GB831980A - Method and apparatus of producing projections on glass surfaces - Google Patents

Method and apparatus of producing projections on glass surfaces

Info

Publication number
GB831980A
GB831980A GB27556/56A GB2755656A GB831980A GB 831980 A GB831980 A GB 831980A GB 27556/56 A GB27556/56 A GB 27556/56A GB 2755656 A GB2755656 A GB 2755656A GB 831980 A GB831980 A GB 831980A
Authority
GB
United Kingdom
Prior art keywords
glass
vacuum
tools
wall
face plate
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
GB27556/56A
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.)
OI Glass Inc
Original Assignee
Owens Illinois Glass Co
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 Owens Illinois Glass Co filed Critical Owens Illinois Glass Co
Publication of GB831980A publication Critical patent/GB831980A/en
Expired legal-status Critical Current

Links

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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/0013—Re-forming shaped glass by pressing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/0073—Re-forming shaped glass by blowing
    • C03B23/008—Vacuum-blowing
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

831,980. Glass manufacture. OWENSILLINOIS GLASS CO. Sept. 10, 1956 [Sept. 20, 1955], No. 27556/56. Class 56. Projections are formed on a glass surface, particularly on the interior wall of a face plate for a cathode ray tube, by softening a localized area of the wall, establishing pressure contact between a portion of the softened area and a forming tool, and shaping the softened area. The depth of the softened glass is less than the thickness of the glass so that the exterior face of the wall is not distorted. The tool may be associated with vacuum means for drawing the surface of the glass into the recess. In Fig. 1, the cathode-ray tube face plate 15 rests upon locating buttons 18 and is positioned by two pairs of opposed fixed and movable rollers 24a, 24b, the rollers 24b being vertically movable by fluid-pressure means 25. The forming tools 19 are each moved towards the glass wall, by fluid-pressure means 16, through an annular burner 23 which is supplied with fuel at 23b and plays upon the glass wall to soften a limited area and depth thereof. Vacuum may be applied to the tools 19 through passages 19b, 17b a plug 19d, with very small axial grooves, permitting the vacuum to be applied to the tools but preventing glass from being drawn into the passage 19b. A motor-driven shaft 28 carries cams 30a, 30b, 30c, 30d which control vacuum supply valves 26a, 26b and fluidpressure supply valves 27a, 27b. The valves are operated in sequence so that the rollers 24b are forced up to grip the face plate in virtue of the slight taper of the flange 15a, and after a period sufficient for the burners 23 to soften the glass, the tools 19 are moved into contact with the glass and vacuum is applied to the cavities in the tools. Application of vacuum to the cylinders 16 and 25 permits the face plate to be removed. The shapes of the projections may be varied by altering the shapes of the recesses in the forming tools and the face plate may be thickened on the flange at the positions to be provided with projections so that any substantial reduction in wall thickness is avoided.
GB27556/56A 1955-09-20 1956-09-10 Method and apparatus of producing projections on glass surfaces Expired GB831980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US831980XA 1955-09-20 1955-09-20

Publications (1)

Publication Number Publication Date
GB831980A true GB831980A (en) 1960-04-06

Family

ID=22176798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27556/56A Expired GB831980A (en) 1955-09-20 1956-09-10 Method and apparatus of producing projections on glass surfaces

Country Status (4)

Country Link
DE (1) DE1075805B (en)
FR (1) FR1159264A (en)
GB (1) GB831980A (en)
NL (2) NL210149A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016207233A1 (en) 2016-04-28 2017-11-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. A method for locally forming a smooth surface of a substrate made of glass or a glass ceramic as well as a control element produced by the method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE639444C (en) * 1934-08-11 1936-12-05 Jakob Dichter Process for reshaping the ends of fitted glass tubes
DE879758C (en) * 1951-12-20 1953-06-15 Becton Dickinson Co Injection syringe and method and device for their manufacture

Also Published As

Publication number Publication date
DE1075805B (en) 1960-02-18
NL104999C (en)
NL210149A (en)
FR1159264A (en) 1958-06-25

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