US3915301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Covered tubular package of glass roving and method of making
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1973-07-02
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Granted: 1975-10-28
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Expires: 1993-07-02
Abstract
Abstract A package of continuous glass filaments coiled into a generally cylindrical tubular shape is provided with a heat shrunk plastic film covering the peripheral and end surfaces of the tubular package. The heat shrunk plastic film protects the filaments from abrasion during shipment and handling. The heat shrunk film also co-operates with the outer layer of the package to support the coils in the outer layer as the filaments are withdrawn from the package thereby preventing the coils from slumping together and becoming entangled. The plastic covering is provided with an opening at one end thereof which acts as a guide for the filaments as they are withdrawn from the package.
Inventors
- 👤 Richard A Gray
- 👤 Allan B Isham
- 👤 John A Rolston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/002; B65B; B65B53/00; B65B53/02; B65H; B65H49/00; B65H49/02; B65H49/04; B65H49/06; B65H49/08; B65H55/00; B65H2701/00; B65H2701/30; B65H2701/31; B65H2701/312
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
258 words
A cover tubular package of glass roving from the interior of which roving can be completely withdrawn without interruption, comprising a roving of glass filaments, the roving being wound in successive annular layers of equal axial length to form a cylindrical tube having a pair of generally flat, annular, opposite end surfaces, and a tubular covering longer than the tube of roving, open at one end, and formed of heat-shrinkable resinous film, the tube of roving being disposed endwise in the tubular covering, a first generally cylindrical portion of the covering being shrunk by heat into a tubular sleeve in intimate contact with an outer layer of the roving, a second generally cylindrical open end portion of the covering being shrunk by heat into a flat, annular, wrinkle-free, taut end portion in contact with the adjacent end surface of the tube of roving and having a smooth, generally circular opening substantially concentric with the tube of roving and of smaller diameter than an inner diameter of the tube, an inner peripheral portion of the flat, annular end portion defining the opening forming a generally planar guiding means for guiding the roving radially inwardly of the tube as the roving is withdrawn from the heat-shrunk covering through the opening, and the heat-shrunk tubular sleeve and the outer layer of the roving forming a structure sufficiently self-supporting, after withdrawal of the inner layers of the roving through the opening, to permit complete withdrawal of the roving of the outer layer through the opening from within the heat-shrunk covering without interruption.
Claim 2
Dependent Claim
258 words
A cover tubular package of glass roving from the interior of which roving can be completely withdrawn without interruption, comprising a roving of glass filaments, the roving being wound in successive annular layers of equal axial length to form a cylindrical tube having a pair of generally flat, annular, opposite end surfaces, and a tubular covering longer than the tube of roving, open at one end, and formed of heat-shrinkable resinous film, the tube of roving being disposed endwise in the tubular covering, a first generally cylindrical portion of the covering being shrunk by heat into a tubular sleeve in intimate contact with an outer layer of the roving, a second generally cylindrical open end portion of the covering being shrunk by heat into a flat, annular, wrinkle-free, taut end portion in contact with the adjacent end surface of the tube of roving and having a smooth, generally circular opening substantially concentric with the tube of roving and of smaller diameter than an inner diameter of the tube, an inner peripheral portion of the flat, annular end portion defining the opening forming a generally planar guiding means for guiding the roving radially inwardly of the tube as the roving is withdrawn from the heat-shrunk covering through the opening, and the heat-shrunk tubular sleeve and the outer layer of the roving forming a structure sufficiently self-supporting, after withdrawal of the inner layers of the roving through the opening, to permit complete withdrawal of the roving of the outer layer through the opening from within the heat-shrunk covering without interruption.
Claim 3
Dependent Claim
28 words
A package as claimed in claim 1, wherein the heat-shrunk covering is thicker and more rigid around the opening in the end portion than in the tubular sleeve.
Claim 4
Independent Claim
214 words
A method of making a covered tubular package of glass roving from the interior of which roving can be completely withdrawn without interruption, comprising providing a roving of glass filaments, winding the roving in successive annular layers of equal axial length to form a cylindrical tube having a pair of generally flat, annular, opposite end surfaces, providing a tubular covering longeR than the tube of roving, open at one end, and formed of heat-shrinkable resinous film, inserting the tube of roving endwise into the tubular covering through the one open end thereof, shrinking a first generally cylindrical portion of the covering by heat into a tubular sleeve in intimate contact with an outer layer of the roving thereby forming a structure sufficiently self-supporting, after withdrawal of the inner layers of the roving, to permit complete withdrawal of the outer layer of the roving without interruption, and shrinking a second generally cylindrical open end portion of the covering by heat into a flat, annular, wrinkle-free, taut end portion in contact with the adjacent end surface of the tube of roving and having a smooth, generally circular opening through which the roving may be withdrawn, the opening being substantially concentric with the tube of roving and of smaller diameter than an inner diameter of the tube.
Claim 5
Independent Claim
214 words
A method of making a covered tubular package of glass roving from the interior of which roving can be completely withdrawn without interruption, comprising providing a roving of glass filaments, winding the roving in successive annular layers of equal axial length to form a cylindrical tube having a pair of generally flat, annular, opposite end surfaces, providing a tubular covering longeR than the tube of roving, open at one end, and formed of heat-shrinkable resinous film, inserting the tube of roving endwise into the tubular covering through the one open end thereof, shrinking a first generally cylindrical portion of the covering by heat into a tubular sleeve in intimate contact with an outer layer of the roving thereby forming a structure sufficiently self-supporting, after withdrawal of the inner layers of the roving, to permit complete withdrawal of the outer layer of the roving without interruption, and shrinking a second generally cylindrical open end portion of the covering by heat into a flat, annular, wrinkle-free, taut end portion in contact with the adjacent end surface of the tube of roving and having a smooth, generally circular opening through which the roving may be withdrawn, the opening being substantially concentric with the tube of roving and of smaller diameter than an inner diameter of the tube.
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |