BG49303A1 - Blackboard - Google Patents
BlackboardInfo
- Publication number
- BG49303A1 BG49303A1 BG9025889A BG9025889A BG49303A1 BG 49303 A1 BG49303 A1 BG 49303A1 BG 9025889 A BG9025889 A BG 9025889A BG 9025889 A BG9025889 A BG 9025889A BG 49303 A1 BG49303 A1 BG 49303A1
- Authority
- BG
- Bulgaria
- Prior art keywords
- bath
- wiping
- endless tape
- wiping sponge
- operable walls
- Prior art date
Links
Landscapes
- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
- Drawing Aids And Blackboards (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The black board is intended for use at schools and universities. It has a simplified construction and may be cleaned very effectively, which improves hygienic conditions. It includes a frame (1) with two rolls (4), around which is stretched a flexible endless tape (5), actuated by a motor-reductor group (7). The bottom roll (4) is enveloped by a bath (10) with a cleaning liquid. The bath (10) has a borne wiping cylinder, consisting of a shaft (11) with an attached to it wiping sponge (12) with a profile of irregular hexagon, formed by three short operable walls and three long non-operable walls. It also has a fixator (13) for situating the wiping sponge (12) in various positions toward the endless tape (5). The washing liquid contains water with solved in it citric acid and a conservant. The top front end of the bath (10) is affixed motively to a cleaning plate (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG9025889A BG49303A1 (en) | 1989-11-03 | 1989-11-03 | Blackboard |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG9025889A BG49303A1 (en) | 1989-11-03 | 1989-11-03 | Blackboard |
Publications (1)
Publication Number | Publication Date |
---|---|
BG49303A1 true BG49303A1 (en) | 1991-10-15 |
Family
ID=3922448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BG9025889A BG49303A1 (en) | 1989-11-03 | 1989-11-03 | Blackboard |
Country Status (1)
Country | Link |
---|---|
BG (1) | BG49303A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102616065A (en) * | 2012-04-02 | 2012-08-01 | 张春平 | Remote control type dustless blackboard eraser |
CN103253046A (en) * | 2013-05-24 | 2013-08-21 | 东北大学 | Wet-type and dust-free blackboard cleaner |
-
1989
- 1989-11-03 BG BG9025889A patent/BG49303A1/en unknown
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102616065A (en) * | 2012-04-02 | 2012-08-01 | 张春平 | Remote control type dustless blackboard eraser |
CN103253046A (en) * | 2013-05-24 | 2013-08-21 | 东北大学 | Wet-type and dust-free blackboard cleaner |
CN103253046B (en) * | 2013-05-24 | 2015-01-28 | 东北大学 | Wet-type and dust-free blackboard cleaner |
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