US3854825A - Refillable pencil - Google Patents

Refillable pencil Download PDF

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Publication number
US3854825A
US3854825A US00347472A US34747273A US3854825A US 3854825 A US3854825 A US 3854825A US 00347472 A US00347472 A US 00347472A US 34747273 A US34747273 A US 34747273A US 3854825 A US3854825 A US 3854825A
Authority
US
United States
Prior art keywords
lead
holding member
sliding
tongues
spring
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
US00347472A
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English (en)
Inventor
A Girella
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.)
FAB SUISSE DE CRAYONS CARAN D
Original Assignee
FAB SUISSE DE CRAYONS CARAN D
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 FAB SUISSE DE CRAYONS CARAN D filed Critical FAB SUISSE DE CRAYONS CARAN D
Application granted granted Critical
Publication of US3854825A publication Critical patent/US3854825A/en
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

  • Cited member whereby the construction of the pencil is UNITED STATES PATENTS simplified and its manufacturing costs are reduced. 2,243,109 5/1941 Lynn, 401/65 2 Claims, 4 Drawing Figures REFILLABLE PENCIL BACKGROUND OF THE INVENTION
  • the present invention relates to refillable pencils and more particularly to an improved refillable pencil of simplified construction, which can be manufactured at low cost.
  • Known refillable pencils comprise a hollow body member, a tubular membe slidingly disposed in said hollow body member for receiving a lead, said tubular member comprising at one of its ends a clamp for releasably locking said lead and at its other end a push button projecting from said hollow body member, for allowing a user to displace said sliding tubular member against the biasing action of a compressible spring, an annular member of wedge shaped longitudinal section being disposed, between said locking clamp and the inner surface of a wall portion of said hollow body member, for displacement between two stop means disposed fixedly relative to said hollow body member, whereby to allow said locking clamp to be tightened and said sliding tubular member to be simultaneously locked, against the biasing action of said compressible spring, when said annular member engages one of said stop means and to allow said locking clamp to be released, when said annular member engages the other one of said stop means, said hollow body member comprising a frictional clamp for braking said lead.
  • a principal object of the present invention is to provide a refillable pencil comprising a hollow body member, a tubular member slidingly disposed in said hollow body member for receiving a lead, a clamp means for releaseably locking said lead, a means for allowing a user to actuate said tubular member against an resilient said hollow body member are made of injected plastic material.
  • a further object of the invention is to provide a refillable pencil, wherein said sliding tubular member defines a passage, which isopen at both ends, whereby to allow the introducing of the lead at the rear end or at surface of a wall portion of said sliding tubular member, whereby to retain said sliding tubular member against the biasing action of said resilient means, when there is no lead in the pencil.
  • Still another object of the invention is to provide a refillable pencil, wherein said clamp of said sliding tubular member has roughened surfaces for enhancing its frictional force on said lead.
  • FIGS. 3 and 4 are enlarged fragmentary sectional views showing portions of FIGS. 1 and 2 respectively.
  • the refillable pencil shown in FIGS. 1 to 4 of the accompanying drawing comprises a hollow body I made of injected plastic material, an end 2 of which is provided with a bore 3 for guiding a lead 4.
  • the bore 3 extends in the direction of the interior of the hollow body 1.
  • the hollow body 1 is provided with small tongues 5 forming integral portions thereof and constituting a clamp for braking the lead 4, the brakng action being obtained by means of the elastic friction of thetongues 5 on the lead 4.
  • a tubular member 6 In the inner space of the hollow body 1 is slidingly disposed a tubular member 6, an end of which is split in form of small tongues 7 constituting a clamp 7 for releaseably locking the lead 4.
  • the tongues 7 are surrounded by an annular member 8 having a wedge shaped longitudinalsection and which is disposed for sliding movement between a' stop means formed by an annular shoulder 9 of the inner surface of a wall portion of the hollow body 1 and another stop means formed by a rim 10 of a sleeve 11 disposed in the hollow body 1.
  • the rim 10 of the sleeve 11 also supports one of the ends of a helical spring 12 surroundingthe sliding tubular member 6, the other end of the spring 12 being supported by a shoulder 13 of the member 6.
  • the sliding tubular member 6 extends substantially over the whole length of the hollow body 1 and forms 'at the rear end of the body 1 a projection constituting a pushbutton 14 to be pressed by the user of the refillable pencil, for moving the lead 4 out of the pencil.
  • the sliding tubular member 6 is provided on its outer wall surface with an annular rib disposed for cooperation with an annular rib 16 located on the inner wall surface of the hollow body 1.
  • the sliding tubular member 6 is open at both ends, thus allowing the lead 4 to be introduced in the pencil at the front end or at the rear end of this pencil.
  • the spring 12 urges the tubular member 6 in its rear position and the annular member 8 presses the tongues 7 of the locking clamp 7 against the lead 4, the sloping outer surfaces of the small tongues 7 cooperating with the associated truncated cone shaped inner surface of the annular member 8.
  • the structural parts of the refillable pencil are during writing in the position shown in FIG. 1.
  • the user may press on the push-button 14 for displacing the sliding 6 placement, the annular member 8 and the tongues 7 are displaced in an interlocked relationship, the pressure exerted by the tongues 7 on the lead 4 being maintained. Accordingly, the lead 4.advances together with the tubular member 6 until the annular member 8 engages the stop shoulder 9. Then the continuation of the advancing movement of the tubular member 6 causes the tongues 7 to be released from the annular member 8, the locking action of the tongues 7 on the lead 4 being suppressed, as illustrated in FIGS. 2 and 4.
  • the spring 12 returns the sliding tubular member 6 in its position shown in FIG. 3, the sliding annular member 8 being pulled rearward by the tubular member 6.
  • the tongues 7 wedge themselves in between the member 8 and the lead 4, whereby the lead 4 is locked.
  • the lead 4 remains immobile owing to the braking action of the tongues 5.
  • small grooves or projections may, of course, be provided on surfaces of n the tongues 7, which cooperate with the-lead 4.
  • a mechanical lead pencil comprising a hollow body including a bored lead receiving end, return spring within said body, a sliding tubular lead holding member within said body and having a portion thereof surrounded by said spring, said body and, said lead holding member both made of plastic material possessing limited resilience, said lead holding member including at one end a plurality of clamping tongues to clamp the lead and at the opposite end a pushbutton projecting out of the end of said body opposite said lead receiving end to permit the user to move the sliding lead holding member against the action of said return' spring, a wedge shaped annular member disposed between said tongues and the inner wall of said hollow body, first and second stop means above and below said annular member, the engagement of said annular member with said second stop means ensuring the clamping of said tongues and simultaneously locking said lead holding member against the action of said spring, the engagement of said annular member with said first stop means ensuring the release of said tongues, braking tongues in said hollow body exerting friction against said lead, the inner wall of said hollow body provided with an annular rib, the outer

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US00347472A 1972-10-03 1973-04-03 Refillable pencil Expired - Lifetime US3854825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1440272A CH555247A (de) 1972-10-03 1972-10-03 Porte-mine.

Publications (1)

Publication Number Publication Date
US3854825A true US3854825A (en) 1974-12-17

Family

ID=4400538

Family Applications (1)

Application Number Title Priority Date Filing Date
US00347472A Expired - Lifetime US3854825A (en) 1972-10-03 1973-04-03 Refillable pencil

Country Status (5)

Country Link
US (1) US3854825A (enrdf_load_stackoverflow)
AT (1) AT329406B (enrdf_load_stackoverflow)
CH (1) CH555247A (enrdf_load_stackoverflow)
DE (1) DE2304372A1 (enrdf_load_stackoverflow)
FR (1) FR2201187B3 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386865A (en) * 1979-12-28 1983-06-07 Kotobuki & Co., Ltd. Automatic sharp pencil
US4798310A (en) * 1986-05-20 1989-01-17 Platinum Pen Co., Ltd. Article storage container
US5165813A (en) * 1991-07-23 1992-11-24 Kotobuki & Co., Ltd. Container with snap-in chuck and chuck ring
US5362166A (en) * 1993-06-28 1994-11-08 Kotobuki & Co., Ltd. Flat stick-shaped material propelling container

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2423486A1 (fr) * 1978-04-19 1979-11-16 Roussel Uclaf Nouveau reactif d'epoxydation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2243109A (en) * 1940-04-29 1941-05-27 Dur O Lite Peneil Company Mechanical pencil
US2473149A (en) * 1945-09-07 1949-06-14 American Lead Pencil Co Mechanical pencil with step-by-steplead feeding means
US2496554A (en) * 1946-12-18 1950-02-07 Lynn Gary Mechanical pencil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2243109A (en) * 1940-04-29 1941-05-27 Dur O Lite Peneil Company Mechanical pencil
US2473149A (en) * 1945-09-07 1949-06-14 American Lead Pencil Co Mechanical pencil with step-by-steplead feeding means
US2496554A (en) * 1946-12-18 1950-02-07 Lynn Gary Mechanical pencil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386865A (en) * 1979-12-28 1983-06-07 Kotobuki & Co., Ltd. Automatic sharp pencil
US4798310A (en) * 1986-05-20 1989-01-17 Platinum Pen Co., Ltd. Article storage container
US5165813A (en) * 1991-07-23 1992-11-24 Kotobuki & Co., Ltd. Container with snap-in chuck and chuck ring
US5362166A (en) * 1993-06-28 1994-11-08 Kotobuki & Co., Ltd. Flat stick-shaped material propelling container

Also Published As

Publication number Publication date
AT329406B (de) 1976-05-10
FR2201187A1 (enrdf_load_stackoverflow) 1974-04-26
CH555247A (de) 1974-10-31
FR2201187B3 (enrdf_load_stackoverflow) 1976-08-27
DE2304372A1 (de) 1974-04-11
ATA74773A (de) 1975-07-15

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