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DE889111C - Process for the production of luminous screens - Google Patents

Process for the production of luminous screens

Info

Publication number
DE889111C
DE889111C DEL4712D DEL0004712D DE889111C DE 889111 C DE889111 C DE 889111C DE L4712 D DEL4712 D DE L4712D DE L0004712 D DEL0004712 D DE L0004712D DE 889111 C DE889111 C DE 889111C
Authority
DE
Germany
Prior art keywords
luminous
binder
solution
potassium silicate
ethyl alcohol
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
DEL4712D
Other languages
German (de)
Inventor
Wolfram Dipl-Ing Uhlmann
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.)
Alcatel Lucent Deutschland AG
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Priority to DEL4712D priority Critical patent/DE889111C/en
Application granted granted Critical
Publication of DE889111C publication Critical patent/DE889111C/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/02—Automatic catches, i.e. released by pull or pressure on the wing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Description

Verfahren zur Herstellung von Leuchtschirmen Beim Sedimentieren von Leuchtstoffen, z. B. für Leuchtschirme in Kathodenstrahlröhren, verwendet man meistens, um ein gutes Haften der Schirme an der Glasfläche zu erreichen, irgendwelche Bindemittel, die man der Suspensionsflüssigkeit beimischt. Am häufigsten wird wohl Kalium- oder Natriumsilicat benutzt. Wenn man z. B. als Suspensionsflüssigkeit Wasser verwendet und diesem z. B. Kaliumsilicat zusetzt, so muß man, wenn man ein gutes Haften der Leuchtfarbe erreichen will, ,verhältnismäßig konzentrierte Lösungen verwenden.Method of making luminous screens When sedimenting Phosphors, e.g. B. for fluorescent screens in cathode ray tubes, are mostly used in order to achieve good adhesion of the screens to the glass surface, any binding agents, which you add to the suspension liquid. The most common is probably potassium or Sodium silicate used. If you z. B. used as the suspension liquid water and this z. B. Adds potassium silicate, so you have to, if you have a good adhesion of the If you want to achieve fluorescent paint, use relatively concentrated solutions.

Dies erklärt sich daraus, daß nach Ab-setzen des Leuchtstoffes die überstehende Suspensionsflüssigkeit, d. h. also deren Hauptmenge, wieder entfernt wird und demzufolge nur kleine Mengen des Bindemittels im Schirm verbleiben. Außerdem geschieht es bei diesem Verfahren leicht, daß der abgesetzte Schirm beim Entfernen der überschüssigen Flüssigkeit z. B. durch Absaugen fortrutscht.This is explained by the fact that after the phosphor has been deposited supernatant suspension liquid, d. H. so the main part, removed again and consequently only small amounts of the binding agent remain in the screen. aside from that It is easy with this method that the detached screen is removed when it is removed the excess liquid z. B. slips by suction.

Diese Schwierigkeit vermeidet das erfindungsgemäße Verfahren dadurch, daß man eine gesättigte Lösung von z. B. Kalium-Natrium-Silicat oder eines Gemisches beider in einer Mischung von Äthylalkohol mit Wasser herstellt, eine der jeweiligen Schirmfarbe angepaßte Menge dieser Mischung mit einem größeren Volumen Äthylalkohol vermischt, so daß infolge der erhöhten Alkoholkonzentration eine Übersättigung an Bindemittel eintritt und dieses gleichzeitig mit der sich absetzenden Leuchtfarbe ausfällt. ' Der Grund, warum die nach dieser Art hergestellten Schirme beim Entfernen der überschüssigen Flüssigkeitsmenge nicht so leicht fortrutschen, liegt darin, daß sich jetzt praktisch die gesamte, ursprünglich in der Suspensionsflüssigkeit befindliche Bindemittefmenge im Leuchtschirm befindet und die überstehende Flüssigkeit fast nur aus reinem Alkohol und Wasser besteht.The method according to the invention avoids this difficulty by that a saturated solution of z. B. potassium-sodium-silicate or a mixture both in a mixture of ethyl alcohol with water, one of the respective Screen color adapted amount of this mixture with a larger volume of ethyl alcohol mixed, so that as a result of the increased alcohol concentration, a supersaturation Binder occurs and this at the same time as the luminescent paint that is deposited fails. ' The reason why the umbrellas made in this way do not slide so easily when removing the excess amount of liquid, lies in the fact that now practically all of it, originally in the suspension liquid The amount of binder in the screen and the supernatant liquid consists almost entirely of pure alcohol and water.

Claims (5)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von Leuchtschirmen, z. B. für Kathodenstrahlröhren, insbesondere durch Sedimentation, dadurch gekennzeichnet, daß als Suspensionsflüssigkeit für die Leuchtfarbe eine übersättigte Lösung eines geeigneten, Bindemittels gewählt wird, ;aus der gleichzeitig mit der sich .absetzenden Leuchtfarbe das Bindemittel z. B. in kolloidaler Form ausfällt und die sich absetzenden Leuchtfarbenteilchen anein:anderki:ttet. PATENT CLAIMS: i. Process for the production of luminous screens, z. B. for cathode ray tubes, in particular by sedimentation, characterized in that that as a suspension liquid for the luminous color, a supersaturated solution of a suitable, binding agent is selected; from the simultaneous with the .settenden Luminous paint the binder z. B. precipitates in colloidal form and the settling Luminous color particles anein: anderki: ttet. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß als Suspensionsflüssigkeit, die gleichzeitig das Bindemittel enthält, eine übersättigte Lösung von Kaliumsilicat in einem Äthylalkohol-Wasser-Gemisch gewählt wird. 2. The method according to claim i, characterized in that that the suspension liquid, which also contains the binder, is a supersaturated one Solution of potassium silicate in an ethyl alcohol-water mixture is chosen. 3. Verfahren nach Anspruch i und 2, dadurch gekennzeichnet, daß eine übersättigte Kaliumsilicatlösung verwendet wird, die aus einer gesättigten Lösung von Kaliumsilicat in einem Äthylalkohol-Wasser-Gemisch und einer größeren Menge z. B. 93o/oigem Äthylalkohol besteht. q.. 3. Procedure according to claim 1 and 2, characterized in that a supersaturated potassium silicate solution is used, which is made from a saturated solution of potassium silicate in an ethyl alcohol-water mixture and a larger amount e.g. B. 93o / oigem ethyl alcohol. q .. Verfahren nach Anspruch i, 2 und 3, dadurch gekennzeichnet, daß als Bindemittel Natriumsilicat oder ein Gemisch von Natriumsilicat und Kaliumsilicat verwendet wird. Procedure according to Claims 1, 2 and 3, characterized in that sodium silicate is used as the binder or a mixture of sodium silicate and potassium silicate is used. 5. Verfahren.nach Anspruch r, dadurch gekennzeichnet, daß als Bindemittel eine gegenüber dem Schirmmaterial chemisch indifferente Substanz, z. B. kolloidale Kieselsäure, verwendet wird.5. Procedure.according to Claim r, characterized in that a binding agent opposite the screen material chemically indifferent substance, e.g. B. colloidal silica is used.
DEL4712D 1944-12-21 1944-12-21 Process for the production of luminous screens Expired DE889111C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL4712D DE889111C (en) 1944-12-21 1944-12-21 Process for the production of luminous screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL4712D DE889111C (en) 1944-12-21 1944-12-21 Process for the production of luminous screens

Publications (1)

Publication Number Publication Date
DE889111C true DE889111C (en) 1953-10-29

Family

ID=7256604

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL4712D Expired DE889111C (en) 1944-12-21 1944-12-21 Process for the production of luminous screens

Country Status (1)

Country Link
DE (1) DE889111C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036400B (en) * 1956-01-13 1958-08-14 Chromatic Television Lab Inc Method for covering the window of a cathode ray tube with a luminous layer
DE3801771A1 (en) * 1988-01-22 1989-07-27 Philips Patentverwaltung Method for producing a fluorescent screen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036400B (en) * 1956-01-13 1958-08-14 Chromatic Television Lab Inc Method for covering the window of a cathode ray tube with a luminous layer
DE3801771A1 (en) * 1988-01-22 1989-07-27 Philips Patentverwaltung Method for producing a fluorescent screen

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