US3301929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sinter-molding process
Assignee: Individual
•
Filing: 1964-09-22
•
Granted: 1967-01-31
•
Expires: 1984-09-22
Abstract
No abstract record available.
Inventors
- 👤 Bruun Bjorn Adler Zeuthen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:50
CPC Classifications
G; G06; G06M; G06M7/00; G06M7/02; G06M7/06; B; B29; B29C; B29C39/00; B29C41/00; B29C41/02; B29C41/18; B29C43/00; B29C43/006; B29C43/02; B29C43/14; B29C67/00; B29C67/0044; B29C69/00; B29C69/004; B29C33/00; B29C33/0011; B29C33/76; B29K; B29K2105/00; B29K2105/25; B29K2105/251
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
IN A SINTER-MOLDING PROCESS IN WHICH AN EXTERNALLY HEATED HOLLOW MOLD HAVING AN INNER SURFACE WITH THE CONFIGURATION OF AN ARTICLE TO BE PRODUCED IS CHARGED WITH A FINELY DIVIDED SOLID THERMOPLASTIC MATERIAL THAT WILL COALESCE BY MELTING AT THE TEMPERATURE TO WHICH THE INNER MOLD SURFACE IS HEATED AND THE HEATING IS CONTINUED UNTIL, BY CONTINUED COALESCENCE OF PARTICLES OF SAID MATERIAL, A FUSED PLASTIC WALL STRUCTURE OF REQUIRED THICKNESS IF FORMED ON SAID SURFACE, SAID WALL STRUCTURE THEREAFTER BEING COOLED TO SOLIDIFY IT ON SAID SURFACE; THE IMPROVEMENT COMPRISING PLACING A CORE WITHIN SAID HOLLOW MOLD TO REST ON A PORTION OF SAID CHARGE OF THERMOPLASTIC MATERIAL AT THE BOTTOM OF THE MOLD AND WHICH HAS SIDES SLOPING UPWARDLY AWAY FROM THE ADJACENT SIDES OF THE MOLD SO THAT THE REMAINING PORTION OF SAID CHARGE FILLING THE SPACE BETWEEN SAID SLOPING SIDES OF THE CORE AND ADJACENT SIDES OF THE MOLD EXERTS A PRESSURE OUTWARDLY AGAINST THE LATTER, AND REMOVING SAID CORE FROM THE MOLD AFTER SAID FUSED PLASTIC WALL STRUCTURE IS FORMED ON SAID INNER SURFACE OF THE MOLD, THEREBY TO EFFECT THE REMOVAL WITH SAID CORE OF SUBSTANTIAL QUANTITIES OF UNFUSED THERMOPLASTIC MATERIAL FROM SAID SPACE BETWEEN THE MOLD AND CORE.
Claim 2
Dependent Claim
205 words
IN A SINTER-MOLDING PROCESS IN WHICH AN EXTERNALLY HEATED HOLLOW MOLD HAVING AN INNER SURFACE WITH THE CONFIGURATION OF AN ARTICLE TO BE PRODUCED IS CHARGED WITH A FINELY DIVIDED SOLID THERMOPLASTIC MATERIAL THAT WILL COALESCE BY MELTING AT THE TEMPERATURE TO WHICH THE INNER MOLD SURFACE IS HEATED AND THE HEATING IS CONTINUED UNTIL, BY CONTINUED COALESCENCE OF PARTICLES OF SAID MATERIAL, A FUSED PLASTIC WALL STRUCTURE OF REQUIRED THICKNESS IF FORMED ON SAID SURFACE, SAID WALL STRUCTURE THEREAFTER BEING COOLED TO SOLIDIFY IT ON SAID SURFACE; THE IMPROVEMENT COMPRISING PLACING A CORE WITHIN SAID HOLLOW MOLD TO REST ON A PORTION OF SAID CHARGE OF THERMOPLASTIC MATERIAL AT THE BOTTOM OF THE MOLD AND WHICH HAS SIDES SLOPING UPWARDLY AWAY FROM THE ADJACENT SIDES OF THE MOLD SO THAT THE REMAINING PORTION OF SAID CHARGE FILLING THE SPACE BETWEEN SAID SLOPING SIDES OF THE CORE AND ADJACENT SIDES OF THE MOLD EXERTS A PRESSURE OUTWARDLY AGAINST THE LATTER, AND REMOVING SAID CORE FROM THE MOLD AFTER SAID FUSED PLASTIC WALL STRUCTURE IS FORMED ON SAID INNER SURFACE OF THE MOLD, THEREBY TO EFFECT THE REMOVAL WITH SAID CORE OF SUBSTANTIAL QUANTITIES OF UNFUSED THERMOPLASTIC MATERIAL FROM SAID SPACE BETWEEN THE MOLD AND CORE.
References Cited (Backward Citations)
US2915788A
Cited
US3122787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |