US3613876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticlockspring device and method
Assignee: Eastman Kodak Co
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Filing: 1969-11-24
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Granted: 1971-10-19
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Expires: 1989-11-24
Abstract
Abstract In a film cartridge having a core support hub extending through the film core, preventing clock-springing of a roll of film therein providing one or more spotwelds between the surface of the core and the end of the hub which has sufficient strength to prevent the core from rotating during shipping but which will break as the film is withdrawn from the cartridge, permitting the core to rotate. The spotwelds may be formed ultrasonically or by a solvent or adhesive. An alternate embodiment utilizes a paper paster which is glued across the core and the hub and which is torn by the withdrawal of film from the cartridge permitting the core to rotate.
Inventors
- 👤 John C Kohler
- 👤 Robert C Sutliff
- 👤 Corrado Zollo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:15
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30; G03B17/305; G03B19/00; G03B19/02; G03B19/04; Y; Y10; Y10S; Y10S220/00; Y10S220/31
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
Means for preventing clockspringing of a wound roll of web material within a cartridge during storage and shipment, said roll of web material including a central core, said core arranged to rotate with said roll of material within said cartridge, said cartridge having at least one wall member disposed substantially contiguous to the edge of said roll, said clockspring prevention means comprising means for frangibly connecting said core to said cartridge wall member, said frangible connection arranged to break when said roll is rotated by a tensile force on the outer end of the web material whereby said roll is freely rotatable in said cartridge after the frangible connection is broken.
Claim 2
Dependent Claim
111 words
Means for preventing clockspringing of a wound roll of web material within a cartridge during storage and shipment, said roll of web material including a central core, said core arranged to rotate with said roll of material within said cartridge, said cartridge having at least one wall member disposed substantially contiguous to the edge of said roll, said clockspring prevention means comprising means for frangibly connecting said core to said cartridge wall member, said frangible connection arranged to break when said roll is rotated by a tensile force on the outer end of the web material whereby said roll is freely rotatable in said cartridge after the frangible connection is broken.
Claim 3
Dependent Claim
50 words
The invention according to claim 1 wherein said frangible connection means is a portion of the cartridge wall adjacent the core which is softened and adhered to the core at a plurality of small areas which are broken by a relatively small tensile force on the end of the web.
Claim 4
Dependent Claim
16 words
The invention according to claim 2 wherein said cartridge wall is ultrasonically welded to said core.
Claim 5
Dependent Claim
48 words
The invention according to claim 1 wherein said frangible connection means is an adhesive bearing frangible tape which connects the core to a portion of the cartridge, said tape being arranged to break between the core and the cartridge upon a pull on the end of the web.
Claim 6
Dependent Claim
41 words
The invention according to claim 4 wherein said cartridge has a core supporting hub extending through said core with said core being rotatable on said hub, said adhesive bearing tape arranged to connect said core to the end of said hub.
Claim 7
Independent Claim
70 words
A method of preventing clockspringing of a roll of film having a central core in a cartridge having a wall member comprising the steps of deflecting the cartridge wall into contact with the roll core, applying a probe to the outer surface of the cartridge wall adjacent the core in contact therewith, and ultrasonically vibrating the probe to frangibly weld the core to the inner wall surface of the cartridge.
Claim 8
Independent Claim
70 words
A method of preventing clockspringing of a roll of film having a central core in a cartridge having a wall member comprising the steps of deflecting the cartridge wall into contact with the roll core, applying a probe to the outer surface of the cartridge wall adjacent the core in contact therewith, and ultrasonically vibrating the probe to frangibly weld the core to the inner wall surface of the cartridge.
Claim 9
Dependent Claim
21 words
The invention according to claim 6 wherein said cartridge wall is deflected into contact with the roll core by said probe.
References Cited (Backward Citations)
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Cited
US3069105A
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US2864493A
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US2953313A
Cited
US3144936A
Cited
US3389872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |