US3754847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat die for extruding laminated synthetic resin sheets
Assignee: Ikegai Corp
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Filing: 1971-06-28
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Granted: 1973-08-28
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Expires: 1991-06-28
Abstract
Abstract A flat-die for extruding laminated synthetic resin sheets is composed of a plurality of flow passages for resins, each of which is connected, at its one end, to a hollow distributing chamber containing a distributing screw to be supplied with the resin from respective extruders and terminates in a lip at its other end, said lips being arranged so that they provide a number of openings lying side by side.
Inventors
- 👤 T Sawada
- 👤 T Fujisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/313; B29C48/001; B29C48/0013; B29C48/0014; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/21; B29C48/307
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
A flat die for extruding laminated synthetic resin sheets, comprising a common die body, a first elongated distributing chamber in said body, an elongated hollow chamber in said body generally parallel to said first distributing chamber and having an elongated lateral opening from one side thereof, said first distributing chamber having an elongated lateral opening therein opening into the other side of said hollow chamber, a second elongated distributing chamber within said hollow chamber and spaced from the walls thereof to define with said hollow chamber two flow passages around the opposite sides of said second distributing chamber, said second distributing chamber having an extension thereon extending into the elongated lateral opening on the one side of said elongated hollow chamber and having an elongated opening therein, said extension being spaced from the elongated opening to define extensions of the two flow passages around said second distributing chamber, and an extruder screw in each of said distributing chambers.
Claim 2
Dependent Claim
158 words
A flat die for extruding laminated synthetic resin sheets, comprising a common die body, a first elongated distributing chamber in said body, an elongated hollow chamber in said body generally parallel to said first distributing chamber and having an elongated lateral opening from one side thereof, said first distributing chamber having an elongated lateral opening therein opening into the other side of said hollow chamber, a second elongated distributing chamber within said hollow chamber and spaced from the walls thereof to define with said hollow chamber two flow passages around the opposite sides of said second distributing chamber, said second distributing chamber having an extension thereon extending into the elongated lateral opening on the one side of said elongated hollow chamber and having an elongated opening therein, said extension being spaced from the elongated opening to define extensions of the two flow passages around said second distributing chamber, and an extruder screw in each of said distributing chambers.
Claim 3
Dependent Claim
110 words
A flat die as claimed in claim 1 in which said common die body has a recess therein, a flow guide in said recess defining the portion of said hollow chamber on the side of said second distributing chamber toward said first distributing chamber, a spacer in said recess against said flow guide defining the portion of said hollow chamber toward said lateral opening from said hollow chamber, and a mouthpiece in said recess against said spacer and having said lateral opening from said hollow chamber therein, and retaining means on said die body engaging said mouthpiece for holding said flow guide, said spacer and said mouthpiece in said recess.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |