US4768939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming shaped interlayer blanks
Assignee: Solutia Inc
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Filing: 1987-11-17
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Granted: 1988-09-06
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Expires: 2007-11-17
Abstract
Abstract Apparatus for forming discrete, shaped interlayer blanks comprises, in combination, an extrusion die containing a slot for forming a sheet from thermoplastic melt, means associated with the die for causing a portion of the melt to exit the slot at a greater mass flow rate than that of the remainder of the melt exiting the slot, means adjacent the die for quenching the sheet immediately after forming and frusto-conical pull rolls for forwardly shaping the sheet into arcuate form, the surfaces of said rolls adjacent the edges of greatest circumference positioned to contact the portion of the sheet formed from the melt exiting the slot at the greater mass flow rate.
Inventors
- 👤 David P. Bourcier
- 👤 Robert A. Esposito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:12
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10981; B26; B26F; B26F3/00; B26F3/004; B29; B29C; B29C48/00; B29C48/001; B29C48/0022; B29C48/03; B29C48/07; B29C48/08; B29C48/131; B29C48/25; B29C48/255; B29C48/2556; B29C48/30; B29C48/305; B29C48/31; B29C48/92; B32B17/10889; B29C2793/00; B29C2793/0027; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92114; B29C2948/92152; B29C2948/92323; B29C2948/92447; B29C2948/92504; B29C2948/92571; B29C2948/9258; B29C2948/926; B29C2948/92704; B29C2948/92809; B29C2948/92819; B29C2948/92857; B29C2948/92904; B29C2948/92923; B29C48/0018; B29C48/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
Apparatus for forming discrete, shaped, interlayer blanks comprising, in combination: (a) an extrusion die containing a slot for forming a sheet from thermoplastic melt; (b) means associated with the die for causing a portion of the melt to exit the slot at a greater mass flow rate than that of the remainder of the melt exiting the slot; (c) means adjacent the die for quenching the sheet immediately after forming; and (d) frusto-conical pull rolls for forwardly shaping the sheet into arcuate form, surfaces of said rolls adjacent edges of greatest circumference positioned to contact the portion of the sheet formed from the melt exiting the slot at the greater mass flow rate.
Claim 2
Dependent Claim
113 words
Apparatus for forming discrete, shaped, interlayer blanks comprising, in combination: (a) an extrusion die containing a slot for forming a sheet from thermoplastic melt; (b) means associated with the die for causing a portion of the melt to exit the slot at a greater mass flow rate than that of the remainder of the melt exiting the slot; (c) means adjacent the die for quenching the sheet immediately after forming; and (d) frusto-conical pull rolls for forwardly shaping the sheet into arcuate form, surfaces of said rolls adjacent edges of greatest circumference positioned to contact the portion of the sheet formed from the melt exiting the slot at the greater mass flow rate.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1 wherein said means for quenching comprises a cooling bath subjacent the die in which at least one of said rolls is immersed.
Claim 4
Dependent Claim
22 words
The apparatus of claim 1 including cutting means beyond said rolls for severing quadrilateral sections from said sheet to form said blanks.
References Cited (Backward Citations)
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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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |