US4622002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container molding apparatus
Assignee: Hoechst AG
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Filing: 1984-07-23
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Granted: 1986-11-11
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Expires: 2004-07-23
Abstract
Abstract A thin-walled, injection-molded plastic container having a thickened sealing rim acquires a particularly smooth sealing rim, onto which a covering film can be sealed in a bacteria-tight, gas-tight and liquid-tight manner, if the gate is located on the sealing rim instead of on the bottom of the container.
Inventors
- 👤 Horst Bormuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:14
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
Apparatus for injection molding a thin-walled plastic container, the container having an inner shape and an outer shape, a bottom wall, a side wall and a smooth, thickened flat sealing rim outwardly of the side wall for sealing the rim of the container with a covering sheet, the apparatus comprising two symmetrical mold halves that engage one another along a mold parting plane, each mold half having a recess corresponding to one half of the outer shape of the thin-walled plastic container to be manufactured, a core within the mold halves corresponding to the inner shape of the container, the core being spaced from the mold halves to produce a container having side and bottom wall thicknesses in the range of 0.25 to 0.75 mm, the core having a longitudinal axis in the mold parting plane and a runner arranged in one of the two mold halves terminating in a part of the mold cavity in which the sealing rim of the container is formed whereby a gate mark is formed by the runner on a outside surface of the sealing rim.
Claim 2
Dependent Claim
182 words
Apparatus for injection molding a thin-walled plastic container, the container having an inner shape and an outer shape, a bottom wall, a side wall and a smooth, thickened flat sealing rim outwardly of the side wall for sealing the rim of the container with a covering sheet, the apparatus comprising two symmetrical mold halves that engage one another along a mold parting plane, each mold half having a recess corresponding to one half of the outer shape of the thin-walled plastic container to be manufactured, a core within the mold halves corresponding to the inner shape of the container, the core being spaced from the mold halves to produce a container having side and bottom wall thicknesses in the range of 0.25 to 0.75 mm, the core having a longitudinal axis in the mold parting plane and a runner arranged in one of the two mold halves terminating in a part of the mold cavity in which the sealing rim of the container is formed whereby a gate mark is formed by the runner on a outside surface of the sealing rim.
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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) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |