EP0305793B1 - Procédé et installation pour la fabrication en continu de crayons - Google Patents

Procédé et installation pour la fabrication en continu de crayons Download PDF

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Publication number
EP0305793B1
EP0305793B1 EP88113202A EP88113202A EP0305793B1 EP 0305793 B1 EP0305793 B1 EP 0305793B1 EP 88113202 A EP88113202 A EP 88113202A EP 88113202 A EP88113202 A EP 88113202A EP 0305793 B1 EP0305793 B1 EP 0305793B1
Authority
EP
European Patent Office
Prior art keywords
liquid
boards
under pressure
drops
fact
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
EP88113202A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0305793A1 (fr
Inventor
Jean-Bernard Chenal
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.)
Caran dAche SA
Original Assignee
Caran dAche SA
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 Caran dAche SA filed Critical Caran dAche SA
Priority to AT88113202T priority Critical patent/ATE68416T1/de
Publication of EP0305793A1 publication Critical patent/EP0305793A1/fr
Application granted granted Critical
Publication of EP0305793B1 publication Critical patent/EP0305793B1/fr
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
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/16—Making non-propelling pencils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1064—Partial cutting [e.g., grooving or incising]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/108—Flash, trim or excess removal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1082—Partial cutting bonded sandwich [e.g., grooving or incising]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing

Definitions

  • the present invention relates to the field of chain production of pencils, and more particularly a method of this manufacture and the installation for the implementation thereof.
  • this technique also has the disadvantage of not being able to be implemented automatically and of achieving an insufficient result as regards marking, since it is practically impossible to distinguish with certainty the small boards marked only by a specific color, when these can be about 80 to 120 in number.
  • DE-C-681364 proposes to spray a protective layer on the two end edges of an already formed pencil.
  • the object of this invention is to provide a method which makes it possible to remedy the aforementioned drawbacks, and which can be implemented entirely automatically and with a marking which is easy to carry out and then to decipher.
  • a second object of the invention consists of a device for implementing the above method, which is defined in claim 5.
  • FIG. 1 is a diagram illustrating a known production line in which the improvement according to the invention is incorporated.
  • Figure 2 is a schematic perspective view showing the arrangement of the marking devices with respect to the movement of the boards.
  • the half-boards 1 are first subjected to a longitudinal grooving operation in a grooving machine 2. Then, in a device 3, after depositing a thread of glue in each groove 5, the leads 4 are arranged in these grooves.
  • This board 1 ′ is subjected to the action of a drum-press 7 so as to securely fix the two half-boards 1 (pressure according to the arrows I).
  • the boards 1 ′ are then trimmed at their transverse ends, so as to free them and thus provide boards with sharp edges, by means of a trimmer 8 (not shown).
  • the coating and marking device 9 is arranged, which is more particularly the subject of the invention. Indeed, after the trimming operation, the boards 1 ′, continuing to advance continuously, are provided on their edges with a layer of protective paint or varnish on the one hand, and on the other hand with a marking identification may include numbers and / or coding letters.
  • One of the main aspects of this invention consists in the particular application of a newly known technology for marking by jet of liquid, for example ink, allowing printing at high speed and with high precision.
  • This technique involves the combined action of a vibrating device of the piezoelectric type and a system for pressurizing an appropriate liquid, forcing it through a nozzle of small diameter, and which leads to the '' obtaining a standardized drop train (emission frequency, diameter of the drops, jet break position).
  • the jet is broken, the drops are individually charged at variable levels, passing between electrodes brought to an adequate electrical potential. The drops then pass between plates brought to a high potential where they undergo a deflection proportional to their charge and in accordance with the desired impact position.
  • a device of the aforementioned type (by example "Willet Printos” from the company Willett Sarl in Paris, or “Jaime 2000” from the company Image in Valence, France), is therefore incorporated into the installation for making pencils, after adaptation for this particular new application.
  • the coating and marking device 9 comprises two generators 12, 13 of jets of pressurized liquid, arranged one after the other. in the direction of travel of the boards 1 ′.
  • the two generators 12, 13 are controlled by a common programmable control unit 14 and are each connected to two print heads 15a, 15b; 16a, 16b, arranged in pairs on either side of the path of travel of the boards 1 ′.
  • the boards 1 ′ travel in the direction of arrow II between the print heads 15a, 15b; 16a, 16b, arranged transversely with respect to this movement on a drive device, generally of the endless type, and which can be constituted by two parallel chains or bands 17, by a single wide band, etc.
  • the boards 1 ′ are positioned on this advance device by means of stop members 18.
  • the sandwich board 1 ′ (A) after having been trimmed at its ends passes first between the heads 15a, 15b which are designed to squirt on the edges of said board 1 ′ (B) a protective base layer 19, for example a varnish.
  • the board 1 ′ (C) is provided on its edges thus coated with a marking or coding 20 (letters, numbers or combination of the two) passing between the heads 16a, 16b, which are designed to print with precision of such signs, corresponding to the hardness of the mines or to their color.
  • a marking or coding 20 letters, numbers or combination of the two
  • the whole of the protection and marking device 9 operates automatically, the control unit common to the two generators 12, 13 being programmable as a function in particular of the running speed of the boards 1 ′, the dimensions of the slices of these to be treated, the nature and characteristics (viscosity, etc.) of the respective liquids to be sprayed, etc.
  • measurement and / or detection members are provided to automatically supply the control unit with the information necessary for its operation, such as the instantaneous position of each board, the dimensions thereof. ci, etc. All these means can be incorporated into the print heads.
  • the pencil manufacturing process can be streamlined.
  • the use of jets under pressure of an appropriate liquid makes it possible to obtain a thin protective coating very quickly dry and the printing without interruption of the scrolling of the boards of marking or coding indications thereon.
  • the same liquid jet technique in the form of droplets can be used, in the continuous manufacturing process of pencils, for the prior gluing either of the grooves, or of the entire grooved surface of the two half -planks forming the "sandwich".
  • a jet device under liquid pressure for example of the type described with reference to the attached drawing, more particularly at the groover and before the drum press.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
EP88113202A 1987-09-04 1988-08-13 Procédé et installation pour la fabrication en continu de crayons Expired - Lifetime EP0305793B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88113202T ATE68416T1 (de) 1987-09-04 1988-08-13 Verfahren und vorrichtung zur herstellung von bleistiften.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3415/87A CH672613A5 (enrdf_load_stackoverflow) 1987-09-04 1987-09-04
CH3415/87 1987-09-04

Publications (2)

Publication Number Publication Date
EP0305793A1 EP0305793A1 (fr) 1989-03-08
EP0305793B1 true EP0305793B1 (fr) 1991-10-16

Family

ID=4255489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113202A Expired - Lifetime EP0305793B1 (fr) 1987-09-04 1988-08-13 Procédé et installation pour la fabrication en continu de crayons

Country Status (6)

Country Link
US (1) US4897142A (enrdf_load_stackoverflow)
EP (1) EP0305793B1 (enrdf_load_stackoverflow)
JP (1) JP2534108B2 (enrdf_load_stackoverflow)
AT (1) ATE68416T1 (enrdf_load_stackoverflow)
CH (1) CH672613A5 (enrdf_load_stackoverflow)
DE (2) DE3865605D1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060147252A1 (en) * 2005-01-03 2006-07-06 Kathleen Torrell Liquid graphite pencil
CN1872922A (zh) * 2005-04-16 2006-12-06 Jakks太平洋有限公司 液体石墨
EP2689938B1 (de) * 2012-07-27 2015-09-09 Faber- Castell AG Verfahren zur Herstellung von holzgefassten Stiften
CN110154583A (zh) * 2019-05-29 2019-08-23 安硕文教用品（上海）股份有限公司 木杆铅笔的一站式生产流程
CN112158006B (zh) * 2020-10-10 2022-01-11 浙江彭胜文教用品股份有限公司 一种塑料铅笔及其生产工艺
CN112810355A (zh) * 2021-02-06 2021-05-18 黑龙江省小书童笔业有限公司 一种指接铅笔的制作方法与指接铅笔
CN112810354A (zh) * 2021-02-06 2021-05-18 黑龙江省小书童笔业有限公司 一种橡皮笔的制作方法与橡皮笔

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR959830A (enrdf_load_stackoverflow) * 1950-04-06
US1783997A (en) * 1928-11-13 1930-12-09 American Lead Pencil Co Apparatus for the manufacture of pencils
DE681364C (de) * 1938-01-14 1939-09-19 Koh I Noor Bleistiftfabrik L & Verfahren zum Aufbringen eines Schutzueberzuges an den Enden von Schreibstiften
US2492250A (en) * 1947-10-21 1949-12-27 California Cedar Prod Leaded slat unit forming machine
US2952204A (en) * 1957-12-11 1960-09-13 Weyerhaeuser Co Method and means for marking articles and for processing marked articles
US3039384A (en) * 1959-08-24 1962-06-19 Lewis A Kingsley Pencil lettering machine
DE1511303A1 (de) * 1966-03-29 1969-05-08 Bleistiftmaschb Dipl Ing Karl Vorrichtung zum Trocknen von Schreibstift-Leimlingen
DE1953985B1 (de) * 1969-10-27 1971-12-23 Bleistiftmaschinenfabrik Fr Eh Verfahren zur Brettchenverleimung in der Bleistiftherstellung
JPS5140895B2 (enrdf_load_stackoverflow) * 1972-12-20 1976-11-06
JPS54105636U (enrdf_load_stackoverflow) * 1977-12-30 1979-07-25
US4228438A (en) * 1979-03-14 1980-10-14 Bell Telephone Laboratories, Incorporated Video jet printer process with radiation cured ink
US4392204A (en) * 1980-12-01 1983-07-05 Prim David F Lumber marking system
JPS58212407A (ja) * 1982-06-03 1983-12-10 ビツグウエイ株式会社 芯の組成分の木軸への浸透を防止した鉛筆型化粧品及びその製造方法
DE3330119A1 (de) * 1983-08-20 1985-03-07 Fa. J.S. Staedtler, 8500 Nürnberg Stift oder kreide und verfahren zu deren herstellung
JPS6049999A (ja) * 1983-08-30 1985-03-19 三菱鉛筆株式会社 鉛筆尾端の塗装方法

Also Published As

Publication number Publication date
EP0305793A1 (fr) 1989-03-08
DE3865605D1 (de) 1991-11-21
JPS6471799A (en) 1989-03-16
CH672613A5 (enrdf_load_stackoverflow) 1989-12-15
US4897142A (en) 1990-01-30
DE305793T1 (de) 1989-06-22
ATE68416T1 (de) 1991-11-15
JP2534108B2 (ja) 1996-09-11

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