DE315975C - - Google Patents
Info
- Publication number
- DE315975C DE315975C DENDAT315975D DE315975DA DE315975C DE 315975 C DE315975 C DE 315975C DE NDAT315975 D DENDAT315975 D DE NDAT315975D DE 315975D A DE315975D A DE 315975DA DE 315975 C DE315975 C DE 315975C
- Authority
- DE
- Germany
- Prior art keywords
- mass
- writing
- pressed
- lines
- filled
- 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.)
- Active
Links
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
Description
Vorliegende Erfindung betrifft eine Schreibtafel, die in" bekannter Weise durch Zusammenpressen von fein zerkleinerten Holz- und Mineralstoffen unter gewaltigem Druck erzeugt wird. Das Neue besteht darin, daß die Liniierung auf beiden Schreibflächen versetzt angeordnet, keilförmig in die Tafelgrundmasse eingepreßt und mit einer gleichen, jedoch anders gefärbten Masse wie die Grundmasse ausgefüllt ist, zwecks Herbeiführung einer ebenen Schreibfläche, die infolge nachträglicher Hochglanzabschleifung ein jederzeitiges Weglöschen von Blei-, Färb- und Tintenschriftzügen gestattet.The present invention relates to a writing board which can be made in a "known manner" by pressing together is produced from finely chopped wood and minerals under tremendous pressure. The new thing is that the The lines on both writing surfaces are offset arranged, wedge-shaped pressed into the table base and with the same, but differently colored mass as the basic mass is filled, for the purpose of bringing about a flat writing surface, which as a result of subsequent High-gloss sanding a permanent erasure of lead, dye and Ink lettering permitted.
Die Erfindung ist in beiliegender Zeichnung in einem Querschnitt durch die Tafel dargestellt. Die Tafelgrimdmasse wird zunächst in Formen gebracht, von denen die eine Formhälfte die Liniierung c und die andere die Liniierung d trägt. Unter Zusatz von bekannten Bindemitteln erfolgt nunmehr eine Zusammenpressung bis auf den dritten Teil der Dicke der zwischen den Formen aufgegebenen Masse. Nach fast vollständiger Abbindung werden die Formen beseitigt und darauf gefärbte Liniiermasse von gleicher Substanz wie die Tafelmasse zugefügt, um die entstandenen Vertiefungen der Liniierung dicht lind haltbar auszufüllen. Hierauf findet ein Abschleifen der Schreibfläche bis zum Hochglanz statt, wodurch insbesondere das Weglöschen von aufgebrachten Blei-, Farb- und Tintenstiftzeichen ohne jede . Schwierigkeit ermöglicht wird.The invention is shown in the accompanying drawing in a cross section through the panel. The Tafelgrimdstoff is first brought into molds, one half of which bears the lines c and the other half the lines d. With the addition of known binders, compression now takes place down to the third part of the thickness of the mass applied between the molds. After almost complete setting, the forms are removed and colored ruling compound of the same substance as the table compound is added to it, in order to fill the resulting indentations of the ruling tightly and durably. The writing surface is then sanded down to a high gloss, as a result of which, in particular, applied lead, color and ink pen marks are erased without any. Difficulty is made possible.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE315975C true DE315975C (en) |
Family
ID=568705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT315975D Active DE315975C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE315975C (en) |
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0
- DE DENDAT315975D patent/DE315975C/de active Active
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