DE1978995U - WALL PANEL. - Google Patents

Description

RA. 619 835 * 31

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Applicant's Pa. Dr. Kurt Herberts & Oo., Formerly Otto Louis Herberts, '~ ■ "' *" ~ ~ Wuppertal-Barmen, Öhristbusch 25

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': ·; ^ Blackboard

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; "The 'firing concerns one with chalk or similar writing-' , ^ materials writable blackboard, especially as a school blackboard can be used.

,. ^ School boards for school use are produced, among other things, by Glass panes with a, e.g. black or green

. _ir i # '> v ^^ arb.ige.h ^ backside can be' provided ', or that by painting.:,: (,:,:, {■:; iiiii / ^ veneered honeycomb structures with appropriately pigmented: paints' a surface that can be written on with chalk is generated. The :: _{; first} :; method has the technical part · of unnecessary complexity,

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^: φβτ firing is based on the task of producing a teoh -.,! nisch easy to manufacture blackboard, which is largely, glare-free even in an oblique view, but still good.:,;: can be written on with chalk and closed with a dry cloth clean; is.

·,:; ,., = :: The object of the firing is accordingly a description with chalk

', bare blackboard, which is marked by a writing surface

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■ '^ ■' H'J ^ ends '' renewal is matted, i.e. the matting'A-des Pressble-

made of a plastic laminate with an irregularly matted surface, each about 3rd to ^ 8th grain protruding by about 20 - 80 #, preferably about JO - 40 $ above the average height of the other grains and the difference between the greatest height and greatest depth of the the grains forming the matting are about ^ ¹ 1, .2C ^ ', preferably' about 10 (pt:.

With this special new type of matting of the surface of the plastic laminate, the falling as well as the partial Light reflected from the ground is strongly scattered, so that there is extensive freedom from glare, even when viewed at an angle. The blackboard according to the innovation can be easily written on with chalk and clean well with a dry cloth.

, The manufacture of the blackboard according to the innovation can be done in this way that a plastic laminate or a laminate: 'itself:,. is produced in a known manner, on the upper laminate overlying press plate in the sense of the present

Negative of the matting of the laminate surface

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■ d'er:, innovation addressed, will be. ;; ^: . · ^R -: ^ · ^ '.' ■

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Claim to protection

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Claims (1)

P.A.619B35pTia.B7.7 ^ Ρ '' - '■■': '■ Protection claim: Blackboard that can be written on with chalk, marked lehnet i. Writing surface made of one: plastic laminate with one '"■■ ^ irregularly matted surface, each about 3 · to 8. Grain by about 20-80 ^, preferably about 30-40 $ over that average height of the remaining grains protruding and the -difference between greatest height and greatest depth of the mat- forming grains about 5-20 »preferably, about 10 µ '!, • - ■ "is....' ■ '". ' ^; ϊ ^: ί | '' Cii '