Patent US3104425A successfully refreshed from Google Patents.
US3104425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding apparatus for forming an undercut
Assignee: Foster Grant Co Inc
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Filing: 1961-03-02
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Granted: 1963-09-24
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Expires: 1981-03-02
Abstract
No abstract record available.
Inventors
- 👤 James E Crane
- 👤 Edgar J Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:07
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/40; B29C45/44; B29D; B29D12/00; B29D12/02; Y; Y10; Y10S; Y10S425/00; Y10S425/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
MOLDING APPARATUS FOR FORMING AN UNDERCUT PORTION IN A MOLDED ARTICLE COMPRISING AN INJECTION MOLD CAVITY BLOCK AND AN EJECTION CAVITY BLOCK, SAID BLOCKS HAVING MATING MOLD CAVITY PORTIONS ADAPTED TO FORM A MOLD CAVITY, A HIGHLY RESILIENT MEMBER HAVING A RIM PORTION PARTIALLY PROJECTING INTO SAID MOLD CAVITY, SECURING MEANS POSITIONED OVER AND IN CONTACT WITH SAID HIGHLY RESILIENT MEMBER INTERMEDIATE OF ITS RIM PORTION AND EXTERNAL OF SAID MOLD CAVITY FOR SECURING SAID HIGHLY RESILIENT MEMBER TO A BASE MEMBER SLIDEABLY MOUNTED IN A BORED PORTION OF SAID EJECTION MOLD CAVITY BLOCK, MEANS INTEGRAL WITH SAID INJECTION MOLD CAVITY BLOCK FOR MAINTAINING SAID RIM PORTION OF SAID HIGHLY RESILIENT MEMBER IN NONDEFORMED CONDITION WHEN SAID CAVITY BLOCKS ARE IN CLOSED, MOLDING POSITION, MEANS FOR REMOVING A MOLDED ARTICLE HAVING AN UNDERCUT PORTION FORMED IN SAID MOLD CAVITY FROM SAID MOLD CAVITY TOGETHER WITH SAID HIGHLY RESILIENT MEMBER IN CONTACT WITH SAID UNDERCUT PORTION, MEANS FOR PARTIALLY STRIPPING SAID MOLDED ARTICLE FROM SAID HIGHLY RESILIENT MEMBER WHILE RESILIENTLY DEFORMING SAID MOLDED ARTICLE AND SAID HIGHLY RESILIENT MEMBER, AND MEANS FOR COMPLETING STRIPPING OF SAID MOLDED ARTICLE FROM SAID HIGHLY RESILIENT MEMBER.
Claim 2
Dependent Claim
192 words
MOLDING APPARATUS FOR FORMING AN UNDERCUT PORTION IN A MOLDED ARTICLE COMPRISING AN INJECTION MOLD CAVITY BLOCK AND AN EJECTION CAVITY BLOCK, SAID BLOCKS HAVING MATING MOLD CAVITY PORTIONS ADAPTED TO FORM A MOLD CAVITY, A HIGHLY RESILIENT MEMBER HAVING A RIM PORTION PARTIALLY PROJECTING INTO SAID MOLD CAVITY, SECURING MEANS POSITIONED OVER AND IN CONTACT WITH SAID HIGHLY RESILIENT MEMBER INTERMEDIATE OF ITS RIM PORTION AND EXTERNAL OF SAID MOLD CAVITY FOR SECURING SAID HIGHLY RESILIENT MEMBER TO A BASE MEMBER SLIDEABLY MOUNTED IN A BORED PORTION OF SAID EJECTION MOLD CAVITY BLOCK, MEANS INTEGRAL WITH SAID INJECTION MOLD CAVITY BLOCK FOR MAINTAINING SAID RIM PORTION OF SAID HIGHLY RESILIENT MEMBER IN NONDEFORMED CONDITION WHEN SAID CAVITY BLOCKS ARE IN CLOSED, MOLDING POSITION, MEANS FOR REMOVING A MOLDED ARTICLE HAVING AN UNDERCUT PORTION FORMED IN SAID MOLD CAVITY FROM SAID MOLD CAVITY TOGETHER WITH SAID HIGHLY RESILIENT MEMBER IN CONTACT WITH SAID UNDERCUT PORTION, MEANS FOR PARTIALLY STRIPPING SAID MOLDED ARTICLE FROM SAID HIGHLY RESILIENT MEMBER WHILE RESILIENTLY DEFORMING SAID MOLDED ARTICLE AND SAID HIGHLY RESILIENT MEMBER, AND MEANS FOR COMPLETING STRIPPING OF SAID MOLDED ARTICLE FROM SAID HIGHLY RESILIENT MEMBER.
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |