Single stretch board wiper

            Here i am giving a small mini project idea, which can be done so easily. The main objective of this project is to reduce the time of wiping the board while taking classes. We can see that we are loosing much time while the faculties are wiping the boards. (Meanwhile many may be relaxing while this extra time!!.)

            So by doing this project we can save a lot of time. The construction is simple, and we can erase the board very easily. The board wiper is a hand operated mechanism. The operation of wiping in a single stretch is done by using a clad roller and a duster holder. This mechanism is simple, compact and concise.

WORKING

• Two guideways are fixed, one at the top and other at the bottom of the board with respect to the board size.
• One end of the duster bar is connected to the roller which rolls inside the guideway.
•  Other end of duster bar is also fixed to roller which rolls at the body of guideway.
• Duster is fixed at one side of the rod.
• When the rod is moved with force it wipes out the entire board at one stretch.
• The above figure shows the demonstration of the single stretch board...try it.