US3877860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extrusion machine for making articles of cement-like material
Assignee: DY-CORE SYSTEMS Inc
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Filing: 1970-09-03
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Granted: 1975-04-15
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Expires: 1990-09-03
Abstract
Abstract An extrusion machine for continuously making articles, such as concrete slabs, by forcing the article-forming material through a mold, said machine being moved forwardly by reaction as the material is forced against the portion of the article already formed. The material is moved under pressure by one or more spiral conveyors through the mold, and a forming element of any predetermined cross-sectional shape is substantially aligned with the down-stream end of each spiral conveyor and is mounted so as not to rotate with the latter. It is perferable to provide a vibrator in each forming element.
Inventors
- 👤 George Putti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:01
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/20; B28B3/22; B28B3/228; B28B1/00; B28B1/08; B28B1/084
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
213 words
In an extrusion machine including a mold for making elongated articles of concrete-like moldable material by forcing the material through said mold, said machine including means for feeding said moldable material to said mold, said machine being moved forwardly by reaction as the material is forced against the molded portion of the article, said machine including means for guiding the forward motion of said machine along a path for forming the molded material as an elongate body in said path, the improvement which comprises: a rotatable spiral conveyor in and extending longitudinally of the mold for moving the material under pressure through the mold and against material that has set into the cross-sectional shape dictated by the cross-sectional shape of the mold, said conveyor including a spiral flight along its length and a forming element of non-circular cross-sectional shape immediately following the down-stream end of the spiral conveyor at the downstream end of said spiral flight and mounted so as not to be rotated by the conveyor, means for controlling the rotation of said forming element relative to the rotation of said conveyor, said conveyor moving the material under pressure over the forming element whereby said element forms a core of said predetermined cross-sectional shape in the article as it is being formed.
Claim 2
Dependent Claim
213 words
In an extrusion machine including a mold for making elongated articles of concrete-like moldable material by forcing the material through said mold, said machine including means for feeding said moldable material to said mold, said machine being moved forwardly by reaction as the material is forced against the molded portion of the article, said machine including means for guiding the forward motion of said machine along a path for forming the molded material as an elongate body in said path, the improvement which comprises: a rotatable spiral conveyor in and extending longitudinally of the mold for moving the material under pressure through the mold and against material that has set into the cross-sectional shape dictated by the cross-sectional shape of the mold, said conveyor including a spiral flight along its length and a forming element of non-circular cross-sectional shape immediately following the down-stream end of the spiral conveyor at the downstream end of said spiral flight and mounted so as not to be rotated by the conveyor, means for controlling the rotation of said forming element relative to the rotation of said conveyor, said conveyor moving the material under pressure over the forming element whereby said element forms a core of said predetermined cross-sectional shape in the article as it is being formed.
Claim 3
Dependent Claim
19 words
A machine as claimed in claim 1 in which said forming element is substantially aligned with said spiral conveyor.
Claim 4
Dependent Claim
22 words
A machine as claimed in claim 1 in which said spiral conveyor comprises a core shaft with a spiral flight wound therearound.
Claim 5
Dependent Claim
40 words
A machine as claimed in claim 3 in which the flights of the conveyor at least towards the down-stream end thereof have radial faces lying substantially normal to the axis of the core shaft and facing towards said down-stream end.
Claim 6
Dependent Claim
25 words
A machine as claimed in claim 4 in which the upstream faces of said flights are inclined relative to a radius of the core shaft.
Claim 7
Dependent Claim
20 words
A machine as claimed in claim 3 in which said core shaft has a constant diameter throughout the length thereof.
Claim 8
Dependent Claim
20 words
A machine as claimed in claim 3 in which said core shaft increases in diameter towards the down-stream end thereof.
Claim 9
Dependent Claim
35 words
A machine as claimed in claim 7 in which the flights of the conveyor progressively increase in diameter towards the downstream end of the conveyor over that portion of the core shaft of increasing diameter.
Claim 10
Dependent Claim
38 words
A machine as claimed in claim 8 in which the upstream end of the core forming element diverges towards the downstream end of the core shaft and down to the size and cross-sectional shape of said downstream end.
Claim 11
Dependent Claim
39 words
A machine as claimed in claim 7 in which the flights of the conveyor at least towards the downstream end thereof have radial faces lying substantially normal the axis of the core shaft and facing towards said down-stream end.
Claim 12
Dependent Claim
35 words
A machine as claimed in claim 7 in which the upstream end of the core forming element diverges towards the downstream end of the core shaft and to the cross-sectional shape of said downstream end.
Claim 13
Dependent Claim
42 words
A machine as claimed in claim 3 in which said core shaft is hollow, and including a supporting shaft extending through and beyond the down-stream end of the spiral conveyor, said forming element being mounted on and carried by said supporting shaft.
Claim 14
Dependent Claim
22 words
A machine as claimed in claim 1 inCluding means for removably mounting said forming element in position relative to the spiiral conveyor.
Claim 15
Dependent Claim
22 words
A machine as claimed in claim 12 including means for removably mounting said forming element in position relative to the spiral conveyor.
Claim 16
Dependent Claim
15 words
A machine as claimed in claim 1 including a vibrator mounted within said forming element.
Claim 17
Dependent Claim
15 words
A machine as claimed in claim 12 including a vibrator mounted within said forming element.
Claim 18
Dependent Claim
23 words
A machine as claimed in claim 1 including means connected to the forming element to rotate said element independently of the spiral conveyor.
Claim 19
Dependent Claim
19 words
A machine as claimed in claim 1 in which said forming element is in a plurality of interconnected sections.
Claim 20
Dependent Claim
19 words
A machine as claimed in claim 18 in which said forming element sections are detachably connected to each other.
Claim 21
Dependent Claim
35 words
A machine as claimed in claim 1 in which said forming element is in a plurality of interconnected sections and including a vibrator in the downstream section next to the end of the spiral conveyor.
Claim 22
Dependent Claim
27 words
A machine as claimed in claim 20 including vibration dampener means forming the connection between forming element section with the vibrator therein and the section next thereto.
Claim 23
Dependent Claim
61 words
A machine as claimed in claim 1 including a frame having side members adapted to co-operate with a base to create a forming space therebetween, said mold being positioned in and extending longitudinally of said forming space and said base being the bottom wall of the mold, said spiral conveyor being positioned in the forming spaced and extending into the mold.
Claim 24
Dependent Claim
44 words
A machine as claimed in claim 22 in which said mold includes a substantially horizontal top plate and substantially vertical spaced side plates, and including means for changing the angles of said top and side plates relative to the longitudinal axis of the mold.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |