US4200963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for simultaneous biaxially stretching
Assignee: Brückner Maschinenbau GmbH
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Filing: 1978-11-02
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Granted: 1980-05-06
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Expires: 1998-11-02
Abstract
Abstract A biaxial web stretching machine has diverging tong conveying screws and the screws are provided with double or triple threads to provide relatively high speed tong movement with a relatively low speed of screw rotation.
Inventors
- 👤 Eberhard Kamfe
- 👤 Willi Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:14
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/16; B29C55/165
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
Simultaneous biaxally stretching machine for thermoplastic films, having tongs guide ways arranged on both sides of a running-in zone, a stretching zone, a fixing zone, and conveying means for the tongs, there being provided, at least, in individual straight sections of the tongs guide ways, spindles having screw guide ways, partly with changing lead, for the tongs, characterized in that the spindles (4) are provided as multiple-threaded spindles.
Claim 2
Dependent Claim
68 words
Simultaneous biaxally stretching machine for thermoplastic films, having tongs guide ways arranged on both sides of a running-in zone, a stretching zone, a fixing zone, and conveying means for the tongs, there being provided, at least, in individual straight sections of the tongs guide ways, spindles having screw guide ways, partly with changing lead, for the tongs, characterized in that the spindles (4) are provided as multiple-threaded spindles.
Claim 3
Dependent Claim
19 words
Simultaneous biaxially stretching machine according to claim 1, characterized in that the spindles (4) are provided with double threads.
Claim 4
Dependent Claim
19 words
Simultaneous biaxially stretching machine according to claim 1, characterized in that the spindles (4) are provided with triple threads.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |