US3360352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of shaping the open end of glass tubes between cooperating rollers
Assignee: Corning Glass Works
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Filing: 1964-08-25
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Granted: 1967-12-26
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 Roy N Sundstrom
- 👤 Arthur H Wilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/04; C03B23/09; C03B23/095
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
142 words
IN AN APPARATUS FOR FORMING THE OPEN END OF A GLASS TUBE INCLUDING MEANS FOR POSITIONING THE MALLEABLE END OF SAID TUBE IN CONTACT WITH FORMING MEANS, FIRST FORMING MEANS FOR ENGAGING THE OUTER SURFACE OF A TUBE, SECOND FORMING MEANS FOR ENGAGING IN INNER SURFACE OF SAID TUBE, SAID FIRST AND SECOND FORMING MEANS DEFINING A WORKING ZONE OF FIXED DEMENSION FOR ENGAGING A PORTION OF THE TUBE THEREBETWEEN TO REDUCE SAID PORTION TO A CIRCUMFERENTIALLY UNIFORM RADIAL THICKNESS, AND RELIEF MEANS FORMING A PART OF SAID WORKING ZONE AND FORMED INTERMEDIATE END PORTIONS OF AT LEAST ONE OF SAID FORMING MEANS, WHEREBY THE PORTION OF SAID TUBE WITHIN SAID RELIEF ZONE IS DEFINED LONGITUDINALLY WHILE BEING FREE TO CIRCUMFERENTIALLY VARY IN RADIAL THICKNESS AS A RESULT OF NON-UNIFORMITIES IN THE TUBE WALL THICKNESS OF SAID GLASS TUBE PRIOR TO SHAPING.
Claim 2
Dependent Claim
142 words
IN AN APPARATUS FOR FORMING THE OPEN END OF A GLASS TUBE INCLUDING MEANS FOR POSITIONING THE MALLEABLE END OF SAID TUBE IN CONTACT WITH FORMING MEANS, FIRST FORMING MEANS FOR ENGAGING THE OUTER SURFACE OF A TUBE, SECOND FORMING MEANS FOR ENGAGING IN INNER SURFACE OF SAID TUBE, SAID FIRST AND SECOND FORMING MEANS DEFINING A WORKING ZONE OF FIXED DEMENSION FOR ENGAGING A PORTION OF THE TUBE THEREBETWEEN TO REDUCE SAID PORTION TO A CIRCUMFERENTIALLY UNIFORM RADIAL THICKNESS, AND RELIEF MEANS FORMING A PART OF SAID WORKING ZONE AND FORMED INTERMEDIATE END PORTIONS OF AT LEAST ONE OF SAID FORMING MEANS, WHEREBY THE PORTION OF SAID TUBE WITHIN SAID RELIEF ZONE IS DEFINED LONGITUDINALLY WHILE BEING FREE TO CIRCUMFERENTIALLY VARY IN RADIAL THICKNESS AS A RESULT OF NON-UNIFORMITIES IN THE TUBE WALL THICKNESS OF SAID GLASS TUBE PRIOR TO SHAPING.
Claim 3
Dependent Claim
97 words
AN IMPROVED METHOD OF FORMING THE OPEN END OF A GLASS TUBE HAVING NON-UNIFORM WALL THICKNESSES TO PROVIDE A SHAPED CIRCUMFERENTIALLY-CONSTANT WALL THICKNESS WHICH COMPRISES, ROTATING A SOFTENED TUBE TO BE FINISHED ABOUT ITS LONGITUNDINAL AXIS, CONTINUOUSLY ROTATING AN END PORTION OF SAID ROTATING TUBE THROUGH A CONFINED WORK ZONE OF FIXED LIMITS TO REDUCE SAID END PORTION TO A CIRCUMFERENTIALLY UNIFORM RADIAL THICKNESS, AND FLOWING EXCESS GLASS RADIALLY INTO A RELIEF ZONE COMMUNICATING WITH SAID CONFINED ZONE TO COMPENSATE FOR NON-UNIFORM WALL THICKNESSES PRESENT IN THE TUBE PRIOR TO SHAPING WHILE MAINTAINING A DESIRED LONGITUNDINAL DIMENSION.
Claim 4
Dependent Claim
97 words
AN IMPROVED METHOD OF FORMING THE OPEN END OF A GLASS TUBE HAVING NON-UNIFORM WALL THICKNESSES TO PROVIDE A SHAPED CIRCUMFERENTIALLY-CONSTANT WALL THICKNESS WHICH COMPRISES, ROTATING A SOFTENED TUBE TO BE FINISHED ABOUT ITS LONGITUNDINAL AXIS, CONTINUOUSLY ROTATING AN END PORTION OF SAID ROTATING TUBE THROUGH A CONFINED WORK ZONE OF FIXED LIMITS TO REDUCE SAID END PORTION TO A CIRCUMFERENTIALLY UNIFORM RADIAL THICKNESS, AND FLOWING EXCESS GLASS RADIALLY INTO A RELIEF ZONE COMMUNICATING WITH SAID CONFINED ZONE TO COMPENSATE FOR NON-UNIFORM WALL THICKNESSES PRESENT IN THE TUBE PRIOR TO SHAPING WHILE MAINTAINING A DESIRED LONGITUNDINAL DIMENSION.
References Cited (Backward Citations)
US668223A
Cited
US3202495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |