US3617593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making reinforced ignition-tube of reinforced polyurethane foam
Assignee: Teledyne Inc
•
Filing: 1968-05-01
•
Granted: 1971-11-02
•
Expires: 1988-05-01
Abstract
Abstract A method of making a reinforce foam polyurethane ignition tube by selecting a length of woven polyester sleeve which exceeds the length of the mold cavity said sleeve having a weave pattern which causes the sleeve to expand radially upon axial compression and to contract radially upon axial elongation, inserting the sleeve into a cylindrical mold cavity, axially compressing the sleeve into conformity with the outer forming surface of the mold cavity, charging the cavity with foamable polyurethane and allowing the polyurethane to foam and unite with the sleeve. The sleeve lies contiguous with the outer surface of the tube and serves to reinforce the tube.
Inventors
- 👤 Sterling W Alderfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:09
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/085; B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/1209; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B29C70/222; B29C70/28; B29C70/54; B29C70/541; F42B; F42B5/00; F42B5/38; B29K; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/24; Y; Y10; Y10S; Y10S102/00; Y10S102/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A method for making a reinforced ignition tube, as set forth in claim 9, in which the axial compression of the sleeve radially expands the sleeve until it adapts to and lies contiguous with the radially outer surface of the cavity so that the sleeve will be encased within the tube in juxtaposition with the outer surface of the tube.
Claim 2
Dependent Claim
77 words
A method for making a reinforced ignition tube, as set forth in claim 9, in which the weaving step comprises forming strands of two filaments, arranging the strands in helical orientations of intersecting right- and left-hand lays, intertwining the two filaments in each strand of left-hand lay in a plain weave with the intersecting strands of right-hand lay, crossing the two filaments in the strands of each lay between their intersections with the strands of opposite lay.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |