Patent US4035461A successfully refreshed from Google Patents.
US4035461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an extravertable-wall container
Assignee: Mannesmann Demag Krauss Maffei GmbH
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Filing: 1975-02-11
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Granted: 1977-07-12
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Expires: 1995-02-11
Abstract
Abstract An extravertable-wall container is formed by extruding a parison into a blow-mold cavity having a pair of oppositely diverging halves which are joined at their widest portions, one half being slightly smaller than the other so that the frusto-conical wall of the container formed in this half can be pushed (compressed) into the other half to produce a stackable cup-shaped structure. When the container is to be filled, the inner wall portion is extraverted to form an extension of the container, e.g. the bottom. The container may have a frustoconical upwardly widening base which is geometrically smaller but inverted with respect to the larger frustoconical head. A neck or filling opening may be provided on this head.
Inventors
- 👤 Herbert Korth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:06
CPC Classifications
B; B65; B65D; B65D21/00; B65D21/02; B65D21/0233; B29; B29C; B29C49/00; B29C49/0031; B29C49/02; B29C49/06; B29C49/42; B29C49/48; B29C49/54; B29C49/541; B29C67/00; B29C69/00; B29C69/02; B29C69/025; B65D1/00; B65D1/02; B65D1/0223; B65D1/0292; B65D1/22; B65D1/26; B65D1/265; B29C2049/023; B29C2049/4856; B29C2049/4858; B29C2049/542; B29C2049/548; B29C49/04; B29C49/0665; B29C49/4273; B29C49/4283
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
263 words
A method of making a container comprising the steps of: enclosing a blowing mandrel in a blow mold having a first half surrounding said mandrel at a location spaced from an end thereof and defining a cup-shaped cavity widening away from said location, said mold having a second half formed with a cup-shaped cavity geometrically similar to the cup-shaped cavity of said first half and widening in the direction thereof, said cup-shaped cavities adjoining to produce a molding cavity having the configuration of a container to be formed; advancing an injection nozzle through said second half to surround said mandrel and define an elongated injection cavity therewith; injecting a thermoplastic synthetic-resin material into said injection cavity through said nozzle to form a closed end parison around said mandrel; withdrawing said nozzle from said molding cavity through a wall of said second half and closing said wall; blowing said parison through said mandrel to expand said parison against the walls of said molding cavity, thereby forming a container conforming to the configuration of said molding cavity and having a first cup portion lying in the cup-shaped cavity of said first half and a second cup portion lying in the cup-shaped cavity of said second half; separating said first and second halves of said mold to release said container from said molding cavity; and axially displacing said first cup portion toward said nozzle and advancing said nozzle toward said mandrel to entrain the bottom of said second cup portion into said first cup portion and introvert said second cup portion within said first cup portion.
Claim 2
Independent Claim
263 words
A method of making a container comprising the steps of: enclosing a blowing mandrel in a blow mold having a first half surrounding said mandrel at a location spaced from an end thereof and defining a cup-shaped cavity widening away from said location, said mold having a second half formed with a cup-shaped cavity geometrically similar to the cup-shaped cavity of said first half and widening in the direction thereof, said cup-shaped cavities adjoining to produce a molding cavity having the configuration of a container to be formed; advancing an injection nozzle through said second half to surround said mandrel and define an elongated injection cavity therewith; injecting a thermoplastic synthetic-resin material into said injection cavity through said nozzle to form a closed end parison around said mandrel; withdrawing said nozzle from said molding cavity through a wall of said second half and closing said wall; blowing said parison through said mandrel to expand said parison against the walls of said molding cavity, thereby forming a container conforming to the configuration of said molding cavity and having a first cup portion lying in the cup-shaped cavity of said first half and a second cup portion lying in the cup-shaped cavity of said second half; separating said first and second halves of said mold to release said container from said molding cavity; and axially displacing said first cup portion toward said nozzle and advancing said nozzle toward said mandrel to entrain the bottom of said second cup portion into said first cup portion and introvert said second cup portion within said first cup portion.
Claim 3
Dependent Claim
32 words
The method defined in claim 1, further comprising the steps of molding a neck on said parison around said mandrel during the injection of said thermoplastic synthetic-resin material into said injection cavity.
Claim 4
Dependent Claim
32 words
The method defined in claim 1, further comprising the step of introducing a liquid filling material into said container to displace outwardly the introverted second cup portion during filling of the container.
References Cited (Backward Citations)
US2208744A
Cited
FR1046602A
Cited
GB896890A
Cited
GB1001672A
Cited
GB969392A
Cited
US3252625A
Cited
US3819789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |