| 摘要 |
739,331. Moulding glass. CORNING GLASS WORKS. Jan. 6, 1954 [Jan. 12, 1953], No. 389/54. Class 56. In a glass-moulding apparatus generally as in Specification 674,565 wherein a charge of molten glass is centrifuged into a funnel-tube form, the glass at and immediately adjacent the junction of the funnel and tube is marvered immediately after centrifuging but while it is still workable. This may be effected by adaptation of the portion 24 of the cam surfaces 23, 24, 25 that control the movements of the distributer 17 so that the latter descends axially through the tubular portion of the mould 12 but, on being raised, is moved laterally as it reaches the junction of the tube and funnel portions of the mould as shown. On the up stroke the surfaces 24 are at an angle as shown; on the down stroke they are in vertical alignment. The speed of the distributer on the up stroke is automatically reduced during the time that it is marvering. Slight modifications are described; in one of these a spring-biased frame with which the roller 22 on the arm 16 coacts is used instead of the retractable surfaces 24. |
