US3857664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming apparatus for multiple stream shaping
Assignee: Atlantic Richfield Co
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Filing: 1973-11-28
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Granted: 1974-12-31
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Expires: 1993-11-28
Abstract
Abstract A roll forming apparatus is described for simultaneous shaping of a plurality of thermoplastic streams or extrudates. The shaping is accomplished by conveying the extrudates through confined passages formed when projections on a roll intermesh with grooves on an adjacent roll.
Inventors
- 👤 K Johnson
- 👤 A Limbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:21
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B29C43/00; B29C43/22; B29C43/222; B29C48/00; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/25; B29C48/30; B29C48/35; Y; Y10; Y10S; Y10S425/00; Y10S425/235
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A roll forming apparatus for simultaneous shaping of a plurality of extrudates comprising in combination, a. a first roll having a plurality of projections on its surface; b. a second roll having a plurality of grooves in its surface; c. said first and second rolls being located adjacent one another such that the projections of said first roll intermesh with the grooves of said second roll; d. the height of said projections beyond the first roll being less than the depth of said grooves in the second roll such that when said projections intermesh with said grooves, a plurality of confined passages of predetermined configuration are defined between the tops of said projections and the bottoms of said grooves; and e. said projections being formed by a plurality of self-aligning bronze rings coaxially mounted over a smooth steel roll, such that as the steel roll expands or contracts, said rings may slide coaxially to remain aligned with the grooves of said second roll.
Claim 2
Dependent Claim
163 words
A roll forming apparatus for simultaneous shaping of a plurality of extrudates comprising in combination, a. a first roll having a plurality of projections on its surface; b. a second roll having a plurality of grooves in its surface; c. said first and second rolls being located adjacent one another such that the projections of said first roll intermesh with the grooves of said second roll; d. the height of said projections beyond the first roll being less than the depth of said grooves in the second roll such that when said projections intermesh with said grooves, a plurality of confined passages of predetermined configuration are defined between the tops of said projections and the bottoms of said grooves; and e. said projections being formed by a plurality of self-aligning bronze rings coaxially mounted over a smooth steel roll, such that as the steel roll expands or contracts, said rings may slide coaxially to remain aligned with the grooves of said second roll.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein said bronze rings are provided with means for preventing rotation around the central roll while maintaining the ability to slide coaxially on the roll.
Claim 4
Dependent Claim
52 words
The apparatus of claim 1 wherein the grooves on the second roll are formed by a plurality of self-aligning bronze rings coaxially mounted over a smooth steel roll, such that as the steel roll expands or contracts, said rings may slide coaxially to remain aligned with the projections of said first roll.
Claim 5
Dependent Claim
16 words
The apparatus of claim 1 wherein said plurality of confined passages define a single predetermined configuration.
Claim 6
Dependent Claim
17 words
The apparatus of claim 1 wherein said plurality of confined passages define a multiplicity of predetermined configurations.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |