Method of producing glass vials

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United States of America Patent

PATENT NO 10442718
APP PUB NO 20160130170A1
SERIAL NO

15000072

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for producing glass vials, in particular pharmaceutical vials or pharmaceutical ampoules, from a glass tube is provided, the method including the following steps: (a) rotating the glass tube about a longitudinal axis thereof; (b) locally heating the glass tube from one side by means of at least one burner to at least the softening temperature of the glass; (c) reducing the diameter by pressing at least one forming body laterally against the heated region; and (d) separating the glass tube by means of a burner. A glass vial produced in such a way releases a reduced amount of alkali in accordance with ISO 4802 and has a decreased delamination tendency. Furthermore, in the hot-formed peripheral region, the alkali content is only slightly reduced when compared with the alkali content in the glass interior.

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Patent Owner(s)

  • SCHOTT AG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jaeger, Franz Tirschenreuth, DE 5 32
Maennl, Reinhard Mitterteich, DE 6 55
Tratzky, Stephan Neustadt an der Waldnaab, DE 16 150

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