FR2396658A1 - Double end holder for sticks of chalk - has screwed sleeves with slots receiving plunger pins to push chalk in or out as required - Google Patents

Double end holder for sticks of chalk - has screwed sleeves with slots receiving plunger pins to push chalk in or out as required

Info

Publication number
FR2396658A1
FR2396658A1 FR7721848A FR7721848A FR2396658A1 FR 2396658 A1 FR2396658 A1 FR 2396658A1 FR 7721848 A FR7721848 A FR 7721848A FR 7721848 A FR7721848 A FR 7721848A FR 2396658 A1 FR2396658 A1 FR 2396658A1
Authority
FR
France
Prior art keywords
chalk
tube
sticks
push
double end
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.)
Withdrawn
Application number
FR7721848A
Other languages
French (fr)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7721848A priority Critical patent/FR2396658A1/en
Publication of FR2396658A1 publication Critical patent/FR2396658A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K27/00—Multiple-point writing implements, e.g. multicolour; Combinations of writing implements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/016—Holders for crayons or chalks

Landscapes

  • Reciprocating Pumps (AREA)
  • Coating Apparatus (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

A double ended holder for sticks of coloured chalk consists of two pieces of tube attached to a central boss. Each tube has two diametrically opposite longitudinal slot. A piston which slides in the tube has radial pins which project through the slots. A stick of chalk is pushed inside the tube on top of the piston. An outer sleeve with a double start internal thread is placed over the tube and engages the projecting pins. When the sleeve is rotated the chalk is pushed in or out of the tube as far as is required.
FR7721848A 1977-07-08 1977-07-08 Double end holder for sticks of chalk - has screwed sleeves with slots receiving plunger pins to push chalk in or out as required Withdrawn FR2396658A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7721848A FR2396658A1 (en) 1977-07-08 1977-07-08 Double end holder for sticks of chalk - has screwed sleeves with slots receiving plunger pins to push chalk in or out as required

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7721848A FR2396658A1 (en) 1977-07-08 1977-07-08 Double end holder for sticks of chalk - has screwed sleeves with slots receiving plunger pins to push chalk in or out as required

Publications (1)

Publication Number Publication Date
FR2396658A1 true FR2396658A1 (en) 1979-02-02

Family

ID=9193416

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7721848A Withdrawn FR2396658A1 (en) 1977-07-08 1977-07-08 Double end holder for sticks of chalk - has screwed sleeves with slots receiving plunger pins to push chalk in or out as required

Country Status (1)

Country Link
FR (1) FR2396658A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103568642A (en) * 2013-11-06 2014-02-12 上海电力学院 Automatic chalk sleeve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103568642A (en) * 2013-11-06 2014-02-12 上海电力学院 Automatic chalk sleeve
CN103568642B (en) * 2013-11-06 2015-08-12 上海电力学院 Propelling chalk sleeve

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Legal Events

Date Code Title Description
ST Notification of lapse