Patent US3852013A successfully refreshed from Google Patents.
US3852013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder for plastics material, particularly thermoplastic or non-cross-linked elastomeric materials
Assignee: Individual
•
Filing: 1973-09-19
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Granted: 1974-12-03
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Expires: 1993-09-19
Abstract
Abstract In an extruder according to the parent patent, each outermost laminar channel is sub-divided by means of a central blade so that one half opens into one of the part-passages and the other half opens into the other part-passage.
Inventors
- 👤 H Upmeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/695; B29C48/03; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87885
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
An extruder for plastics material, wherein a supply passage for the material is provided with a distributor for dividing the flow of material into two or more branch passages leading to processing tools for the material, and the distributor comprises conduits corresponding in number to the number of branch passages, the inlets of said conduits being disposed in the supply passage and said conduits opening into a respective one of the branch passages, wherein further the conduits comprise a plurality of laminar channels which open on alternate sides into a respective one of the branch passages and the inlets of which extend over the entire cross-section of the supply passage, each outermost laminar channel being subdivided by means of a central blade so that one half opens into one of the part-passages and the other half opens into the other part-passage.
Claim 2
Dependent Claim
141 words
An extruder for plastics material, wherein a supply passage for the material is provided with a distributor for dividing the flow of material into two or more branch passages leading to processing tools for the material, and the distributor comprises conduits corresponding in number to the number of branch passages, the inlets of said conduits being disposed in the supply passage and said conduits opening into a respective one of the branch passages, wherein further the conduits comprise a plurality of laminar channels which open on alternate sides into a respective one of the branch passages and the inlets of which extend over the entire cross-section of the supply passage, each outermost laminar channel being subdivided by means of a central blade so that one half opens into one of the part-passages and the other half opens into the other part-passage.
Claim 3
Dependent Claim
19 words
An extruder according to claim 1, wherein an uneven number of distributor plates is provided with milled laminar channels.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |