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AT387735B - Method for manufacturing fluorescent tube pins with a narrowed head end, which are designed with a circumferential bead, and automatic machine with a carousel plate for manufacturing fluorescent tube pins using the method - Google Patents

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Fluorescent tube pins with narrowed head ends are manufactured using an automatic machine by a rolled tube being prepared from a metal band as basic material and cut into tubular pieces 2b, each of which is supplied to a carousel insert 12, with which different striker head inserts 13 successively interact. In this connection, the upper end of the tubular piece 2b is increasingly narrowed, while the lower end of the tubular piece 2b, supported on a feed mandrel 11, is upset in the carousel insert 12. Subsequently, a circumferential bead is formed on the tubular piece 2b in an area lying between the carousel insert 12 and the striker head insert 13e by exerting an axial force. <IMAGE>

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387735

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B

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Patent specification

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