US3156751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold for forming a ceramic article and method of making the mold
Assignee: Crane Co
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Filing: 1961-12-06
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Granted: 1964-11-10
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Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Valdes
- 👤 Carlman M Rinck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:33
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/26; B28B1/261; B28B1/262; Y; Y10; Y10S; Y10S425/00; Y10S425/029
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
194 words
A METHOD OF MAKING A MOLD PART FOR FORMING A GREEN CLAY PIECE WHICH COMPRISES: (A) FORMING SURFACES CORRESPONDING TO THE SURFACES OF THE GREEN CLAY PIECE WHICH ARE TO BE FORMED BY SAID MOLD PART, (1) SAID SURFACES HAVING INTERIOR DIMENSIONS SLIGHTLY LESS AND EXTERIOR DIMENSIONS SLIGHTLY GREATER THAN THE GREEN CLAY PIECE, (B) FORMING A GRID OVER SAID SURFACES, (C) REMOVING THE GRID FROM SAID SURFACES, (D) SECURING A NETWORK OF POROUS AIR CONDUITS TO SAID GRID, (E) LEADING AN END OF EACH OF AT LEAST SOME OF SAID CONDUITS TO A COMMON POINT SPACED FROM BUT ADJACENT SAID GRID, (F) APPLYING TO SAID ENDS OF SAID COMMON POINT COUPLING MEANS WHEREBY COMPRESSED AIR CAN BE SUPPLIED TO THE CONDUITS THROUGH SAID ENDS, (G) POSITIONING THE GRID AND CONDUITS IN A MOLD CASE WITH THE NETWORK OF CONDUITS SPACED FROM THE SURFACES OF THE MOLD CASE WHICH CORRESPOND TO THE SURFACES OF THE GREEN PIECE TO BE FORMED BY THE MOLD PART, (H) CLOSING THE MOLD CASE, AND (I) POURING MOLDING MATERIAL WHICH HARDENS AFTER POURING AND WHICH IS WATER ABSORBENT WHEN HARD INTO THE CASE AND AROUND THE GRID AND CONDUITS.
Claim 2
Independent Claim
194 words
A METHOD OF MAKING A MOLD PART FOR FORMING A GREEN CLAY PIECE WHICH COMPRISES: (A) FORMING SURFACES CORRESPONDING TO THE SURFACES OF THE GREEN CLAY PIECE WHICH ARE TO BE FORMED BY SAID MOLD PART, (1) SAID SURFACES HAVING INTERIOR DIMENSIONS SLIGHTLY LESS AND EXTERIOR DIMENSIONS SLIGHTLY GREATER THAN THE GREEN CLAY PIECE, (B) FORMING A GRID OVER SAID SURFACES, (C) REMOVING THE GRID FROM SAID SURFACES, (D) SECURING A NETWORK OF POROUS AIR CONDUITS TO SAID GRID, (E) LEADING AN END OF EACH OF AT LEAST SOME OF SAID CONDUITS TO A COMMON POINT SPACED FROM BUT ADJACENT SAID GRID, (F) APPLYING TO SAID ENDS OF SAID COMMON POINT COUPLING MEANS WHEREBY COMPRESSED AIR CAN BE SUPPLIED TO THE CONDUITS THROUGH SAID ENDS, (G) POSITIONING THE GRID AND CONDUITS IN A MOLD CASE WITH THE NETWORK OF CONDUITS SPACED FROM THE SURFACES OF THE MOLD CASE WHICH CORRESPOND TO THE SURFACES OF THE GREEN PIECE TO BE FORMED BY THE MOLD PART, (H) CLOSING THE MOLD CASE, AND (I) POURING MOLDING MATERIAL WHICH HARDENS AFTER POURING AND WHICH IS WATER ABSORBENT WHEN HARD INTO THE CASE AND AROUND THE GRID AND CONDUITS.
Claim 3
Dependent Claim
141 words
A MOLD PART TO BE JOINED WITH OTHER MOLD PARTS TO FORM A CAVITY INTO WHICH SLIP IS POURED TO FORM A GREEN CLAY PIECE WHICH COMPRISES: (A) A MOLD BODY HAVING SURFACES CORRESPONDING TO A PORTION OF THE SURFACES OF THE GREEN CLAY PIECE, (B) A GRID WITHIN SAID MOLD, (1) SAID GRID HAVING CROSS MEMBERS ARRANGED TO FORM A NETWORK, (2) SAID NETWORK EXTENDING PARALLEL TO BUT SPACED WITHIN SAID BODY FROM SAID MOLD SURFACES, (C) A NETWORK OF POROUS CONDUITS SECURED TO SAID GRID AND POSITIONED WITHINSAID MOLD BODY GENERALLY PARALLEL TO BUT AWAY FROM SAID MOLD SURFACES, (1) THE ENDS OF SOME OF SAID CONDUITS EXTENDING TO A COMMON POINT POSITIONED WAY FROM SAID MOLD BODY, AND (D) MEANS FRO CONNECTING THE CONDUITS THROUGH SAID ENDS POSITIONED AT SAID COMMON POINT TO A SOURCE OF COMPRESSED AIR.
Claim 4
Dependent Claim
141 words
A MOLD PART TO BE JOINED WITH OTHER MOLD PARTS TO FORM A CAVITY INTO WHICH SLIP IS POURED TO FORM A GREEN CLAY PIECE WHICH COMPRISES: (A) A MOLD BODY HAVING SURFACES CORRESPONDING TO A PORTION OF THE SURFACES OF THE GREEN CLAY PIECE, (B) A GRID WITHIN SAID MOLD, (1) SAID GRID HAVING CROSS MEMBERS ARRANGED TO FORM A NETWORK, (2) SAID NETWORK EXTENDING PARALLEL TO BUT SPACED WITHIN SAID BODY FROM SAID MOLD SURFACES, (C) A NETWORK OF POROUS CONDUITS SECURED TO SAID GRID AND POSITIONED WITHINSAID MOLD BODY GENERALLY PARALLEL TO BUT AWAY FROM SAID MOLD SURFACES, (1) THE ENDS OF SOME OF SAID CONDUITS EXTENDING TO A COMMON POINT POSITIONED WAY FROM SAID MOLD BODY, AND (D) MEANS FRO CONNECTING THE CONDUITS THROUGH SAID ENDS POSITIONED AT SAID COMMON POINT TO A SOURCE OF COMPRESSED AIR.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |