Patent US3078508A successfully refreshed from Google Patents.
US3078508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for blow molding hollow articles
Assignee: Hoover Universal Inc
•
Filing: 1961-04-26
•
Granted: 1963-02-26
•
Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Merritt Warren Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:39
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/48; B29C49/4823; B29C33/00; B29C33/10; B29C33/38; B29C33/3814; B29C49/02; B29C49/04; B29C49/18; B29C49/62; B29C35/00; B29C35/02; B29C35/04; B29C35/16; Y; Y10; Y10S; Y10S264/00; Y10S264/78; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
109 words
IN APPARATUS FOR BLOW MOLDING HOLLOW PLASTIC ARTICLES WHICH INCLUDED MEANS FOR PROVIDING A TUBULAR PARISON OF EXPANDIBLE PLASTIC MATERIAL AND MEANS FOR INJECTING A BLOWING FLUID INTO SAID PARISON, A PAIR OF MOLD HAVING A CAVITY MOVABLE INTO ENGAGEMENTS TO FORM A MOLD HAVING A CAVITY WHICH SURRONDS SAID PARISON, SAID MOLD SECTIONS ON OPPOSITE SIDES OF SAID PARISON BEING FORMED OF A POROUS METAL, AND REVERSIBLE BLOWER MEANS CONNECTED TO SAID MOLD SECTIONS AND OPERABLE SELECTIVELY TO MOVE AIR IN ONE DIRECTION THROUGH SAID POROUS METAL FOR DRAWING AIR OUT OF SAID MOLD CAVITY OR IN AN OPPOSITE DIRECTION FOR SUPPLYING COOLING AIR TO SAID MOLD SECTIONS.
Claim 2
Dependent Claim
109 words
IN APPARATUS FOR BLOW MOLDING HOLLOW PLASTIC ARTICLES WHICH INCLUDED MEANS FOR PROVIDING A TUBULAR PARISON OF EXPANDIBLE PLASTIC MATERIAL AND MEANS FOR INJECTING A BLOWING FLUID INTO SAID PARISON, A PAIR OF MOLD HAVING A CAVITY MOVABLE INTO ENGAGEMENTS TO FORM A MOLD HAVING A CAVITY WHICH SURRONDS SAID PARISON, SAID MOLD SECTIONS ON OPPOSITE SIDES OF SAID PARISON BEING FORMED OF A POROUS METAL, AND REVERSIBLE BLOWER MEANS CONNECTED TO SAID MOLD SECTIONS AND OPERABLE SELECTIVELY TO MOVE AIR IN ONE DIRECTION THROUGH SAID POROUS METAL FOR DRAWING AIR OUT OF SAID MOLD CAVITY OR IN AN OPPOSITE DIRECTION FOR SUPPLYING COOLING AIR TO SAID MOLD SECTIONS.
Claim 3
Independent Claim
89 words
THE METHOD OF BLOW MOLDING HOLLOW ARTICLES FRM A TUBULAR PARISON OF EXPANDIBLE PLASTIC MATERIAL WHICH COMPRISES FORMING A MOLD HAVING A WALL DEFINING A CAVITY WHICH IS POSITIONED SO THAT SAID PARISON IS SURRONDED BY THE MOLD CAVITY, EVACUATING SUFFICIENT AIR FROM SAID CAVITY THROUGH SAID MOLD TO PARTIALLY EXPAND SAID PARISION RADIALLY OUTWARDLY TO A POSITION SPACED FROM SAID WALL, AND SUPPLTING A FLUID UNDER PRESSURE OF THE INTERIOR OF SAID PARISON SO AS TO FULLY EXPAND IT OUTWARDLY AGAINST SAID WALL INTO CONFORMITY WITH SAID CAVITY.
Claim 4
Independent Claim
89 words
THE METHOD OF BLOW MOLDING HOLLOW ARTICLES FRM A TUBULAR PARISON OF EXPANDIBLE PLASTIC MATERIAL WHICH COMPRISES FORMING A MOLD HAVING A WALL DEFINING A CAVITY WHICH IS POSITIONED SO THAT SAID PARISON IS SURRONDED BY THE MOLD CAVITY, EVACUATING SUFFICIENT AIR FROM SAID CAVITY THROUGH SAID MOLD TO PARTIALLY EXPAND SAID PARISION RADIALLY OUTWARDLY TO A POSITION SPACED FROM SAID WALL, AND SUPPLTING A FLUID UNDER PRESSURE OF THE INTERIOR OF SAID PARISON SO AS TO FULLY EXPAND IT OUTWARDLY AGAINST SAID WALL INTO CONFORMITY WITH SAID CAVITY.
References Cited (Backward Citations)
US1592536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |