GB190421974A - An Improved Blackboard Cleaner. - Google Patents

An Improved Blackboard Cleaner.

Info

Publication number
GB190421974A
GB190421974A GB190421974DA GB190421974A GB 190421974 A GB190421974 A GB 190421974A GB 190421974D A GB190421974D A GB 190421974DA GB 190421974 A GB190421974 A GB 190421974A
Authority
GB
United Kingdom
Prior art keywords
strips
holder
cleaner
blackboards
blackboard cleaner
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
Inventor
Sagar Bearder
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
Application granted granted Critical
Publication of GB190421974A publication Critical patent/GB190421974A/en
Priority to GB190806046D priority Critical patent/GB190806046A/en
Expired legal-status Critical Current

Links

Abstract

21,974. Bearder, S. Oct. 12. Blackboards.-A cleaner for blackboards or the like is constructed so that the felt or like strips can be adjusted or renewed. The strips B, Fig. 2, are clipped in a spring holder A, which is made of steel or other sheet and may be serrated at the edges to increase the grip. A tool D, Fig. 5, is provided to engage in holes in the holder A and expand the holder to permit of adjustment or renewal of the strips B. The strips B may be separated by cardboard or like strips C, perforated or scored at intervals for detachment of the outer edges as the strips B wear down.
GB190421974D 1904-10-12 1904-10-12 An Improved Blackboard Cleaner. Expired GB190421974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB190806046D GB190806046A (en) 1904-10-12 1908-03-18 An Improved Blackboard Cleaner.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190421974T 1904-10-12

Publications (1)

Publication Number Publication Date
GB190421974A true GB190421974A (en) 1905-08-17

Family

ID=32166031

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190421974D Expired GB190421974A (en) 1904-10-12 1904-10-12 An Improved Blackboard Cleaner.

Country Status (1)

Country Link
GB (1) GB190421974A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759212A (en) * 1952-08-08 1956-08-21 Polaroid Corp Applicator devices for applying coatings to photographic prints
US2768403A (en) * 1953-05-27 1956-10-30 Polaroid Corp Applicator device for applying liquid coating to photographic prints

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2759212A (en) * 1952-08-08 1956-08-21 Polaroid Corp Applicator devices for applying coatings to photographic prints
US2768403A (en) * 1953-05-27 1956-10-30 Polaroid Corp Applicator device for applying liquid coating to photographic prints

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