US3293345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the ejection of molded plastic parts from hot molds
Assignee: Dynamit Nobel AG
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Filing: 1962-09-05
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Granted: 1966-12-20
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Expires: 1982-09-05
Abstract
No abstract record available.
Inventors
- 👤 Zebrowski Willy
- 👤 Behr Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:09
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
IN THE PRODUCTION OF PLASTIC ARTICLES BY MOLDING UNDER HEAT AND PRESSURE WHEREIN THE ARTICLE IN MOLDED IN MULTIPART MOLD WHILE THE MOLD IS HOT AND FOLLOWING THE MOLDING, AT LEAST ONE MOLD PART IS REMOVED TO PROVIDE THE MOLDED ARTICLE READY FOR REMOVAL FROM A REMAINING MOLD PART WITH A PORTION OF THE SURFACE OF THE ARTICLE EXPOSED AND A PORTION OF THE SURFACE THEREOF IN CONTACT WITH THE REMAINING MOLD PART AND WHILE THE REMAINING MOLD PART IS HOT AND THE ARTICLE IS HOT, AND THE ARTICLE IN HOT CONDITION IS SUSCEPTIBLE TO INJURY UPON APPLICATION THEREOF OF A FORCE FOR THE REMOVAL THEREOF FROM THE REMAINING MOLD PART BUT IN A RELATIVELY COOL CONDITION IS OF SUFFICIENT STRENGTH FOR THE REMOVAL, THE STEP OF CONTACTING EXPOSED SURFACE OF THE ARTICLE WITH A LIQUID WHICH EVAPORATES ON SUCH CONTACTING TAKING HEAT FROM THE ARTICLE TO COOL IT SO THAT THE ARTICLE CAN BE REMOVED FROM THE REMAINING MOLD PART WITHOUT INJURY THERETO, AND THE STEP OF REMOVING THE ARTICLE FOLLOWING SAID CONTAINING, THE REMAINING MOLD PART BEING SUPPLIED WITH HEAT FOR THE MOLDING AND THE SUPPLY OF HEAT BEING CONTINUED DURING SAID CONTACTING AND THE REMOVAL OF THE MOLDED ARTICLE, WHEREBY THE ARTICLE IS REMOVED WITHOUT SUBSTANTIAL COOLING OF THE REMAINING MOLD PART.
Claim 2
Dependent Claim
215 words
IN THE PRODUCTION OF PLASTIC ARTICLES BY MOLDING UNDER HEAT AND PRESSURE WHEREIN THE ARTICLE IN MOLDED IN MULTIPART MOLD WHILE THE MOLD IS HOT AND FOLLOWING THE MOLDING, AT LEAST ONE MOLD PART IS REMOVED TO PROVIDE THE MOLDED ARTICLE READY FOR REMOVAL FROM A REMAINING MOLD PART WITH A PORTION OF THE SURFACE OF THE ARTICLE EXPOSED AND A PORTION OF THE SURFACE THEREOF IN CONTACT WITH THE REMAINING MOLD PART AND WHILE THE REMAINING MOLD PART IS HOT AND THE ARTICLE IS HOT, AND THE ARTICLE IN HOT CONDITION IS SUSCEPTIBLE TO INJURY UPON APPLICATION THEREOF OF A FORCE FOR THE REMOVAL THEREOF FROM THE REMAINING MOLD PART BUT IN A RELATIVELY COOL CONDITION IS OF SUFFICIENT STRENGTH FOR THE REMOVAL, THE STEP OF CONTACTING EXPOSED SURFACE OF THE ARTICLE WITH A LIQUID WHICH EVAPORATES ON SUCH CONTACTING TAKING HEAT FROM THE ARTICLE TO COOL IT SO THAT THE ARTICLE CAN BE REMOVED FROM THE REMAINING MOLD PART WITHOUT INJURY THERETO, AND THE STEP OF REMOVING THE ARTICLE FOLLOWING SAID CONTAINING, THE REMAINING MOLD PART BEING SUPPLIED WITH HEAT FOR THE MOLDING AND THE SUPPLY OF HEAT BEING CONTINUED DURING SAID CONTACTING AND THE REMOVAL OF THE MOLDED ARTICLE, WHEREBY THE ARTICLE IS REMOVED WITHOUT SUBSTANTIAL COOLING OF THE REMAINING MOLD PART.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |