US3791545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture-proof seal for containers
Assignee: YURIN TOKUSHU KOGYO CO Ltd
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Filing: 1971-10-05
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Granted: 1974-02-12
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Expires: 1991-10-05
Abstract
Abstract By first applying, either to the entire top peripheral surface of the mouth of a container or to the under-side of its cap member, a packing material having the properties that it will not undergo plastic deformation when subjected to a compression force of the order of 1 kg/cm2 but will exhibit plastic flow when subjected to a compression force of about 2 kg/cm2 or more and that it exhibits adhesiveness, air-tightness, water-proofness, non-toxicity and resistance to chemicals at normal temperature, and thereafter applying a pressure of about 2 kg/cm2 or more to said packing material through the cap member, an ideal moistureproof sealing which also permits the contents to be held under reduced pressure in the container is obtained for such contents as will be liable to being spoiled upon their exposure to heat and/or moisture.
Inventors
- 👤 J Kawasaki
- 👤 S Narusawa
- 👤 N Iizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:42
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/14; B65D51/145; B65D53/00; B65D53/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
192 words
A seal for the opening in a bottle and like containers for protecting the contents from ambient moisture and/or preserving the contents under reduced pressure conditions, comprising a cap member for covering the opening in the container, a packing material disposed between the surface of the opening in the container and the cap member, said packing material being formed of a plastic material which exhibits adhesive characteristics at normal temperatures and which undergoes plastic flow when subjected to a compression force of about 2 kg/cm2 and does not undergo plastic flow when subjected to a compression force of about 1 kg/cm2, said plastic material consisting of at least one of atactic polypropylene, atactic polyethylene, the mixed components of atactic polypropylene and polyethylene without the solvents used in the preparation of adhesives and a composition in which at least one of atactic polypropylene and atactic polyethylene is the principal component part, said packing material being waterproof, resistant to chemicals, non-toxic and air tight, said packing material having a thickness of about 0.1 mm and having an elongability in the range of 200 to 400%, and said cap member is a flat metal plate.
Claim 2
Dependent Claim
192 words
A seal for the opening in a bottle and like containers for protecting the contents from ambient moisture and/or preserving the contents under reduced pressure conditions, comprising a cap member for covering the opening in the container, a packing material disposed between the surface of the opening in the container and the cap member, said packing material being formed of a plastic material which exhibits adhesive characteristics at normal temperatures and which undergoes plastic flow when subjected to a compression force of about 2 kg/cm2 and does not undergo plastic flow when subjected to a compression force of about 1 kg/cm2, said plastic material consisting of at least one of atactic polypropylene, atactic polyethylene, the mixed components of atactic polypropylene and polyethylene without the solvents used in the preparation of adhesives and a composition in which at least one of atactic polypropylene and atactic polyethylene is the principal component part, said packing material being waterproof, resistant to chemicals, non-toxic and air tight, said packing material having a thickness of about 0.1 mm and having an elongability in the range of 200 to 400%, and said cap member is a flat metal plate.
Claim 3
Dependent Claim
43 words
A seal, as set forth in claim 1, wherein a ring-shaped member formed of aluminum extends about the circumferential periphery of said cap member and downwardly about the container from its open end for protecting said cap member and seal from possible impact.
Claim 4
Dependent Claim
278 words
A seal for the opening in a glass bottle and similar glass containers for protecting the contents from ambient moisture and/or preserving the content under reduced temperature conditions, comprising a flat disc-shaped metal cap member for completely covering the opening in the container so that it extends laterally outwardly from the opening, a disc-shaped packing material disposed between the said cap member and the surface of said container defining the opening therein for completely covering the opening in the container, said packing material being formed of a plastic material which exhibits adhesive characteristics at normal temperature and which undergoes plastic flow when subjected to a compression force of about 2 kg/cm2 and does not undergo plastic flow when subjected to a compression force of below 2 kg/cm2 so that the plastic flow of said packaging material fills any fine irregularities and undulations of said cap member and the surface of the container defining the opening to be closed, said plastic material consisting of at least one of atactic polypropylene, atactic polyethylene, the mixed components of atactic polypropylene and atactic polyethylene without the solvents used in the preparation of adhesives and a composition in which at least one of atactic polypropylene and atactic polyethylene is the principal component part, said packing material being waterproof, resistant to chemicals, non-toxiC and air tight, said packing material having a thickness of about 0.1 mm and an elongability in the range of 200 to 400 % and a ring-shaped member formed of aluminum and extending laterally about the circumferential periphery of said cap member and downwardly about the container from its open end for protecting said cap member and seal from possible impact.
Claim 5
Dependent Claim
278 words
A seal for the opening in a glass bottle and similar glass containers for protecting the contents from ambient moisture and/or preserving the content under reduced temperature conditions, comprising a flat disc-shaped metal cap member for completely covering the opening in the container so that it extends laterally outwardly from the opening, a disc-shaped packing material disposed between the said cap member and the surface of said container defining the opening therein for completely covering the opening in the container, said packing material being formed of a plastic material which exhibits adhesive characteristics at normal temperature and which undergoes plastic flow when subjected to a compression force of about 2 kg/cm2 and does not undergo plastic flow when subjected to a compression force of below 2 kg/cm2 so that the plastic flow of said packaging material fills any fine irregularities and undulations of said cap member and the surface of the container defining the opening to be closed, said plastic material consisting of at least one of atactic polypropylene, atactic polyethylene, the mixed components of atactic polypropylene and atactic polyethylene without the solvents used in the preparation of adhesives and a composition in which at least one of atactic polypropylene and atactic polyethylene is the principal component part, said packing material being waterproof, resistant to chemicals, non-toxiC and air tight, said packing material having a thickness of about 0.1 mm and an elongability in the range of 200 to 400 % and a ring-shaped member formed of aluminum and extending laterally about the circumferential periphery of said cap member and downwardly about the container from its open end for protecting said cap member and seal from possible impact.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |