US3283041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for controlling pressure in a plastic extruding machine
Assignee: Individual
•
Filing: 1963-05-09
•
Granted: 1966-11-01
•
Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 Sommerfeld Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/78; B29C48/875; B29C48/36; B29C48/50; B29C48/505; B29C48/51; B29C48/515; B29C48/80; B29C48/84; B29C48/85; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92009; B29C2948/92019; B29C2948/92323; B29C2948/92361; B29C2948/9238; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/926; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92885; B29C2948/92904; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF CONTROLLING THE PRESSURE OF PLASTIC MATERIAL FLOWING THROUGH AN EXTRUDING MACHINE HAVING A CYLINDRICAL BORE LEADING TO AN EXIT ORIFICE AND A FEED SCREW HAVING A BODY AND A NOSE AND ROTATING IN SAID BORE, THE METHOD COMPRISING THE FOLLOWING STEPS; COOLING SAID NOSE ONLY, WITH A FLUID COOLING MEDIUM FLOWING IN A CHAMBER IN HEAT EXCHANGE RELATIONSHIP WITH SAID BORE, SENSING THE DEVIATION OF THE PRESSURE OF SAID PLASTIC MATERIAL IN SAID BORE WITH RESPECT TO A PREDETERMINED PRESSURE, AND CONTROLLING THE FLOW OF SAID COOLING MEDIUM IN ACCORDANCE WITH SAID DEVIATION OF MAINTAIN THE PRESSURE DESIRED TO BE IMPARTED TO SAID PLASTIC MATERIAL IN SAID BORE AND ADJACENT SAID EXIT ORIFICE.
Claim 2
Independent Claim
116 words
A METHOD OF CONTROLLING THE PRESSURE OF PLASTIC MATERIAL FLOWING THROUGH AN EXTRUDING MACHINE HAVING A CYLINDRICAL BORE LEADING TO AN EXIT ORIFICE AND A FEED SCREW HAVING A BODY AND A NOSE AND ROTATING IN SAID BORE, THE METHOD COMPRISING THE FOLLOWING STEPS; COOLING SAID NOSE ONLY, WITH A FLUID COOLING MEDIUM FLOWING IN A CHAMBER IN HEAT EXCHANGE RELATIONSHIP WITH SAID BORE, SENSING THE DEVIATION OF THE PRESSURE OF SAID PLASTIC MATERIAL IN SAID BORE WITH RESPECT TO A PREDETERMINED PRESSURE, AND CONTROLLING THE FLOW OF SAID COOLING MEDIUM IN ACCORDANCE WITH SAID DEVIATION OF MAINTAIN THE PRESSURE DESIRED TO BE IMPARTED TO SAID PLASTIC MATERIAL IN SAID BORE AND ADJACENT SAID EXIT ORIFICE.
References Cited (Backward Citations)
US2653348A
Cited
US2722716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |