß sich in der Trommel (12, 14) eine Feder (32) befindet, die dazu dient, die zweite Zwinge (25) in der Trommel nach hinten zu drücken.
  5. Füllbleistift nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Öffnung (26) des vorderen Endes der Trommel eine Innenwand (27) aufweist, die in einem spitzen Winkel zu der Achse der Trommel (12, 14) nach vorne und nach außen eine Konizität aufweist, und daß die genannten Klemmfinger (28) eine Außenoberfläche (29) aufweisen, die mit der konischen Wand (27) eingreift, wobei die genannte Zwinge (25) bei einer Vorwärts- bzw. Rückwärtsbewegung der Zwinge durch die Vorspannung der Klemmfinger (28) nach außen in gleitendem Eingriff mit der konischen Innenwand (27) gehalten wird.
EP91909010A 1990-05-22 1991-02-06 Drehbleistift Expired - Lifetime EP0530227B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US52710390A 1990-05-22 1990-05-22
US527103 1990-05-22
PCT/US1991/000818 WO1991017694A1 (en) 1990-05-22 1991-02-06 Mechanical pencil

Publications (3)

Publication Number Publication Date
EP0530227A1 EP0530227A1 (de) 1993-03-10
EP0530227A4 EP0530227A4 (en) 1993-10-13
EP0530227B1 true EP0530227B1 (de) 1996-05-01

Family

ID=24100106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91909010A Expired - Lifetime EP0530227B1 (de) 1990-05-22 1991-02-06 Drehbleistift

Country Status (7)

Country Link
EP (1) EP0530227B1 (de)
JP (1) JP3187418B2 (de)
AT (1) ATE137447T1 (de)
CA (1) CA2079478A1 (de)
DE (1) DE69119225T2 (de)
ES (1) ES2086540T3 (de)
WO (1) WO1991017694A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9406837D0 (en) * 1994-04-07 1994-06-01 Parker Pen Bv Propelling pencil mechanism
JPH08207489A (ja) * 1994-12-07 1996-08-13 Kotobuki:Kk ダブルチャック式シャープペンシル
DE102011104385A1 (de) * 2011-06-16 2012-12-20 Volkswagen Ag Haltevorrichtung und Verfahren zum lösbaren Befestigen eines Bolzens
KR101501831B1 (ko) * 2013-06-28 2015-03-12 문지연 회전출납식 분필 홀더

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028855A (en) * 1934-09-12 1936-01-28 Winter Arthur Mechanical pencil
US2078433A (en) * 1935-12-18 1937-04-27 Winter Arthur Lead feeding pencil
US2203160A (en) * 1937-12-20 1940-06-04 Pelikan Werke Wagner Guenther Magazine pencil of the type comprising a lead-conveying tube
US2484640A (en) * 1946-02-23 1949-10-11 Parker Pen Co Mechanical pencil
US2700959A (en) * 1951-08-20 1955-02-01 Rodi & Wienerberger Ag Mechanical pencil
FR2196253B3 (de) * 1972-08-16 1976-07-30 Faber Castell A W

Also Published As

Publication number Publication date
EP0530227A1 (de) 1993-03-10
JPH05507038A (ja) 1993-10-14
CA2079478A1 (en) 1991-11-23
DE69119225D1 (de) 1996-06-05
ATE137447T1 (de) 1996-05-15
JP3187418B2 (ja) 2001-07-11
DE69119225T2 (de) 1996-12-12
ES2086540T3 (es) 1996-07-01
WO1991017694A1 (en) 1991-11-28
EP0530227A4 (en) 1993-10-13

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