GB675903A - Process of tempering curved glasses of organic polymeric materials - Google Patents

Process of tempering curved glasses of organic polymeric materials

Info

Publication number
GB675903A
GB675903A GB18190/50A GB1819050A GB675903A GB 675903 A GB675903 A GB 675903A GB 18190/50 A GB18190/50 A GB 18190/50A GB 1819050 A GB1819050 A GB 1819050A GB 675903 A GB675903 A GB 675903A
Authority
GB
United Kingdom
Prior art keywords
polymeric materials
heat
cold
organic polymeric
curved glasses
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
GB18190/50A
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.)
Lonza AG
Original Assignee
Lonza 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 Lonza AG filed Critical Lonza AG
Publication of GB675903A publication Critical patent/GB675903A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

Curved polymethacrylate articles, e.g. polymethyl methacrylate watch glasses and lenses, are tempered by inserting in a frame and heating the convex face to at least the softening-point whilst maintaining the main mass below the softening temperature. The concave surface may be simultaneously cooled with water, cold air or by application of a cold, heat-conducting object. Heat may be applied by paraffin oil, hot air or combustion gases, or by passing through a flame. Preferably the article is cooled, e.g. with cold water, immediately after the heat treatment.
GB18190/50A 1949-07-20 1950-07-20 Process of tempering curved glasses of organic polymeric materials Expired GB675903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH675903X 1949-07-20

Publications (1)

Publication Number Publication Date
GB675903A true GB675903A (en) 1952-07-16

Family

ID=4528092

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18190/50A Expired GB675903A (en) 1949-07-20 1950-07-20 Process of tempering curved glasses of organic polymeric materials

Country Status (1)

Country Link
GB (1) GB675903A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5100590A (en) * 1988-10-27 1992-03-31 Essilor International Cie Generale D'optique Method of forming an opthalmic lens from a synthetic material blank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5100590A (en) * 1988-10-27 1992-03-31 Essilor International Cie Generale D'optique Method of forming an opthalmic lens from a synthetic material blank

Similar Documents

Publication Publication Date Title
GB1021849A (en) Gas tempered glass sheets
GB583418A (en) New and improved process or producing shaped articles from polytetrafluoroethylene
ES372908A1 (en) Tripotassium phosphate treatment for strengthening glass
FR2372123A1 (en) THERMAL TREATMENT PROCESS IN A FLUIDIZED QUENCH MEDIUM
GB411075A (en) Improved method and apparatus for cooling glass articles
ES408421A1 (en) Tempering
GB1298899A (en) Process for producing tempered glass sheet
GB1057222A (en) Improved method and apparatus for heating glass
YU47144B (en) PROCEDURE AND DEVICE FOR SPHERICAL DESIGN AND TEMPERATURE OF GLASS PANES
GB721703A (en) Improvements in or relating to the manufacture of flat glass in continuous ribbon form
GB675903A (en) Process of tempering curved glasses of organic polymeric materials
GB1034344A (en) Improvements in or relating to glass-ceramics
GB1133615A (en) Improvements in or relating to methods of toughening glass in sheet form
JPS5434163A (en) Ice machine with hot water supplying device
US1809534A (en) Glass treatment
GB1208153A (en) Glass tempering processes and apparatus
GB1082237A (en) Glassware
ES375235A1 (en) Method of toughening glass in an oil bath
GB647774A (en) Improvements in and relating to the tempering of glass
GB658469A (en) Improvements in installations for the manufacture of hardened or toughened glass
GB724326A (en) Method and apparatus for the rapid annealing of glass sheets in a continuous process
US2111576A (en) Frosted glass and method of making same
GB1035906A (en) Improvements in or relating to methods and apparatus for producing toughened glass
ES249398A2 (en) Improvement in procedures for manufacturing hollow, pressed or blowed glass with resistance to thermal or mechanical shock (Machine-translation by Google Translate, not legally binding)
FR855339A (en) Improved method of heating and furnace including application, intended for the heat treatment of objects made of glass or other material