US3076228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming corrugated tubes, especially for making gaskets, and the product thereof
Assignee: Individual
•
Filing: 1960-11-07
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Granted: 1963-02-05
•
Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:34
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/30; B29C63/00; B29K; B29K2021/00; B29K2027/00; B29K2027/12; B29K2027/18; B29K2709/00; B29K2709/02; B29K2711/00; B29K2711/02; B29L; B29L2031/00; B29L2031/26; B29L2031/265; B29L2031/709; B29L2031/7096; B29L2031/7098; Y; Y10; Y10S; Y10S264/00; Y10S264/52; Y10T; Y10T29/00; Y10T29/49; Y10T29/49787; Y10T29/49826; Y10T29/49908; Y10T29/49915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF CORRUGATING TUBES, AS FOR MAKING GASKETS WITH A SHEATHED CORE, WHICH COMPRISES, PLACING AN ANNULAR CORE ON A TUBE TO BE EXPANDED, PLACING AXIALLY DIVIDED ANNULAR DIE ELEMENTS OVER AND AROUND SAID CORE, SUPPORTING AND HOLDING THE TUBE ON EITHER SIDE OF THE DIE ELEMENTS AND CORE AT SUCH DISTANCE AS TO PROVIDE CORRUGATIONS ON OPPOSITE SIDES OF THE CORE WHICH WILL BE RADIALLY AS DEEP AS THE CORE, APPLYING FLUID PRESSURE WITHIN THE TUBE WHILE COMPRESSING IT AXIALLY TO FORM CORRUGATIONS ON EACH SIDE OF THE DIE ELEMENTS AND CORE, REMOVING THE DIVIDED DIE ELEMENTS FROM THE CORE, AND SQUEEZING THE CORRUGATED TUBE AXIALLY TO CLOSELY ENVELOP THE CORE IN THE ANNULAR VALLEY SPACE BETWEEN CORRUGATIONS.
Claim 2
Independent Claim
120 words
THE METHOD OF CORRUGATING TUBES, AS FOR MAKING GASKETS WITH A SHEATHED CORE, WHICH COMPRISES, PLACING AN ANNULAR CORE ON A TUBE TO BE EXPANDED, PLACING AXIALLY DIVIDED ANNULAR DIE ELEMENTS OVER AND AROUND SAID CORE, SUPPORTING AND HOLDING THE TUBE ON EITHER SIDE OF THE DIE ELEMENTS AND CORE AT SUCH DISTANCE AS TO PROVIDE CORRUGATIONS ON OPPOSITE SIDES OF THE CORE WHICH WILL BE RADIALLY AS DEEP AS THE CORE, APPLYING FLUID PRESSURE WITHIN THE TUBE WHILE COMPRESSING IT AXIALLY TO FORM CORRUGATIONS ON EACH SIDE OF THE DIE ELEMENTS AND CORE, REMOVING THE DIVIDED DIE ELEMENTS FROM THE CORE, AND SQUEEZING THE CORRUGATED TUBE AXIALLY TO CLOSELY ENVELOP THE CORE IN THE ANNULAR VALLEY SPACE BETWEEN CORRUGATIONS.
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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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |