Patent CH548850A successfully refreshed from Google Patents.
CH548850A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
DEVICE FOR MANUFACTURING EXTRUDED BLOWN PLASTIC TUBE FILMS WITH A BLOW HEAD AND A FLAT-LAYING AND PULL-OFF DEVICE.
Assignee: Burgdorf Stanniolfabrik Ag
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Filing: 1973-02-07
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Granted: —
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Expires: 1993-02-07
Abstract
Abstract Appts. for producing extruded, blown, tubular plastics films includes a blowing head, a withdrawing means and a flattening means comprising cooling boxes which are maintained under a partial vacuum, immersed in a cooling medium and have perforated surfaces adjacent the film.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-08 21:51
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/885; B29C48/03; B29C48/09; B29C48/10; B29C48/911; B29C48/9115; B29C48/912; B29C48/001; B29C48/0018; B29C48/0019
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