US3309185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making filamentous mats
Assignee: American Air Filter Co Inc
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Filing: 1962-09-10
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Granted: 1967-03-14
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 George K Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:54
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; B; B29; B29C; B29C48/00; B29C48/03; B29C48/13; B29C53/00; B29C53/56; B29C53/58; B29C53/60; B29C48/05; B29C48/07; B29C48/08; B29L; B29L2028/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24083; Y10T428/249921; Y10T428/249922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
THE METHOD OF MAKING A PORTION OF A FILAMENTOUS MAT COMPRISING: (A) ROTATING A CYLINDER ABOUT ITS LONGITUDINAL AXIS; (B) FEEDING FILAMENTS FROM FILAMENT FEEDING MEANS TO SAID ROTATING CYLINDER; (C) COLLECTING ALL OF SAID FILAMENTS ON A CIRCUMFERENTIAL SURFACE OF SAID CYLINDER BETWEEN THE ENDS THEREOF; (D) ROTATING THE ENDS OF SAID CYLINDER ABOUT A SECOND AXIS SO THE LONGITUDINAL AXIS OF SAID CYLINDER GENERATES OPPOSITE RIGHT CONES OF SELECTED EQUAL APEX ANGLES ON OPPOSITE SIDES OF THE MID-POINT OF SAID CYLINDER SO THE SPEED, RELATIVE TO SAID FEEDER MEANS, OF THE INCREMENTAL PORTIONS OF SAID CYLINDRICAL SURFACE RECEIVING SAID FILAMENTS FROM SAID FEEDER IS COMPARATIVELY CONSTANT WHEREBY A CYLINDRICAL FILAMENTOUS MAT IS FORMED ON SAID CYLINDER WHEREIN THE WIDTH OF SAID MAT IS DETERMINED BY SAID ANGLES AND THE SPACING BETWEEN ADJACENT FILAMENTS LAID ON SAID SURFACE IS DETERMINED BY THE RELATIVE SPEED OF ROTATION OF SAID DRUM ABOUT SAID FIRST AXIS AND THE SPEED OF ROTATION OF SAID ENDS AROUND SAID SECOND AXIS; AND, (E) REMOVING SAID CYLINDRICAL, FILAMENTOUS MAT AS A WHOLE IN SHEET FORM FROM SAID CYLINDER.
Claim 2
Independent Claim
182 words
THE METHOD OF MAKING A PORTION OF A FILAMENTOUS MAT COMPRISING: (A) ROTATING A CYLINDER ABOUT ITS LONGITUDINAL AXIS; (B) FEEDING FILAMENTS FROM FILAMENT FEEDING MEANS TO SAID ROTATING CYLINDER; (C) COLLECTING ALL OF SAID FILAMENTS ON A CIRCUMFERENTIAL SURFACE OF SAID CYLINDER BETWEEN THE ENDS THEREOF; (D) ROTATING THE ENDS OF SAID CYLINDER ABOUT A SECOND AXIS SO THE LONGITUDINAL AXIS OF SAID CYLINDER GENERATES OPPOSITE RIGHT CONES OF SELECTED EQUAL APEX ANGLES ON OPPOSITE SIDES OF THE MID-POINT OF SAID CYLINDER SO THE SPEED, RELATIVE TO SAID FEEDER MEANS, OF THE INCREMENTAL PORTIONS OF SAID CYLINDRICAL SURFACE RECEIVING SAID FILAMENTS FROM SAID FEEDER IS COMPARATIVELY CONSTANT WHEREBY A CYLINDRICAL FILAMENTOUS MAT IS FORMED ON SAID CYLINDER WHEREIN THE WIDTH OF SAID MAT IS DETERMINED BY SAID ANGLES AND THE SPACING BETWEEN ADJACENT FILAMENTS LAID ON SAID SURFACE IS DETERMINED BY THE RELATIVE SPEED OF ROTATION OF SAID DRUM ABOUT SAID FIRST AXIS AND THE SPEED OF ROTATION OF SAID ENDS AROUND SAID SECOND AXIS; AND, (E) REMOVING SAID CYLINDRICAL, FILAMENTOUS MAT AS A WHOLE IN SHEET FORM FROM SAID CYLINDER.
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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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |