US3770357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion die
Assignee: American Optical Corp
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Filing: 1971-11-15
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Granted: 1973-11-06
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Expires: 1991-11-15
Abstract
Abstract A die for extruding varigated plastic sheet stock. The die is a multiple extrusion die having a main die structure which receives a supply of plastic material of one color and emits the varigated extrusion while a second die enclosed within the main die structure receives a plastic material of a second color along with the material of said one color and extrudes the two materials in the form of a multiplicity of alternate juxtapositioned strips into an extrusion orifice of the main die structure. Compression of the inner die extrudate taking place between die lips of the main structure blends the differently colored plastic materials together with retention of the general configuration of pattern produced by the inner die.
Inventors
- 👤 L Gibney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:16
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/304; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/17; B29C48/175
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
300 words
A multiple die for producing a unitary composite extrusion of varigated plastic material comprising: a main body structure having an entrance port for receiving a first supply of flowable plastic material of one color, a passageway extending tHrough said main body structure and a main extrusion orifice through which said unitary extrusion is emitted, said entrance port, passageway and extrusion orifice being all coaxially aligned with each other in a direction straight through said main body structure; a supplementary extrusion die enclosed within said main body structure, said supplementary die having a first plurality of inlet ports along one side thereof all disposed within said passageway of said main body structure for receiving said plastic material of said one color and a second plurality of inlet ports all disposed along a side adjacent to said one side of said supplementary die for receiving a second supply of flowable plastic material of a different color than that of said first supply, said supplementary die further having a succession of juxtapositioned extrusion orifices oppositely of and all aligned with said first plurality of inlet ports, said succession of extrusion orifices all being so disposed as to open into said main extrusion orifice of said main body structure whereby a composite extrudate of said first and second plastic materials, when each is forced under pressure into said multiple die, is extruded into said main extrusion orifice from said succession of extrusion orifices of said supplementary die; and die lips in said main extrusion orifice of a size and shape rendering said orifice smaller than the cross-sectional size of said composite extrudate whereby said composite extrudate is compressed prior to its emission from said main extrusion orifice into said unitary extrusion of varigated plastic material, the latter being emitted from said main extrusion orifice.
Claim 2
Dependent Claim
300 words
A multiple die for producing a unitary composite extrusion of varigated plastic material comprising: a main body structure having an entrance port for receiving a first supply of flowable plastic material of one color, a passageway extending tHrough said main body structure and a main extrusion orifice through which said unitary extrusion is emitted, said entrance port, passageway and extrusion orifice being all coaxially aligned with each other in a direction straight through said main body structure; a supplementary extrusion die enclosed within said main body structure, said supplementary die having a first plurality of inlet ports along one side thereof all disposed within said passageway of said main body structure for receiving said plastic material of said one color and a second plurality of inlet ports all disposed along a side adjacent to said one side of said supplementary die for receiving a second supply of flowable plastic material of a different color than that of said first supply, said supplementary die further having a succession of juxtapositioned extrusion orifices oppositely of and all aligned with said first plurality of inlet ports, said succession of extrusion orifices all being so disposed as to open into said main extrusion orifice of said main body structure whereby a composite extrudate of said first and second plastic materials, when each is forced under pressure into said multiple die, is extruded into said main extrusion orifice from said succession of extrusion orifices of said supplementary die; and die lips in said main extrusion orifice of a size and shape rendering said orifice smaller than the cross-sectional size of said composite extrudate whereby said composite extrudate is compressed prior to its emission from said main extrusion orifice into said unitary extrusion of varigated plastic material, the latter being emitted from said main extrusion orifice.
Claim 3
Dependent Claim
63 words
A multiple extrusion die according to claim 1 wherein said inlet ports and extrusion orifices of said supplementary die are formed between a series of juxtapositioned sets of barrier plates, each set comprising a pair of said plates spaced from one another to form an extrusion channel therebetween and separating plates between said barrier plates functioning to separate said channels from one another.
Claim 4
Dependent Claim
63 words
A multiple extrusion die according to claim 2 wherein said inlet ports between alternate sets of said barrier plates extend along one side of said supplementary die, inlet ports between remaining sets of said barrier plates extend along another adjacent side of said supplementary die and extrusion orifices between all of said barrier plates extend along a third side of said supplementary die.
Claim 5
Dependent Claim
38 words
A multiple extrusion die according to claim 3 wherein said supplementary die includes a diverter plate for distributing said second supply of plastic material in substantially uniform amounts into each of said inlet ports of said supplementary die.
Claim 6
Dependent Claim
29 words
A multiple extrusion die according to claim 3 including means for directing said secondary supply of said plastic material through said main body structure directly into said diverter plate.
Claim 7
Dependent Claim
213 words
Apparatus for producing a unitary composite extrusion of varigated plastic material comprising the combination of: a main extrusion die having an internal cavity, an entrance port for receiving and directing a first supply of flowable plastic material of one color into said cavity and a main extrusion orifice leading from said cavity externally of said apparatus through which said unitary composite extrusion may be emitted said entrance port and extrusion orifice being aligned with each other in a direction straight through said main extrusion die; a supplementary extrusion die within said cavity of said main extrusion die, said supplementary die having a first plurality of inlet ports within said cavity of said main extrusion die for receiving said plastic material of said one color and a second plurality of inlet ports for receiving a second supply of a flowable plastic material of a different color than that of said first supply, said supplementary die further having a succession of juxtapositioned extrusion orifices respectively alternately communiCating with said first and second plurality of inlet ports, said extrusion orifices of said supplementary extrusion die all opening into said main extrusion orifice of said main extrusion die whereby a composite extrudate of said first and second plastic materials may be extruded into said main extrusion orifice.
Claim 8
Dependent Claim
213 words
Apparatus for producing a unitary composite extrusion of varigated plastic material comprising the combination of: a main extrusion die having an internal cavity, an entrance port for receiving and directing a first supply of flowable plastic material of one color into said cavity and a main extrusion orifice leading from said cavity externally of said apparatus through which said unitary composite extrusion may be emitted said entrance port and extrusion orifice being aligned with each other in a direction straight through said main extrusion die; a supplementary extrusion die within said cavity of said main extrusion die, said supplementary die having a first plurality of inlet ports within said cavity of said main extrusion die for receiving said plastic material of said one color and a second plurality of inlet ports for receiving a second supply of a flowable plastic material of a different color than that of said first supply, said supplementary die further having a succession of juxtapositioned extrusion orifices respectively alternately communiCating with said first and second plurality of inlet ports, said extrusion orifices of said supplementary extrusion die all opening into said main extrusion orifice of said main extrusion die whereby a composite extrudate of said first and second plastic materials may be extruded into said main extrusion orifice.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |