US4209160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Articulated mold for objects having undercut parts
Assignee: Compagnie Generale des Etablissements Michelin SCA
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Filing: 1978-11-20
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Granted: 1980-06-24
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Expires: 1998-11-20
Abstract
Abstract Articulated mold for the manufacture of molded objects having opposed undercut parts comprises two dies whose parting surface passes between the opposed undercut parts of the molded object. In each die there are provided shells composed of segments which can be displaced by pushers in order to open the mold and eject the molded object.
Inventors
- 👤 Gerard Vanotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:13
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0003; B29C37/0014; B29C45/00; B29C45/17; B29C45/26; B29C45/33; B29C45/40; B29C45/44; Y; Y10; Y10S; Y10S425/00; Y10S425/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
Articulated mold for the manufacture of molded objects having opposed undercut parts, comprising two dies whose parting surface passes between the opposed undercut parts of the molded object, these two dies being movable perpendicularly with respect to each other, and several groups of shells composed of segments arranged within said dies and capable of moving about guide members under the action of pushers, characterized by a single drive piece outside said dies and movable in the same direction as the dies, driving said pushers along, the pushers being so arranged with the guide members that the movements of said shells succeed each other when the single drive piece actuates the opening of the mold by the steps of freeing the space located between the opposed undercut parts, and then freeing each of said undercut parts, and finally ejecting the molded object, whereas the reverse movements occur upon closing of the mold.
Claim 2
Dependent Claim
151 words
Articulated mold for the manufacture of molded objects having opposed undercut parts, comprising two dies whose parting surface passes between the opposed undercut parts of the molded object, these two dies being movable perpendicularly with respect to each other, and several groups of shells composed of segments arranged within said dies and capable of moving about guide members under the action of pushers, characterized by a single drive piece outside said dies and movable in the same direction as the dies, driving said pushers along, the pushers being so arranged with the guide members that the movements of said shells succeed each other when the single drive piece actuates the opening of the mold by the steps of freeing the space located between the opposed undercut parts, and then freeing each of said undercut parts, and finally ejecting the molded object, whereas the reverse movements occur upon closing of the mold.
Claim 3
Dependent Claim
20 words
Articulated mold according to claim 1, characterized by the fact that the parting surface of the two dies is flat.
Claim 4
Dependent Claim
28 words
Articulated mold according to claim 1 or 2, characterized by the fact that the drive piece is a plate parallel to the parting surface of the two dies.
Claim 5
Dependent Claim
36 words
Articulated mold according to claim 1, characterized by the fact that the guide members are fingers integral with the shells or the dies, respectively, and sliding in boreholes drilled in the dies or the shells, respectively.
Claim 6
Dependent Claim
26 words
Articulated mold according to claim 1, characterized by the fact that the guide members are pins integral with the dies around which pins the shells pivot.
Claim 7
Dependent Claim
27 words
Articulated mold according to claim 1, characterized by the fact that the shells of at least one die are pushed towards the parting surface by elastic means.
Claim 8
Dependent Claim
25 words
Articulated mold according to claim 6, characterized by the fact that the elastic means are springs which are compressed by the closing of the mold.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |