Patent US5225125A successfully refreshed from Google Patents.
US5225125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and sealing material for producing the lid gasket of synthetic resin lids for blow-molded synthetic resin barrels
Assignee: Schutz Werke GmbH and Co KG
•
Filing: 1992-03-16
•
Granted: 1993-07-06
•
Expires: 2012-03-16
Abstract
Abstract A lid (1) is injection-molded of polyethylene, for a widemouthed barrel of a synthetic resin, and includes an outer rim (4) encompassing the barrel neck (3) and an inner rim (5) dipping into the barrel neck. The outer lid rim (4) and inner lid rim (5) form an annular space (7), an annular web (8) projecting axially from the base of this space. For producing the lid gasket (13), the annular space (7) is exposed to an open flame for activating the annular space surface. Subsequently the sealing material, preferably polyurethane, is injected from a foaming machine into the base of the annular space (7), and thereafter the lid (1) is vibrated in order to degasify the gasket (13). The sealing material, preferably consisting of foamed polyurethane, contains a parting compound having a long-term effect.
Inventors
- 👤 Eberhard Wildfeuer
- 👤 Thomas Erll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:42
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B65; B65D; B65D45/00; B65D45/32; B65D43/00; B65D43/02; B65D43/0202; B65D43/0214; B65D43/0218; B65D2543/00; B65D2543/00009; B65D2543/00018; B65D2543/00064; B65D2543/00074; B65D2543/00092; B65D2543/00259; B65D2543/00296; B65D2543/00444; B65D2543/00481; B65D2543/0049; B65D2543/005; B65D2543/00537; B65D2543/00555; B65D2543/00564; B65D2543/00953; B65D2543/00962; B65D2543/00972; B65D2543/0099
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
In a process for producing a lid gasket of synthetic resin lids for blow-molded synthetic resin barrels, with an outer lid rim encompassing a barrel neck and with an inner lid rim dipping into the barrel neck and projecting beyond a barrel opening, as well as with an annular web molded to the base of an annular space between the outer lid rim and the inner lid rim, said web being surrounded by a molded-on sealing material comprised of foamed synthetic resin; the improvement comprising exposing the annular space (7) receiving the gasket (13) to an open flame on the inside of the lid (1), which is injection-molded from a synthetic resin, in order to activate a surface (15) of the annular space and enhance bonding between the gasket and the surface, subsequently injecting the synthetic resin sealing material (9) from a foaming machine into the annular space (7) to form the gasket, and thereafter vibrating the lid (1) in order to degasify the gasket (13).
Claim 2
Dependent Claim
166 words
In a process for producing a lid gasket of synthetic resin lids for blow-molded synthetic resin barrels, with an outer lid rim encompassing a barrel neck and with an inner lid rim dipping into the barrel neck and projecting beyond a barrel opening, as well as with an annular web molded to the base of an annular space between the outer lid rim and the inner lid rim, said web being surrounded by a molded-on sealing material comprised of foamed synthetic resin; the improvement comprising exposing the annular space (7) receiving the gasket (13) to an open flame on the inside of the lid (1), which is injection-molded from a synthetic resin, in order to activate a surface (15) of the annular space and enhance bonding between the gasket and the surface, subsequently injecting the synthetic resin sealing material (9) from a foaming machine into the annular space (7) to form the gasket, and thereafter vibrating the lid (1) in order to degasify the gasket (13).
References Cited (Backward Citations)
US2566596A
Cited
US3052926A
Cited
DE1247605B
Cited
US3557030A
Cited
DE1704927A1
Cited
US4060439A
Cited
US4130213A
Cited
SU592599A2
Cited
FR2411692A1
Cited
US4324601A
Cited
DE3132949A1
Cited
DE3149020A1
Cited
US4473673A
Cited
US4567106A
Cited
JPS6163442A
Cited
US4756857A
Cited
US4988467A
Cited
DE9011590U1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |