US3701455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Can for liquids and process for closing same
Assignee: TUWA-PLASTIK DR HERBERT WARNECKE ERZEUGUNG VON KUNSTSTOFFARTIKELN
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Filing: 1970-10-12
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Granted: 1972-10-31
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Expires: 1990-10-12
Abstract
Abstract The can of the invention is intended for containing liquids, such as oils, is made of a plastic material, and is substantially circular in cross-section. The top end wall is provided with a central opening having a reinforced rim and is adapted to be closed with a heat sealing foil. An elevated border at the outer circumference of the top end wall concentrically surrounds the rim and is connected with said rim by a wall portion having the shape of a flat cone.
Inventors
- 👤 Herbert Warnecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:12
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/12; B65D1/14; B65D1/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
A can for a liquid medium, particularly lubricating oil, comprising a. a substantially cylindrical body portion of a thermoplastic material selected from the group consisting of polyethylene and polypropylene and having a wall thickness of 0.0039 to 0.0197 inches, b. a bottom member of the same material as and integral with said body portion at one end thereof, c. a top member of the same material as and integral with said body portion at the opposite end thereof from said bottom member and provided with a central opening of a diameter substantially less than the diameter of said body portion, d. a reinforcement rim forming part of said top member along the free edge at said central opening and susceptible to being heat sealed to a foil covering said opening, and e. an annular portion of said top member surrounding said central opening comprising an inner annular section extending outwardly and downwardly from said reinforcement rim and merging wiTh an outer annular section which is inclined outwardly and upwardly toward the top of said cylindrical body portion.
Claim 2
Dependent Claim
177 words
A can for a liquid medium, particularly lubricating oil, comprising a. a substantially cylindrical body portion of a thermoplastic material selected from the group consisting of polyethylene and polypropylene and having a wall thickness of 0.0039 to 0.0197 inches, b. a bottom member of the same material as and integral with said body portion at one end thereof, c. a top member of the same material as and integral with said body portion at the opposite end thereof from said bottom member and provided with a central opening of a diameter substantially less than the diameter of said body portion, d. a reinforcement rim forming part of said top member along the free edge at said central opening and susceptible to being heat sealed to a foil covering said opening, and e. an annular portion of said top member surrounding said central opening comprising an inner annular section extending outwardly and downwardly from said reinforcement rim and merging wiTh an outer annular section which is inclined outwardly and upwardly toward the top of said cylindrical body portion.
Claim 3
Dependent Claim
20 words
The can according to claim 1, in which the wall thickness of said cylindrical body portion is about 0.01378 inches.
Claim 4
Dependent Claim
200 words
A can for a liquid medium, particularly lubricating oil, comprising a. a substantially cylindrical body portion of a thermoplastic material selected from the group consisting of polyethylene and polypropylene and having a wall thickness of 0.0039 to 0.0197 inches, b. a bottom member of the same material as and integral with said body portion at one end thereof, c. a top member of the same material as and integral with said body portion at the opposite end thereof from said bottom member and provided with a central opening of a diameter substantially less than the diameter of said body portion, d. a reinforcement rim forming part of said top member along the free edge at said central opening and susceptible to being heat sealed to a foil covering said opening, and e. an annular portion of said top member surrounding said central opening comprising an inner annular section extending outwardly and downwardly from said reinforcement rim and merging with an outer annular section which is inclined outwardly and upwardly toward the top of said cylindrical body portion, the wall thickness of said inner annular section of the top member being greater than the wall thickness of said cylindrical body portion.
Claim 5
Dependent Claim
200 words
A can for a liquid medium, particularly lubricating oil, comprising a. a substantially cylindrical body portion of a thermoplastic material selected from the group consisting of polyethylene and polypropylene and having a wall thickness of 0.0039 to 0.0197 inches, b. a bottom member of the same material as and integral with said body portion at one end thereof, c. a top member of the same material as and integral with said body portion at the opposite end thereof from said bottom member and provided with a central opening of a diameter substantially less than the diameter of said body portion, d. a reinforcement rim forming part of said top member along the free edge at said central opening and susceptible to being heat sealed to a foil covering said opening, and e. an annular portion of said top member surrounding said central opening comprising an inner annular section extending outwardly and downwardly from said reinforcement rim and merging with an outer annular section which is inclined outwardly and upwardly toward the top of said cylindrical body portion, the wall thickness of said inner annular section of the top member being greater than the wall thickness of said cylindrical body portion.
Claim 6
Dependent Claim
23 words
The can according to claim 3, in which the wall thickness of said inner annular section decreases gradually outwardly from said reinforcement rim.
Claim 7
Dependent Claim
42 words
The can according to claim 3, in which the juncture between said outer annular section of the top member and the top of said cylindrical body portion is in the shape of an upwardly convex annular bead of substantially semi-circular radial cross-section.
Claim 8
Dependent Claim
20 words
The can according to claim 3, in which the wall thickness of said cylindrical body portion is about 0.01378 inches.
Claim 9
Dependent Claim
34 words
The can according to claim 3, in which said inner annular section includes a middle concentric region in which the wall thickness is at least twice the wall thickness of said cylindrical body portion.
Claim 10
Dependent Claim
27 words
The can according to claim 7, in which the thickness of said middle concentric region is about three times the wall thickness of said cylindrical body portion.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |