EP0357833A1 - Minenschreibgerät - Google Patents

Minenschreibgerät Download PDF

Info

Publication number
EP0357833A1
EP0357833A1 EP88114829A EP88114829A EP0357833A1 EP 0357833 A1 EP0357833 A1 EP 0357833A1 EP 88114829 A EP88114829 A EP 88114829A EP 88114829 A EP88114829 A EP 88114829A EP 0357833 A1 EP0357833 A1 EP 0357833A1
Authority
EP
European Patent Office
Prior art keywords
inner tube
outer casing
writing implement
tube
leads
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.)
Ceased
Application number
EP88114829A
Other languages
English (en)
French (fr)
Inventor
Chun Liang Kuo
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.)
Pencell Co Ltd
Original Assignee
Pencell Co Ltd
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 Pencell Co Ltd filed Critical Pencell Co Ltd
Priority to EP88114829A priority Critical patent/EP0357833A1/de
Priority to AU23705/88A priority patent/AU611208B2/en
Publication of EP0357833A1 publication Critical patent/EP0357833A1/de
Ceased 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
    • 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
    • B43K24/023—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions with a deformable barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/003—Propelling pencils with lead sections or lead cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/006—Pencil-barrels

Definitions

  • the present invention relates to a useful writing implement and, more particularly to an improved writing implement which utilizes an in­tegral hook-shaped leg which is integrally formed on an outer casing, and laterally inserted into an inner tube through a longitudinal slot provided at the lower end of the inner tube in order to allow the expell­ing and feeding of presharpened pieces of pencil lead.
  • a coil spring which has a lower end formed into a hook which slides along the slot formed between the clamp­ing halves of the inner tube, is used for the expelling and feeding of presharpened pieces of pencil lead into the space between said two clamp­ing halves.
  • a coil spring is integrally formed with an un­symmetrical hook-shaped end which can not be mass-produced, and is easily removed from the slot of the inner tube if the latter is slightly rotated by mistake, because said slot is very thin and said hook-shaped end is unsymmetrical. This will cause the entire writing implement becomes unusable.
  • the writing implement comprises an outer casing, an inner tube inserted into the outer casing, for storing a plurality of presharpened leads arranged in series.
  • the upper end of the outer casing is integrally formed with a protrudent flexible elongated reduced neck portion for releasably engaging the upper enlarged portion of the inner tube.
  • the neck portion is provided with a lateral flat protrusion for partially covering the upper open end of the inner tube, for preventing said presharpened leads from slipping out of the inner tube.
  • the lower end of the outer casing is integrally formed with a de­pendent leg which is laterally inserted through a longitudinal slot provided at the lower end of the inner tube into the inner tube in order to allow the expelling and feeding of presharpened pencil leads.
  • the writing implement of the present in­vention mainly comprises an outer casing 1 and an inner tube 2 for stor­ing a plurality of presharpened leads 3 arranged in series, which is in­serted into the outer casing 1.
  • the outer casing 1 is made of a plastic material by molding in a tube with an upper open end for receiving the inner tube therefrom and a lower frusto-conical end.
  • the upper end of the outer casing is integrally formed with a protrudent flexible elongated reduced neck portion 11 having a recess 114 for releasably engaging the upper enlarged portion 21 of the inner tube 2.
  • the neck portion 11 is in­tegrally formed with a lateral triangular flat protrusion 111 for cover­ing the upper open end of the inner tube for preventing the presharpened leads from slipping out of the inner tube. Hence, no additional cap means is required.
  • the lower frusto-conical end of the outer casing 1 is integrally formed with a V-shaped groove at the side wall thereof, which is oppos­ ing the longitudinal axis of the neck portion 11, in order to form a de­pendent leg 12 which is integrally formed with an inward hook-shaped por­tion 121 for lateral insertion into the inner tube 2 through a lon­gitudinal slot 23 provided at the lower end of the inner tube 2 in order to expel part of the lowermost presharpened pencil lead from the lower end of the inner tube by means of movement of the inner tube as shown in Fig. 4.
  • the hook-shaped portion 121 of the leg 12 will be forced to ex­tend into the slot 23 on the merits of the elasticity of the material per se by the slide side wall of the inner tube when the inner tube is moved downward.
  • the inner tube 2 is also made of a plastic material in a tube.
  • the interior of the inner tube is provided with a channel 27 for storing a plurality of pencil leads 3 arranged in series.
  • the lowermost end of channel 27 is formed into a lower reduced tube channel 22 having a slightly smaller diameter for preventing the lowermost piece of pencil lead 3 from passing therethrough, so that the lead 3 is held within the inner tube 2.
  • new leads are fed into inner tube 2. As shown in Figs.
  • the lower outer peripheral wall 24 of the inner tube 2 is longitudinally integrally formed with a longitudinal groove 241 at a position confronting the lon­gitudinal slot 23 for serving as a center of bending of the lower outer peripheral wall 24 which has a C-shaped cross-section by forming a lon­gitudinal slot 23, in order that the channel 22 can be slightly expanded by the pencil lead 3 when the latter passes therethrough.
  • the upper closed end of slot 23 has a longitudinal slide groove wall 25 formed for sliding of the hook-shaped portion 121 of leg 12 thereon.
  • the outer peripheral wall of the inner tube 2 is integrally formed with an upper annular protrusion 26′ and a lower annular protrusion 26 for serving as the guides for sliding on the inner wall of the outer casing 1.
  • the lower reduced tube channel 22 may be provided with a plurality of longitudinal small guide protrusions 221 on the inner wall thereof which are spaced in equal distance, for easily holding or guiding a pencil lead which is to be held or expelled from the inner tube.
  • Figs. 2 through 5 show the various stages involved in operating the present invention.
  • the lead pieces are stored in a front-to-end fashion with the sharpened end of each piece being pointed towards the writing end of the present pencil.
  • Fig. 2 shows the pencil before being used.
  • the user starts to pull inner tube 2 downwardly with his thumb by the upper enlarged portion 21 as shown in Fig. 3.
  • the lowermost end of channel 27 is fully projected outside outer casing.
  • the slide groove wall 25 reaches the hook-shaped portion 121, the latter will be forced to extend into the slot 23 on the merits of the elasticity of the material per se, and will slide on the slide groove wall 25 until the upper enlarged portion 21 reaches the end wall of the upper open end of the outer casing 1.
  • the lowermost end piece of pencil lead in the inner tube 2 is no longer blocked by the hook-shaped portion 121 and is subsequently released. It falls automatically through the foremost end of tube channel 27 by its gravity. However, since the lower­most tube channel 22 is slightly smaller in diameter than lead 3, the lead is thus retained therein as shown in Fig. 3. The user then pushes the inner tube 2 upwardly with the same thumb until its upper enlarged portion 21 engages with the recess 114 of the outer casing 1. As a result, the lowermost end of channel 27 is withdrawn into the outer casing 1, and the hook-shaped portion is removed from the slide side wall 25 and inserted into the tube channel through slot 23.
  • the pencil lead used or not used, can be withdrawn into the inner tube by simply pushing the front end of the ex­posed pencil lead against any surface such as a table top as shown in Fig. 6.
  • Fig. 7 Shown in Fig. 7 is the second embodiment of the present invention, it differs from the above embodiment in that first, an integral tube ex­tension 11′ having a lateral opening 14 is used instead of the neck por­tion 11; second, a coil spring 4 is further provided between the annular protrusion 26 which is integrally formed on the inner tube 2 and the up­per inner periphery of the lower frusto-conical end of the outer casing 1, for forcing the inner tube back to its original position without the aid of thumb after the inner tube has been moved to a lower position; third, an eraser block 112 is provided on the upper end of the integral tube extension 11′, and the outer casing 1 is further integrally formed with a clip member 13.
  • Fig. 9 shows an embodiment of a plastic spare tube 5 filled with a plurality of presharpened pencil leads.
  • the leads used in the present invention will not be limited to pen­cil leads.
  • Other working implements which can utilize the construction of the present invention and, therefore, are within the scope thereof in­cluding colored pencils, crayons, paraffin pencils, and the like.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
EP88114829A 1988-09-09 1988-09-09 Minenschreibgerät Ceased EP0357833A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP88114829A EP0357833A1 (de) 1988-09-09 1988-09-09 Minenschreibgerät
AU23705/88A AU611208B2 (en) 1988-09-09 1988-10-13 Useful writing implement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88114829A EP0357833A1 (de) 1988-09-09 1988-09-09 Minenschreibgerät

Publications (1)

Publication Number Publication Date
EP0357833A1 true EP0357833A1 (de) 1990-03-14

Family

ID=8199295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114829A Ceased EP0357833A1 (de) 1988-09-09 1988-09-09 Minenschreibgerät

Country Status (2)

Country Link
EP (1) EP0357833A1 (de)
AU (1) AU611208B2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419745A1 (de) * 1989-08-14 1991-04-03 Pencell Company, Ltd Mechanisch gesteuertes Schreibgerät mit zugespitzten Bleistifstücken
US6755584B2 (en) 2002-01-24 2004-06-29 Bic Corporation Writing instrument

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE137288C (de) *
DE67601C (de) * A. FOR-N AN DER in New-York, 244 Sixth Avenue Blei- und Farbstifthalter
US1378174A (en) * 1920-01-28 1921-05-17 Kaiser Ferdinand Pencil
US2076470A (en) * 1936-08-10 1937-04-06 John A Leimer Magazine pencil
US2881735A (en) * 1954-12-01 1959-04-14 Burnie M Craig Retractable writing instrument
US4515492A (en) * 1983-06-01 1985-05-07 Shan Chen J Writing implement and kit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2023508B (en) * 1978-06-14 1982-04-28 Chun Liang Kuo Writing implement
GB2121729A (en) * 1982-05-28 1984-01-04 Chao Yuan Lin Writing implement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE137288C (de) *
DE67601C (de) * A. FOR-N AN DER in New-York, 244 Sixth Avenue Blei- und Farbstifthalter
US1378174A (en) * 1920-01-28 1921-05-17 Kaiser Ferdinand Pencil
US2076470A (en) * 1936-08-10 1937-04-06 John A Leimer Magazine pencil
US2881735A (en) * 1954-12-01 1959-04-14 Burnie M Craig Retractable writing instrument
US4515492A (en) * 1983-06-01 1985-05-07 Shan Chen J Writing implement and kit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419745A1 (de) * 1989-08-14 1991-04-03 Pencell Company, Ltd Mechanisch gesteuertes Schreibgerät mit zugespitzten Bleistifstücken
US6755584B2 (en) 2002-01-24 2004-06-29 Bic Corporation Writing instrument

Also Published As

Publication number Publication date
AU611208B2 (en) 1991-06-06
AU2370588A (en) 1990-04-26

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