US1438154A - Manufacture of enameled writing tablets - Google Patents
Manufacture of enameled writing tablets Download PDFInfo
- Publication number
- US1438154A US1438154A US472864A US47286421A US1438154A US 1438154 A US1438154 A US 1438154A US 472864 A US472864 A US 472864A US 47286421 A US47286421 A US 47286421A US 1438154 A US1438154 A US 1438154A
- Authority
- US
- United States
- Prior art keywords
- enamel
- enameled
- manufacture
- writing tablets
- tablets
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 210000003298 dental enamel Anatomy 0.000 description 10
- 239000002320 enamel (paints) Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000004927 clay Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010454 slate Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000004150 EU approved colour Substances 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001610 cryolite Inorganic materials 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 229940006093 opthalmologic coloring agent diagnostic Drugs 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
Definitions
- My invention refers to a process for the manufacture of enameled Writing and the like tablets. I a
- a first coating of any usual composition is stoved on the iron sheet and thereupon, a finishing enamel which differs from the well known masses in so far as a very large (double or three fold) proportion of clay is added in the mill.
- This gives a matt or dull enamel surface which is easily marked by sate, lead pencil, chalk or the like, does not require any subsequent treatment, adheres firmly to the sheet iron foundation and is very resistant, being consequently very durable and utilizable for a long period.
- cryolite and enamel spar are mixed in the mill with 20 kilogs. of white clay and 12 to 15 kilogs. of black pigment. y
- nium fluoride the addition of clay being somewhat reduced for-say-5 to 10 per cent with regard to the example given above.
- WVhat 'I claim is:
- a process of manufacturing enamelcoated writing tablets which comprises stoving a first enamel coating of any known composition on a sheet iron foundation and thereupon stoving thereon a finishing coat of matt or dull enamel.
- A. process of. manufacturing enamelcoated writlngtablets which comprises stovinga first enamel coating of any knowna composition on a sheet iron foundation and thereupon stoving thereon a finishing coat of -matt or dull enamel, said finishing coat being prepared by grinding a ,fused'enameh a considerably larger addition of clay than ordinarily employed.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Drawing Aids And Blackboards (AREA)
- Paints Or Removers (AREA)
- Medicinal Preparation (AREA)
Description
Patented Dec. 5, 1922.
lT Y
RICHARD ZULAUF, or rnAnKron'r-on-rnE-Mun, GERMANY.
MANUFACTURE OF ENAMELED WRITING TABLETS. v
I public, residing at Frankfort-on-the-Main,
Germany, Stifterstrasse 28, have invented certain new and useful Improvements in the Manufacture of Enameled Writing Tablets, of which the following is a specification.
My invention refers to a process for the manufacture of enameled Writing and the like tablets. I a
As a substitute for the slate tablets which, as is known, have the serious drawback of being very liable to break, writing tablets have been proposed which were made of sheet iron covered with a coating of enamel. In order to render it suitable for writing with slate, lead pencil or chalk and the like, the finished enamel coating was roughened by means of etching agents (such for 111- stance as hydrochloric acid) or by applying certain chemicals to the enamel and stoving again.
It will be evident that enamel coatings subjected to such quently be rendered less resistant to external influences, and will tend to crack or scale and the like. These drawbacks appeared especially in writing tablets which had been made by applying a single enamel coating or by even two coats of the same enamel mass.
However, as I have found, enameled writing tablets of very high durability can be obtained, without any subsequent treatment of the stoved enamel coating by working in the following manner:
A first coating of any usual composition is stoved on the iron sheet and thereupon, a finishing enamel which differs from the well known masses in so far as a very large (double or three fold) proportion of clay is added in the mill. This gives a matt or dull enamel surface which is easily marked by sate, lead pencil, chalk or the like, does not require any subsequent treatment, adheres firmly to the sheet iron foundation and is very resistant, being consequently very durable and utilizable for a long period.
In accordance with the colour desired, the well known colouring agents are added, the so-called black pigments being mostly emtreatment will conse 1921. Serial No. 472,864.
ployed in order to obtain a product resembling slate.
As an example, 100 kilogs. of a covering or finishing mass (consisting of feldspar,
cryolite and enamel spar are mixed in the mill with 20 kilogs. of white clay and 12 to 15 kilogs. of black pigment. y
' Moreover, I have found that for the purpose of obtaining surfaces quite equal to those of slate writing tablets, it is advisable to add to the finishing enamel mass, when being ground,
nium fluoride, the addition of clay being somewhat reduced for-say-5 to 10 per cent with regard to the example given above.
WVhat 'I claim is:
'1. A process of manufacturing enamelcoated writing tablets which comprises stoving a first enamel coating of any known composition on a sheet iron foundation and thereupon stoving thereon a finishing coat of matt or dull enamel.
2. In the process as set forth in claim 1, grinding the finishing enamel mass with a a smallpercentage of zircodisproportionately large addition] of clay,
and thereupon stoving it on the first coat. I
3. A. process of. manufacturing enamelcoated writlngtablets which comprises stovinga first enamel coating of any knowna composition on a sheet iron foundation and thereupon stoving thereon a finishing coat of -matt or dull enamel, said finishing coat being prepared by grinding a ,fused'enameh a considerably larger addition of clay than ordinarily employed.
t. A. process of menu acturing enamelcoated writing tablets which comprises stoving a-first enamel coating of any known composition on asheet iron foundation and In testimony whereof I afiix my signature in presence of two witnesses.
RICHARD ZULAUF.
Witnesses ADoLr BRAUBURGER,
FRANZ S'rIoKnL.
ling mixture of ordinary composition with
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEZ11897D DE362485C (en) | 1920-11-14 | 1920-11-14 | Process for the production of writing boards |
| FR532977D FR532977A (en) | 1920-11-14 | 1921-01-05 | Process for the production of writing boards covered with enamel |
| NL17899A NL7706C (en) | 1920-11-14 | 1921-01-29 | |
| GB6162/21A GB171663A (en) | 1920-11-14 | 1921-02-23 | Process for the manufacture of enamelled writing tablets |
| US472864A US1438154A (en) | 1920-11-14 | 1921-05-26 | Manufacture of enameled writing tablets |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEZ11897D DE362485C (en) | 1920-11-14 | 1920-11-14 | Process for the production of writing boards |
| US472864A US1438154A (en) | 1920-11-14 | 1921-05-26 | Manufacture of enameled writing tablets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1438154A true US1438154A (en) | 1922-12-05 |
Family
ID=40428057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US472864A Expired - Lifetime US1438154A (en) | 1920-11-14 | 1921-05-26 | Manufacture of enameled writing tablets |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1438154A (en) |
| DE (1) | DE362485C (en) |
| FR (1) | FR532977A (en) |
| GB (1) | GB171663A (en) |
| NL (1) | NL7706C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466682A (en) * | 1944-05-27 | 1949-04-12 | Ferro Enamel Corp | Porcelain enamel finish |
| US2781636A (en) * | 1952-06-23 | 1957-02-19 | Fulmer Res Inst Ltd | Low emissivity coatings for metal surfaces |
-
1920
- 1920-11-14 DE DEZ11897D patent/DE362485C/en not_active Expired
-
1921
- 1921-01-05 FR FR532977D patent/FR532977A/en not_active Expired
- 1921-01-29 NL NL17899A patent/NL7706C/xx active
- 1921-02-23 GB GB6162/21A patent/GB171663A/en not_active Expired
- 1921-05-26 US US472864A patent/US1438154A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466682A (en) * | 1944-05-27 | 1949-04-12 | Ferro Enamel Corp | Porcelain enamel finish |
| US2781636A (en) * | 1952-06-23 | 1957-02-19 | Fulmer Res Inst Ltd | Low emissivity coatings for metal surfaces |
Also Published As
| Publication number | Publication date |
|---|---|
| FR532977A (en) | 1922-02-16 |
| DE362485C (en) | 1922-10-28 |
| GB171663A (en) | 1922-05-18 |
| NL7706C (en) | 1922-11-15 |
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