BE559714A

BE559714A -

Info

Publication number: BE559714A
Authority: BE

Description

       

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   Un petit moteur électrique est monté dans une monture adéquate représenté au dessin   annexé.-(FIG   1 - A ) 
En bout d'arbre il est monté un support adéquat destiné a supporter la gomme .-(FIG 1 - B ) 
Un interrupteur a pression est prévu pour la mise en marche de la   machine .-   ( FIG 1 - C) 

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Une housse prolonge le tout formant réservoir à piles.-   (FIG 1 - D )    
Le tout est fermé par un couvercle.- (FIG 1 - E) 
Dans le support B est inséré a pression plus ou moins dur une gomme de forme cylindrique.- (FIG 1 - G) *** 
III.- Fonctionnement de l'invention      
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   A small electric motor is mounted in a suitable mounting shown in the accompanying drawing .- (FIG 1 - A)
At the end of the shaft there is mounted a suitable support intended to support the rubber .- (FIG 1 - B)
A pressure switch is provided for starting the machine .- (FIG 1 - C)

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A cover extends the whole forming battery tank - (FIG 1 - D)
Everything is closed by a cover - (FIG 1 - E)
In the support B is inserted under pressure more or less hard a cylindrical rubber - (FIG 1 - G) ***
III.- Operation of the invention
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Claims

When the engine is started, the rubber G takes a rotational movement. In FIG 2 the contact with the sheet of paper has been enlarged 10 'times clearly showing the process of the invention .-, The eraser being driven by a rotational movement of more than 3,000 revolutions per minute and the diameter of the eraser being 4 mm, the peripheral linear speed will therefore be:

3.000 x 3.14 x 0.04 37.68 meters per minute or 0.62 m per second. Experimentally, it is easy to establish that by hand it is impossible to obtain a linear erasing speed greater than 0.20 meters per second. Experimentally, too, it is easy to see that even the best eraser moved slowly on the paper does not erase anything at all.- It is therefore the speed of the linear movement that allows the gum to erase.- It turned out that the most favorable linear speed for the exfoliation process was between 0.30 and 0.70 meters per second. The present electric eraser therefore responds well to the optimum conditions for exfoliation.

- Claims.- - - - - - - - - - - - - - 1.- Electric eraser characterized by the fact that the gumming is no longer obtained by the lateral displacement of the eraser on the paper, but by the circular movement which is printed on a cylindrical rubber by means of an electric motor. 2.- Electric rubber characterized by:

is that the engine <Desc / Clms Page number 3> prints a circular movement to the eraser, ensuring a peripheral speed between 0.30 and 0.70 meters per second. - 3.- Electric rubber constructed using modern plastics in such a way that their qualities of plasticity, elasticity and resistance - are used judiciously and to the maximum of their respective qualities.

4.- Electric eraser which is started by a pressure switch forcing the operator to press the button to keep the engine running. 5.- Electric eraser allowing corrections to be made with the typewriter without moving the paper, up to dress between the striking guides.- 6.- Electric eraser characterized by the fact that thanks to the plasticity of the eraser support any eraser cut to suitable size can be inserted therein without difficulty and. remain sufficiently in place to ensure the exfoliation operations. - 7.- Eraser.

-electric which as a variant of all the above can be powered by the mains (through a transformer) instead of batteries as provided here, -