DE599960C - Process for making divisions - Google Patents

Process for making divisions

Info

Publication number
DE599960C
DE599960C DEH138077D DEH0138077D DE599960C DE 599960 C DE599960 C DE 599960C DE H138077 D DEH138077 D DE H138077D DE H0138077 D DEH0138077 D DE H0138077D DE 599960 C DE599960 C DE 599960C
Authority
DE
Germany
Prior art keywords
horn
divisions
wood
cell
cellular
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
Application number
DEH138077D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DEH138077D priority Critical patent/DE599960C/en
Application granted granted Critical
Publication of DE599960C publication Critical patent/DE599960C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/002—Details
    • G01B3/004—Scales; Graduations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Description

Verfahren zur Herstellung von Teilungen Das neue Verfahren dient zur Herstellung von Feineinteilungen für mathematische Geräte, wie Rechenstäbe, Maßstäbe u. dgl. aus Holz mit Zellhornbelag (Celluloidb:elag).Process for the production of divisions The new process is used to Production of fine divisions for mathematical devices, such as slide rules, rules and the like made of wood with a cellular horn coating (Celluloidb: elag).

Zur Ausführung des Verfahrens werden die Holzteile mit an sich bekannten Zellhornbindemitteln versehen und gemeinsam ein-oder zweiseitig mit Zellhornschichten einer Heißpressung unterworfen, wobei eine Heizplatte mit dem Negativmuster der Feineinteilungen versehen ist, das im Zellhorn abgebildet wird. Bei dem Heißpreßvorgang wird folgendes erreicht: Das Holz wird verdichtet, je nach der Holzart um etwa 5o bis über too %, und es wird durch diese Verdichtung härter und widerstandsfähiger, die im Holz enthaltene Feuchtigkeit entweicht in Dampfform, die Zellhornbindemittel schmelzen, füllen die Poren des Holzes aus und verkitten die Holzfasern, wobei außer der Härtung durch den Druck beim Zusammenpressen noch die Härtung durch diese Tränkung hinzukommt. Die Zellhornschichten verbinden sich innig mit dem Holz, in dem erweichten Zustande füllt das Zellhorn die Form genau aus und bildet einen genauen scharfen Abdruck der Feineinteilung. Verfahren zum Uberziehen von Holzteilen mit Zellhorn, bei denen dieses unmittelbar auf den Grundkörper aufgepreßt wird, sind bekannt.To carry out the process, the wooden parts are known per se Provided cellular horn binders and jointly on one or both sides with cellular horn layers subjected to a hot pressing, wherein a heating plate with the negative pattern of Fine divisions is provided, which is mapped in the cell horn. In the hot pressing process the following is achieved: The wood is compressed, depending on the type of wood by about 5o up to over too%, and this compression makes it harder and more resistant, the moisture contained in the wood escapes in vapor form, the cell horn binders melt, fill the pores of the wood and cement the wood fibers, except the hardening due to the pressure when pressed together nor the hardening due to this impregnation come in addition. The cellular horn layers bond intimately with the wood in which softened The cellular horn fills the shape exactly and forms an exact sharp one Imprint of the fine division. Process for covering wooden parts with cell horn, in which this is pressed directly onto the base body are known.

Bei dem neuen Verfahren werden die Teilungen genau. Dies wird erreicht durch die innige Verbindung des Zellhorns mit der Holzunterlage. Beim. Holz treten bei den erforderlichen Preßtemperaturen praktisch keine Längenänderungen ein, durch die innige Verbindung des Zellhorns mit dem Holz können sich Schrumpfungen beim Warmpressen nicht auswirken. Günstig ist die Warmbehandlung des Zellhoms auch für die Teilungen, durch die Erhitzung bis zur Erweichung wird das Zellhorn gehärtet, es tritt sozusagen ein Alterungsprozeß, ein, der Schrumpferscheinungen, dis sich bei frischem Zellhorn noch nach Jahren zeigen, entgegenwirkt.With the new method, the divisions are accurate. This is achieved through the intimate connection of the cell horn with the wooden base. At the. Kicking wood practically no changes in length at the required pressing temperatures the intimate connection of the cell horn with the wood can cause shrinkage Hot pressing does not have any effect. The heat treatment of the cellular homome is also beneficial for the divisions, by heating to softening the cell horn is hardened, a process of aging occurs, so to speak, of shrinkage phenomena show even after years with fresh cell horn, counteracts this.

Bei Einteilungen aus schwachem Werkstoff tritt bei einseitigem Zellhornbelag durch Werkstoffspannungen ein Krümmen ein; dieses kann vermieden werden, wenn auf beide Seiten der Holzschicht Zellhorn aufgebracht wird, die Spannungen heben sich dann auf.In the case of subdivisions made of weak material, a cellular horn coating occurs on one side bending due to material stresses; this can be avoided when on Both sides of the cellular horn wood layer are applied, the tensions are lifted then on.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Teilungen auf Holz mit Zellhornbelag, dadurch gekennzeichnet, daß die mit Zellhornbindemitteln versehenen Holzteile gemeinsam mit den Zellhornschichten unter Anwendung von Heizplatten mit dem Negativmuster der Einteilungen heißgepreßt werden.PATENT CLAIM: Process for the production of divisions on wood with Cell horn covering, characterized in that those provided with cell horn binders Wooden parts together with the cell horn layers using heating plates hot-pressed to the negative pattern of the divisions.
DEH138077D 1933-11-12 1933-11-12 Process for making divisions Expired DE599960C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH138077D DE599960C (en) 1933-11-12 1933-11-12 Process for making divisions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH138077D DE599960C (en) 1933-11-12 1933-11-12 Process for making divisions

Publications (1)

Publication Number Publication Date
DE599960C true DE599960C (en) 1934-07-12

Family

ID=7177914

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH138077D Expired DE599960C (en) 1933-11-12 1933-11-12 Process for making divisions

Country Status (1)

Country Link
DE (1) DE599960C (en)

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