GB500443A - Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tablets - Google Patents
Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tabletsInfo
- Publication number
- GB500443A GB500443A GB2859237A GB2859237A GB500443A GB 500443 A GB500443 A GB 500443A GB 2859237 A GB2859237 A GB 2859237A GB 2859237 A GB2859237 A GB 2859237A GB 500443 A GB500443 A GB 500443A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blackboards
- slates
- glass
- tablets
- improvements relating
- 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
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
- B43L1/10—Writing surfaces thereof
Landscapes
- Printing Methods (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
500,443. Slates, blackboards, &c. LANG, P. R. Oct. 20, 1937, No. 28592. [Class 146 (ii)] A slate, blackboard, or the like of the kind comprising a sheet of glass, ground on one side and coated with a dark coloured substance on the other side is made by roughening the front surface by a well-known acid process, and spraying the rear surface either wholly or partly with a dark pigment. Where the slate &c. is to be provided with columns, squares, &c., the rear surface of the glass is masked, before spraying, by a silk stencil, and the uncoated parts are then either sprayed with a white or light coloured pigment or covered by strips of white paper. The sheet of glass is then enclosed in a frame of wood &c., preferably with a backing of wood, cork composition, or metal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2859237A GB500443A (en) | 1937-10-20 | 1937-10-20 | Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tablets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2859237A GB500443A (en) | 1937-10-20 | 1937-10-20 | Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tablets |
Publications (1)
Publication Number | Publication Date |
---|---|
GB500443A true GB500443A (en) | 1939-02-09 |
Family
ID=10278041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2859237A Expired GB500443A (en) | 1937-10-20 | 1937-10-20 | Improvements relating to slates, blackboards, and other repeatedly useable writing boards and tablets |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB500443A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3484956A (en) * | 1965-09-21 | 1969-12-23 | Pilkington Brothers Ltd | Apparatus for use in the manner of using a blackboard |
GB2206315A (en) * | 1987-06-29 | 1989-01-05 | R B Disenos S A | Wall panel suitable for use as a blackboard |
WO2000030867A1 (en) * | 1998-11-19 | 2000-06-02 | Guardian Llodio, S.A. | Process for fabricating a writing board, and writing board obtained with such process |
-
1937
- 1937-10-20 GB GB2859237A patent/GB500443A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3484956A (en) * | 1965-09-21 | 1969-12-23 | Pilkington Brothers Ltd | Apparatus for use in the manner of using a blackboard |
GB2206315A (en) * | 1987-06-29 | 1989-01-05 | R B Disenos S A | Wall panel suitable for use as a blackboard |
DE3820940A1 (en) * | 1987-06-29 | 1989-01-12 | R B Disenos S A & Christales C | Wall board with panel use |
GB2206315B (en) * | 1987-06-29 | 1992-02-19 | R B Dise Os S A | Wall panel suitable for use as a blackboard and method of manufacture |
WO2000030867A1 (en) * | 1998-11-19 | 2000-06-02 | Guardian Llodio, S.A. | Process for fabricating a writing board, and writing board obtained with such process |
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