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EP0008467A1 - Procédé et appareil pour l'insertion d'un masque dans le panneau frontal d'un tube d'image en couleurs - Google Patents

Procédé et appareil pour l'insertion d'un masque dans le panneau frontal d'un tube d'image en couleurs Download PDF

Info

Publication number
EP0008467A1
EP0008467A1 EP79200342A EP79200342A EP0008467A1 EP 0008467 A1 EP0008467 A1 EP 0008467A1 EP 79200342 A EP79200342 A EP 79200342A EP 79200342 A EP79200342 A EP 79200342A EP 0008467 A1 EP0008467 A1 EP 0008467A1
Authority
EP
European Patent Office
Prior art keywords
mask
shadow mask
screen
leaf springs
trough
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.)
Withdrawn
Application number
EP79200342A
Other languages
German (de)
English (en)
Inventor
Peter Schmidt
Emil Mühlberger
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
International Standard Electric Corp
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
International Standard Electric Corp
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 Alcatel SEL AG, Standard Elektrik Lorenz AG, International Standard Electric Corp filed Critical Alcatel SEL AG
Publication of EP0008467A1 publication Critical patent/EP0008467A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/073—Mounting arrangements associated with shadow masks

Definitions

  • the invention relates to a method for inserting a shadow mask into the screen pan of a color picture tube according to the preamble of claim 1 and further relates to an apparatus for performing this method.
  • the leaf springs on the shadow mask are generally individually adapted to the connecting pins of the screen trough and their exact position is therefore individually different and the method and the device from DE-OS 27 19 268 cannot therefore be used to insert such a i Shadow mask can be used in the corresponding screen tray.
  • the object of the invention is to provide a method and an apparatus which make it possible to insert a shadow mask in a screen trough if the outer contour is neither a reference for the exact position of the leaf springs on the shadow mask nor a reference for the exact position of the connecting pins on the Screen pan there, the exact location of the leaf springs and connecting pins before the procedure is otherwise known.
  • the object is achieved by the method according to the characterizing part of claim 1 and a device according to claim 3.
  • An advantage of the device according to the invention is also that a screen tray and a shadow mask can be automatically separated again if the device is controlled accordingly.
  • a screen tray shadow mask arrangement with four connecting elements which are designed on the screen tray side as connecting pins 30 and on the shadow mask side as leaf springs 22 with a hole 23 suitable for the connecting pin 30, was selected.
  • the invention can of course also be applied analogously to arrangements with, for example, three connecting elements or differently designed connecting elements.
  • Fig. 1 shows the essential parts of an inventive device for inserting a shadow mask into the screen pan of a color picture tube.
  • the outer table - tub table 1 essentially serves to accommodate the screen trough and is arranged here in a fixed manner.
  • the inner table - mask table 2 essentially serves to hold the shadow mask and can be lowered in the vertical direction.
  • the mask table 2 could also be arranged in a fixed manner and the tub table 1 attached to it.
  • a shadow mask 21 which, as shown in FIG. 2, is given its necessary rigidity by a frame 24, is brought upwards with its curvature manually or by means of a conveyor device, not shown, approximately in the middle of the mask table 2.
  • the shadow mask 21 is guided by the guide elements 3, which are designed as blunt cones, by guiding them at the rounded corners on the Slide along the inside of the shadow mask frame 24 and thereby pre-position the shadow mask 21.
  • centering elements 4 acting on the leaf springs 22.
  • These centering elements 4 are designed as horizontal, thin bolts directed against the circumference of the shadow mask, and by sliding on a conical notch 20 formed on the leaf springs 22, the shadow mask slips into a defined position when it is placed on it. Due to the fixed geometric relationship between the notch 20 and the hole 23 of the leaf springs 22, with the support of three leaf springs, a fixed relationship between the holes 23 of the three resting leaf springs and the device is achieved.
  • the center of mass in the case of the above-described rest on three leaf springs may lie on the edge or outside the triangle formed by the contact points of the leaf springs and thereby cause the mask to tilt in the device.
  • a spring support 5 is therefore provided on the side of the shadow mask that is not supported by the centering elements 4, which is preferably dimensioned with its force acting on the shadow mask 21 from below such that the shadow mask 21 is on all three support points with approximately the same force.
  • the levers 6 protruding upward from the mask table 2 are pressed outwards against the inside of the shadow mask frame 24.
  • the pressing force is so small that the shadow mask is not pushed out of its position.
  • the contact surfaces of the lever 6 with the Shadow mask 21 are somewhat inclined to the vertical, such that they can also absorb forces acting vertically from above.
  • the pressed levers 6 are locked in this position.
  • the levers 8 are moved laterally from the outside towards the mask frame 24 and in the process press the leaf springs 22 in the direction against the shadow mask between the fastening of the leaf springs 22 and their holes 23.
  • the centering elements 4 are removed from the area of the shadow mask 21 and the screen trough 31 using, for example, pneumatic means 7.
  • the locked levers 6 carry the shadow mask 21.
  • the shadow mask 21 held in this way with the leaf springs 22 applied is lowered vertically with the mask table 2, to the extent that it is not a hindrance in the positioning of the screen pan and not in this Can come into contact.
  • the screen trough 31 matching the shadow mask 21 already lying in the device is brought onto the tub table 1, likewise with the curvature upwards, approximately in the middle above the shadow mask 21.
  • guide elements 9 are provided on the trough table 1, which are designed here as standing bolts with an upper, conically tapering part. The screen tray 31 slides along these guide elements 9 when it is placed in a sufficiently precise position in which it rests on the tray supports 10.
  • the screen pan 31 is raised again by an upward movement of the forks 11.
  • the forks 11 are arranged on the three sides of the screen trough 31, on which 21 centering elements 4 are provided for the corresponding sides of the shadow mask. These are on their top edges three forks 11 are provided with conical incisions and the three forks 11 are arranged between the tables 1 and 2 so that when they move upwards, three of the pan pins 30 of the attached screen pan 31 slide into the notches of the forks 11.
  • a spring support 12 is also provided for the screen pan 31, the dimensioning of which also applies to what has been said for the shadow mask.
  • the tub supports 10 follow the upward movement of the screen tray 31 slightly resiliently and can be locked in any position so that they carry the screen tray 31 in the position found by the upward movement of the forks 11 when the forks 11 are then lowered again.
  • pan pins 30 and the holes of the three corresponding leaf springs 22 have a fixed reference to the device, by lifting the mask table 2 again, the pan pins 30 and the leaf springs 22 can be juxtaposed so that after the tensioning lever 8 is released, the leaf springs 22 into the pan pins 30 can snap into the holes 23.
  • the screen tray / shadow mask combination thus assembled can now be removed from the device manually or by means of a conveyor device, not shown, for further processing.
  • FIG. 4 shows a somewhat modified embodiment of the device.
  • abutments 13 are provided which, when the shadow mask 21 rests, protrude between the leaf springs 22 and mask frame 24 such that the leaf springs 22 are pressed against the abutments 13 when the clamping lever 8 is moved against the mask frame 24.
  • the exemplary embodiment according to FIG. 4 has no separate spring support for the screen trough side, which is not supported by a fork 11 during positioning.
  • the two tub supports 10 adjoining this screen tub side press against the screen tub 31 with a stronger force than the opposite ones and thus prevent an unstable position or tilting of the screen tub 31 when positioning with the forks 11.

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
EP79200342A 1978-08-26 1979-06-26 Procédé et appareil pour l'insertion d'un masque dans le panneau frontal d'un tube d'image en couleurs Withdrawn EP0008467A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782837381 DE2837381A1 (de) 1978-08-26 1978-08-26 Verfahren und vorrichtung zum einsetzen einer schattenmaske in die bildschirmwanne einer farbbildroehre
DE2837381 1978-08-26

Publications (1)

Publication Number Publication Date
EP0008467A1 true EP0008467A1 (fr) 1980-03-05

Family

ID=6048017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200342A Withdrawn EP0008467A1 (fr) 1978-08-26 1979-06-26 Procédé et appareil pour l'insertion d'un masque dans le panneau frontal d'un tube d'image en couleurs

Country Status (5)

Country Link
US (1) US4322876A (fr)
EP (1) EP0008467A1 (fr)
JP (1) JPS5532395A (fr)
DE (1) DE2837381A1 (fr)
FI (1) FI792568A7 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486709A1 (fr) * 1980-07-11 1982-01-15 Rca Corp Dispositif pour introduire automatiquement un assemblage de masque dans un panneau frontal de tube cathodique
US4451243A (en) * 1980-07-11 1984-05-29 Rca Corporation Automatic mask-frame inserter
US4639230A (en) * 1980-07-25 1987-01-27 Zenith Electronics Corporation Apparatus and method for shadow mask insertion

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10044925C2 (de) * 2000-09-12 2002-12-12 Schott Glas Verfahren zur Herstellung von Bildschirmen mit Maskenbefestigungs-Pins
EP2243855B1 (fr) * 2009-04-22 2021-03-03 Solmates B.V. Dépôt laser à impulsion avec des masques perforés échangeables

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2201110A1 (de) * 1971-01-18 1972-07-27 Rca Corp Verfahren zum Einbauen einer Lochmaske mit Rahmen in das Frontplattenteil einer Kathodenstrahlroehre
US3724740A (en) * 1969-05-31 1973-04-03 Tokyo Shibaura Electric Co Assembling device
US3838483A (en) * 1973-10-26 1974-10-01 Zenith Radio Corp Method for inserting a crt mask into its mating panel
US3899812A (en) * 1973-10-26 1975-08-19 Zenith Radio Corp Automatic apparatus for inserting a CRT mask into its mating panel
US3935497A (en) * 1968-07-05 1976-01-27 Admiral Corporation Shadow mask thermal compensating assembly
DE2719268A1 (de) * 1976-07-28 1978-02-02 Hitachi Ltd Positioniervorrichtung fuer bildschirm-frontplatten
DE2829596A1 (de) * 1977-07-06 1979-01-25 Rosenlew Ab Oy W Apparatur zum zusammenstellen von bildmaske und paneel fuer bildroehre in einem fernsehgeraet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019231A (en) * 1976-07-06 1977-04-26 Zenith Radio Corporation Method for attaching a shadow or photographic mask to a flangeless, curved faceplate of a color television picture tube
JPS5918819B2 (ja) * 1976-08-11 1984-05-01 株式会社日立製作所 シヤドウマスク取り外し装置
JPS54565A (en) * 1977-06-03 1979-01-05 Hitachi Ltd Panel machining unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935497A (en) * 1968-07-05 1976-01-27 Admiral Corporation Shadow mask thermal compensating assembly
US3724740A (en) * 1969-05-31 1973-04-03 Tokyo Shibaura Electric Co Assembling device
DE2201110A1 (de) * 1971-01-18 1972-07-27 Rca Corp Verfahren zum Einbauen einer Lochmaske mit Rahmen in das Frontplattenteil einer Kathodenstrahlroehre
US3838483A (en) * 1973-10-26 1974-10-01 Zenith Radio Corp Method for inserting a crt mask into its mating panel
US3899812A (en) * 1973-10-26 1975-08-19 Zenith Radio Corp Automatic apparatus for inserting a CRT mask into its mating panel
DE2719268A1 (de) * 1976-07-28 1978-02-02 Hitachi Ltd Positioniervorrichtung fuer bildschirm-frontplatten
DE2829596A1 (de) * 1977-07-06 1979-01-25 Rosenlew Ab Oy W Apparatur zum zusammenstellen von bildmaske und paneel fuer bildroehre in einem fernsehgeraet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486709A1 (fr) * 1980-07-11 1982-01-15 Rca Corp Dispositif pour introduire automatiquement un assemblage de masque dans un panneau frontal de tube cathodique
US4451243A (en) * 1980-07-11 1984-05-29 Rca Corporation Automatic mask-frame inserter
US4639230A (en) * 1980-07-25 1987-01-27 Zenith Electronics Corporation Apparatus and method for shadow mask insertion

Also Published As

Publication number Publication date
FI792568A7 (fi) 1981-01-01
JPS5532395A (en) 1980-03-07
DE2837381A1 (de) 1980-03-06
US4322876A (en) 1982-04-06

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Inventor name: MUEHLBERGER, EMIL

Inventor name: SCHMIDT, PETER