US4595434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible dispensing tube with an orifice sealed with multi-layer sealant sheet material
Assignee: Rexam Beverage Can Co
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Filing: 1983-09-15
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Granted: 1986-06-17
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Expires: 2003-09-15
Abstract
Abstract A collapsible dispensing tube has a multi-layer sheet material sealed over its dispensing orifice to provide a hermetically sealed tube. The multi-layer sealant sheet comprises two layers of metal foil separated by a polymer layer firmly adhered to the metal foil layers. A polymeric layer is adhered to the outer surface of one of the metal foil layers and serves to seal the tube orifice. The laminated sheet may be sealed across the orifice by the application of radio-frequency energy.
Inventors
- 👤 John P. Eckstein
- 👤 William S. Gillespie
- 👤 Suzanne E. Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:09
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/18; B65D51/20; B65D51/22; B65D51/221; B65D51/222; B65D51/223; B29; B29C; B29C65/00; B29C65/02; B29C65/34; B29C65/36; B29C65/3604; B29C65/3644; B29C65/3656; B29C65/3672; B29C65/3676; B29C65/368; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/118; B29C66/13; B29C66/131; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C66/53461; B29C66/54; B29C66/542; B29C66/63; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72321; B29C66/80; B65D35/00; B65D35/44; B29C66/71; B29C66/7234; B29C66/72341; B29C66/83; B29C66/832; B29C66/8322; B29L; B29L2009/00; B29L2009/003; B29L2023/00; B29L2023/20; B65D2251/00; B65D2251/0003; B65D2251/0006; B65D2251/0015; B65D2251/0068; B65D2251/0093
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A method of hermetically sealing a collapsible dispensing tube, wherein the tube includes a headpiece having a dispensing orifice therein and a body extending from said headpiece, said method comprising placing said tube over a working mandrel, placing a generally cylindrical ferrite material in the neck portion of said headpiece in spaced relation to the interior of said neck portion and said orifice, placing a multiple layer sheet material across said dispensing orifice and apply radio frequency energy thereto to hermetically seal said orifice, said multiple layer sheet material comprising first and second layers of metal foil and a third layer of a polymer disposed between said first and second layers and firmly adhered thereto, and a fourth layer of polymer outside the composite structure of said first, second and third layers, and firmly adhered to said first layer, said fourth layer comprising said first outer surface layer of said sheet material and being the functional means of keeping said sheet material adhered to said headpiece.
Claim 2
Independent Claim
166 words
A method of hermetically sealing a collapsible dispensing tube, wherein the tube includes a headpiece having a dispensing orifice therein and a body extending from said headpiece, said method comprising placing said tube over a working mandrel, placing a generally cylindrical ferrite material in the neck portion of said headpiece in spaced relation to the interior of said neck portion and said orifice, placing a multiple layer sheet material across said dispensing orifice and apply radio frequency energy thereto to hermetically seal said orifice, said multiple layer sheet material comprising first and second layers of metal foil and a third layer of a polymer disposed between said first and second layers and firmly adhered thereto, and a fourth layer of polymer outside the composite structure of said first, second and third layers, and firmly adhered to said first layer, said fourth layer comprising said first outer surface layer of said sheet material and being the functional means of keeping said sheet material adhered to said headpiece.
Claim 3
Dependent Claim
38 words
A method as in claim 1 wherein said sheet material includes a fifth layer, of polymer, on the outer surface of said fourth layer, said fifth layer serving as said first outer surface layer of said sheet material.
Claim 4
Dependent Claim
19 words
A method as in claim 2 wherein additional polymer layers are disposed between said first and second foil layers.
Claim 5
Dependent Claim
19 words
A method as in claim 1 wherein additional polymer layers are disposed between said first and second foil layers.
References Cited (Backward Citations)
FR901376A
Cited
US2592806A
Cited
US2671577A
Cited
US2976224A
Cited
US2982457A
Cited
US3791906A
Cited
US4442129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |