GB547880A - Improvements in or relating to the manufacture of glass tubes - Google Patents

Improvements in or relating to the manufacture of glass tubes

Info

Publication number
GB547880A
GB547880A GB171341A GB171341A GB547880A GB 547880 A GB547880 A GB 547880A GB 171341 A GB171341 A GB 171341A GB 171341 A GB171341 A GB 171341A GB 547880 A GB547880 A GB 547880A
Authority
GB
United Kingdom
Prior art keywords
tube
former
glass
chuck
rotated
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
GB171341A
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 GB171341A priority Critical patent/GB547880A/en
Publication of GB547880A publication Critical patent/GB547880A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/04—Forming tubes or rods by drawing from stationary or rotating tools or from forming nozzles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

547,880. Making glass tubes. EVERETT, S. J. Feb. 8, 1941, Nos. 1713 and 13292. [Class 56] A method of forming a glass tube with accurately shaped internal or external surfaces consists in drawing an initially cold tube over or through a former while heating the tube only in the vicinity of the former. The glass tube 1, Fig. 1, may be held between chucks 2, 3, which are movable independently along guides 4, 5, respectively, to carry the tube through a furnace 6. A former 7 is supported within the tube by a rod 8 which is slidable through the chuck 2 and is rotated by a motor 19. A suction pump 18 driven by the motor is connected to the interior of the tube 1. In operation, the tube is heated by the furnace until the glass is plastic and is caused by the exhaustion of the air from its interior to contract and conform to the former 7. Heating is started at the end of the tube near the chuck 3, and the chucks are moved along their guides by a motor 29, so that the heating and contracting proceed continuously along the length of the tube. The chuck 3 is moved at a slightly greater speed than the chuck 2 to allow for the extension of the tube as it passes through the furnace. The former 7 may be made of silica or stainless steel, and the bore of the tube may be coated with colloidal graphite to serve as a lubricant. The rotation of the former ensures that the inner surface of the finished tube shall be accurately cylindrical and smooth and to be suitable, therefore, for making hypodermic syringes. If tubing of accurate external diameter is required, the former surrounds the tube and the heated glass is expanded by compressed gas. The former is not rotated when a finished tube of non-circular cross section is required. The method may be used for shaping tubing as it is formed by the process in which a ribbon of molten glass 51, Fig. 4, flows on to a rotating inclined mandrel 53 and is drawn off from the lower end of the mandrel by suitable drawing- apparatus 54. The former 55 is inserted in the tube 50 through an axial bore 58 in the mandrel. and is rotated by a flexible driving element 57.
GB171341A 1941-02-08 1941-02-08 Improvements in or relating to the manufacture of glass tubes Expired GB547880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB171341A GB547880A (en) 1941-02-08 1941-02-08 Improvements in or relating to the manufacture of glass tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB171341A GB547880A (en) 1941-02-08 1941-02-08 Improvements in or relating to the manufacture of glass tubes

Publications (1)

Publication Number Publication Date
GB547880A true GB547880A (en) 1942-09-16

Family

ID=9726717

Family Applications (1)

Application Number Title Priority Date Filing Date
GB171341A Expired GB547880A (en) 1941-02-08 1941-02-08 Improvements in or relating to the manufacture of glass tubes

Country Status (1)

Country Link
GB (1) GB547880A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532091A (en) * 1947-02-18 1950-11-28 Everett Samuel James Thermoplastic tube forming apparatus
US2545729A (en) * 1946-02-27 1951-03-20 Everett Samuel James Apparatus for the manufacture of thermoplastic tubes
US2613479A (en) * 1947-04-21 1952-10-14 Corning Glass Works Glass reheating and reshaping

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545729A (en) * 1946-02-27 1951-03-20 Everett Samuel James Apparatus for the manufacture of thermoplastic tubes
US2532091A (en) * 1947-02-18 1950-11-28 Everett Samuel James Thermoplastic tube forming apparatus
US2613479A (en) * 1947-04-21 1952-10-14 Corning Glass Works Glass reheating and reshaping

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