US3577587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making reticulated structures
Assignee: FMC Corp
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Filing: 1968-11-22
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Granted: 1971-05-04
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Expires: 1988-11-22
Abstract
Abstract Apparatus for making reticulated structures by periodically contacting adjacent streams of a series of generally like streams of flowable material as they are extruded along sinuous paths, and thereafter setting the extruded streams.
Inventors
- 👤 Theodore H Fairbanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:12
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/345; B29C48/03; B29C48/09; B29C48/11; B29C48/13; B29C48/07; B29C48/08; B29L; B29L2028/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
Apparatus for extruding a reticulated structure including a housing, means for delivering a flowable material into said housing under pressure, spaced opposing walls together defining an opening in said housing, a series of spaced partitions positioned within said housing and having free ends extending between said opposing walls and terminating at least within said housing opening, each of said partitions having surfaces extending transversely of said housing opening and together defining an extrusion orifice, means for providing relative longitudinal movement between adjacent of said partitions so that each projects beyond the other in alternate relationship, and means outwardly of said housing opening for setting the flowable material issuing from said extrusion orifices.
Claim 2
Dependent Claim
112 words
Apparatus for extruding a reticulated structure including a housing, means for delivering a flowable material into said housing under pressure, spaced opposing walls together defining an opening in said housing, a series of spaced partitions positioned within said housing and having free ends extending between said opposing walls and terminating at least within said housing opening, each of said partitions having surfaces extending transversely of said housing opening and together defining an extrusion orifice, means for providing relative longitudinal movement between adjacent of said partitions so that each projects beyond the other in alternate relationship, and means outwardly of said housing opening for setting the flowable material issuing from said extrusion orifices.
Claim 3
Dependent Claim
35 words
Apparatus as defined in claim 1 wherein at least portions of saiD opposing surfaces of each pair of adjacent of said partitions extend in converging relationship in the areas adjacent to the free ends thereof.
Claim 4
Dependent Claim
49 words
Apparatus as defined in claim 1 wherein said means for moving said partitions includes means for reciprocating said partitions longitudinally thereof relative to said housing and the walls defining said housing opening, with alternate partitions moving in unison and substantially 180* out of phase with the partitions adjacent thereto.
Claim 5
Dependent Claim
41 words
Apparatus as defined in claim 2 wherein the converging portions of the opposing surfaces of adjacent partitions are in the form of opposing lips, the inner faces of which are of concave configuration in the longitudinal direction of the respective partitions.
Claim 6
Dependent Claim
63 words
Apparatus as defined in claim 2 wherein the converging portions of the opposing surfaces of each pair of adjacent partitions are spaced from each other and together with the walls of the housing opening define an extrusion orifice of rectangular configuration, the spacing between said opposing surfaces at the free ends of said partitions being less than the width of said housing opening.
Claim 7
Dependent Claim
71 words
Apparatus as defined in claim 2 wherein the opposing surfaces of each pair of adjacent of said partitions include opposing grooves extending longitudinally thereof in the area adjacent to their free ends, said grooves being concave in cross section and together defining an orifice of generally circular configuration and wherein portions of said opposing grooves directly adjacent to the free ends of said partitions are in converging relationship with each other.
Claim 8
Dependent Claim
41 words
Apparatus as defined in claim 6 wherein said grooves are of less width than said housing opening and the portions of the opposing surfaces of each pair of adjacent partitions outside of said grooves are in sliding contact with each other.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |