GB936312A - The roller blackboard - Google Patents

The roller blackboard

Info

Publication number
GB936312A
GB936312A GB630361A GB630361A GB936312A GB 936312 A GB936312 A GB 936312A GB 630361 A GB630361 A GB 630361A GB 630361 A GB630361 A GB 630361A GB 936312 A GB936312 A GB 936312A
Authority
GB
United Kingdom
Prior art keywords
band
rollers
roller
blackboard
treadlecontrolled
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
Application number
GB630361A
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 GB630361A priority Critical patent/GB936312A/en
Publication of GB936312A publication Critical patent/GB936312A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04—Blackboards
    • B43L1/08—Blackboards flexible

Landscapes

  • Drawing Aids And Blackboards (AREA)

Abstract

936,312. Blackboards. J. COLL. May 21, 1962 [Feb. 21, 1961], No. 6303/61. Class 146 (2). A blackboard consists of an endless band 1 of dark pigmented polyvinyl chloride passing around rollers 2, 3 adjustable for tensioning the band, and is provided with an erasing device consisting of a tensioned strip of felt 8 engaging the band 1 where it passes around the roller 2. The rollers 2, 3 may be supported by wall brackets or by a portable frame. Pulleys 6 at the ends of the rollers 2, 3 may be rotated by a hand cord 7 to move the band 1, or a treadlecontrolled motor may be geared to the roller 2 for this purpose. A backing board 4 is provided for the working surface of the band 1.
GB630361A 1961-02-21 1961-02-21 The roller blackboard Expired GB936312A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB630361A GB936312A (en) 1961-02-21 1961-02-21 The roller blackboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB630361A GB936312A (en) 1961-02-21 1961-02-21 The roller blackboard

Publications (1)

Publication Number Publication Date
GB936312A true GB936312A (en) 1963-09-11

Family

ID=9812039

Family Applications (1)

Application Number Title Priority Date Filing Date
GB630361A Expired GB936312A (en) 1961-02-21 1961-02-21 The roller blackboard

Country Status (1)

Country Link
GB (1) GB936312A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397032A1 (en) * 1977-07-08 1979-02-02 Visu Int De WORKING TABLE
CN106114004A (en) * 2016-07-12 2016-11-16 苏州和氏设计营造股份有限公司 Electronic signature reel device
CN109109528A (en) * 2018-09-13 2019-01-01 周贤昊 It is a kind of to exempt to wipe dustproof blackboard automatically

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397032A1 (en) * 1977-07-08 1979-02-02 Visu Int De WORKING TABLE
CN106114004A (en) * 2016-07-12 2016-11-16 苏州和氏设计营造股份有限公司 Electronic signature reel device
CN109109528A (en) * 2018-09-13 2019-01-01 周贤昊 It is a kind of to exempt to wipe dustproof blackboard automatically

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