US3764251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for extruding synthetic material
Assignee: Bischof and Klein SE and Co KG
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Filing: 1971-10-18
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Granted: 1973-10-09
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Expires: 1991-10-18
Abstract
Abstract A blower ring for a tube extrusion die has passage means through which secondary cooling air from the environment is induced to flow into the cooling gas stream issuing from the blower orifice thereby intensifying the rate of cooling, increasing the extrusion performance and reducing the mechanical loading of the extrusion prior to its solidification.
Inventors
- 👤 F Konerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:33
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/885; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/911; B29C48/9115; B29C48/912
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
In a device for extruding synthetic material, said device having an extrusion die with an extrusion orifice, and means to supply the die with plastic material under extruding pressure, the improvement which comprises a blower ring surrounding the extrusion die, said blower ring having a conical inner wall which expands in a downstream direction, said blower ring blowing gas upon the extruded material coming out of the die orifice, means to supply the blower ring with cool gas under pressure, the inner wall of the blower ring having a ring slit forming an aperture directing the cool gas stream approximately in a downstream direction along the axis of the extruded material, the blower ring having a ring opening downstream of and near the ring slit, a channel with adjustable cross-section for conducting a cool gas stream to the ring opening, the flow of pressure gas through the ring slit inducing the flow of ambient air through the ring opening adjacent thereto and thus in through said channel.
Claim 2
Dependent Claim
167 words
In a device for extruding synthetic material, said device having an extrusion die with an extrusion orifice, and means to supply the die with plastic material under extruding pressure, the improvement which comprises a blower ring surrounding the extrusion die, said blower ring having a conical inner wall which expands in a downstream direction, said blower ring blowing gas upon the extruded material coming out of the die orifice, means to supply the blower ring with cool gas under pressure, the inner wall of the blower ring having a ring slit forming an aperture directing the cool gas stream approximately in a downstream direction along the axis of the extruded material, the blower ring having a ring opening downstream of and near the ring slit, a channel with adjustable cross-section for conducting a cool gas stream to the ring opening, the flow of pressure gas through the ring slit inducing the flow of ambient air through the ring opening adjacent thereto and thus in through said channel.
Claim 3
Dependent Claim
44 words
A device according to claim 1, wherein the ring opening for the introduction of ambient air through the channel is provided with an entrance opening in its downstream side, the supply of cool gas being connected to the blow ring at its upstream side.
Claim 4
Dependent Claim
40 words
A device according to claim 1, wherein the blower ring is provided with a downstream and an upstream lip the spacing of which is changeable by an adjustment ring whereby to vary the ring-formed openings for the cool gas stream.
Claim 5
Dependent Claim
49 words
A device according to claim 3, wherein the downstream lip of the adjustment ring comprises two radially spaced ring bodies which form said channel between them, the inner ring body facing the extruded material being adjustable relative to the outer ring body along the axis of the blow ring.
Claim 6
Dependent Claim
23 words
A device in accordance with claim 1, wherein the ring bodies are disposed coaxial, and the channel formed therebetween is of annular cross-section.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |