US4457254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film coating and biaxial orienting apparatus
Assignee: Mobil Oil AS
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Filing: 1982-09-30
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Granted: 1984-07-03
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Expires: 2002-09-30
Abstract
Abstract Film coating and biaxial orienting apparatus comprising a first uniaxial stretching unit for machine direction orientation of the film, a coating device to provide a liquid coating composition in a center band on the film, a second uniaxial stretching unit for transversely orienting the coated film and having edge holders for gripping the film, and a heater for curing the coating under constrained conditions during setting of the film.
Inventors
- 👤 Gordon P. Hungerford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:47
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/023; B29C55/026; B05; B05D; B05D3/00; B05D3/02; B05D3/0209; B05D7/00; B05D7/02; B05D7/04; B05D2506/00; B05D2506/20; B05D2506/25; B05D3/0254; B05D3/0263; B05D3/04; B05D3/0406; B05D3/0413; B05D3/0486; B05D3/12; B29C37/00; B29C2037/90; B29C35/00; B29C35/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
A continuous film coating and biaxial orienting system adapted for manufacturing polymer film comprising means for feeding a continuous film comprising orientable thermoplastic polymer to a first uniaxial stretching unit; said first uniaxial stretching unit having differential speed roll means for machine direction orientation of the film; coating means operatively connected to receive film from the first stretching means, said coating means being adapted to provide a liquid coating composition continuously to the film surface in a centerband; second uniaxial stretching means for transversely orienting the coated film and having edge handling means for holding the film during stretching; and heater means for curing the coating composition including means for holding the biaxially oriented and coated film under constrained conditions during setting of the film.
Claim 2
Dependent Claim
125 words
A continuous film coating and biaxial orienting system adapted for manufacturing polymer film comprising means for feeding a continuous film comprising orientable thermoplastic polymer to a first uniaxial stretching unit; said first uniaxial stretching unit having differential speed roll means for machine direction orientation of the film; coating means operatively connected to receive film from the first stretching means, said coating means being adapted to provide a liquid coating composition continuously to the film surface in a centerband; second uniaxial stretching means for transversely orienting the coated film and having edge handling means for holding the film during stretching; and heater means for curing the coating composition including means for holding the biaxially oriented and coated film under constrained conditions during setting of the film.
Claim 3
Dependent Claim
72 words
The system of claim 1 wherein said coating means comprises a trough film coater having an open side dimensioned to apply a center band of liquid to a film held taut against the open side, handling means for holding film taut against the open-sided trough while moving the film upwardly, and means for metering the liquid coating composition to maintain a predetermined level of coating composition in contact with the moving film.
Claim 4
Dependent Claim
117 words
A coating system comprising means including an open-sided trough for continuously coating orientable flat film, said trough coating means being adapted to apply a center band of liquid coating composition to the film, thereby leaving uncoated edges; handling means for moving the film upwardly against the open side of the trough; tensioning means for holding the film taut against the open-sided trough thereby forming a liquid reservoir; means for metering liquid coating composition into the trough reservoir at a rate corresponding to the take up rate of reservoir liquid onto the film; and means for orienting said coated film, said means for orienting comprising tentering clips and means for attaching said tentering clips to said uncoated edges.
Claim 5
Dependent Claim
117 words
A coating system comprising means including an open-sided trough for continuously coating orientable flat film, said trough coating means being adapted to apply a center band of liquid coating composition to the film, thereby leaving uncoated edges; handling means for moving the film upwardly against the open side of the trough; tensioning means for holding the film taut against the open-sided trough thereby forming a liquid reservoir; means for metering liquid coating composition into the trough reservoir at a rate corresponding to the take up rate of reservoir liquid onto the film; and means for orienting said coated film, said means for orienting comprising tentering clips and means for attaching said tentering clips to said uncoated edges.
Claim 6
Dependent Claim
28 words
The system of claim 3 wherein said coating system is operatively connected to receive a continuous film strip and to feed coated film to said means for orienting.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |