US2923654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for forming apertures in molded pulp articles
Assignee: Diamond National Corp
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Filing: 1955-01-06
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Granted: 1960-02-02
•
Expires: 1975-01-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Comstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:50
CPC Classifications
D; D21; D21J; D21J7/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
APPARATUS FOR FORMING APERTURED ARTICLES OF MOLDED PULP, COMPRISING A FORMING DIE SURFACE AGAINST WHICH WET FIBERS ARE DEPOSITED IN FORMING AN ARTICLE, SAID SURFACE HAVING AN OPENING OF THE GENERAL OUTLINE OF AN APERTURE DESIRED IN THE ARTICLE, AND A JET UNIT DISPOSED IN SAID OPENING, SAID UNIT COMPRISING AN INTERNAL CORE HAVING AN IMPERFORATE FORWARD SURFACE POSITIONED WITHIN SAID OPENING AND A TUBULAR SHELL SURROUNDING SAID CORE SURFACE WITH SMALL SIDE CLEARANCE TO AFFORD A FORWARD JET ORIFICE BETWEEN THE CORE AND SHELL.
Claim 2
Dependent Claim
85 words
APPARATUS FOR FORMING APERTURED ARTICLES OF MOLDED PULP, COMPRISING A FORMING DIE SURFACE AGAINST WHICH WET FIBERS ARE DEPOSITED IN FORMING AN ARTICLE, SAID SURFACE HAVING AN OPENING OF THE GENERAL OUTLINE OF AN APERTURE DESIRED IN THE ARTICLE, AND A JET UNIT DISPOSED IN SAID OPENING, SAID UNIT COMPRISING AN INTERNAL CORE HAVING AN IMPERFORATE FORWARD SURFACE POSITIONED WITHIN SAID OPENING AND A TUBULAR SHELL SURROUNDING SAID CORE SURFACE WITH SMALL SIDE CLEARANCE TO AFFORD A FORWARD JET ORIFICE BETWEEN THE CORE AND SHELL.
Claim 3
Independent Claim
132 words
THE METHOD OF FORMING A MOLDED PULP ARTICLE HAVING AN APERTURE THERETHROUGH COMPRISING IMMERSING A SUCTION MOLD IN A SLURRY OF PULP FIBERS, AND APPLYING SUCTION THERETO TO DRAW LIQUID INWARDLY OF THE MOLD AND FORM A LAYER OF INTERLACED PULP FIBERS ON THE SURFACE OF THE MOLD, THEN WITHDRAWING THE MOLD FROM THE SLURRY, AND THEN DIRECTING A HOLLOW STREAM OF GAS UNDER PRESSURE FROM THE INTERIOR OF THE MOLD OUTWARDLY OF THE MOLD THROUGH THE LAYER OF PULP ON THE MOLD SO THAT THIN MARGINNAL PORTIONS OF SAID STREAM ARE DIRECTED ALONG THE OUTLINE OF THE DESIRED APERTURE WHILE MAINTAINING SUCTION WITHIN THE MOLD TO HOLD THE LAYER OF FIBERS IN POSITION ON THE MOLD AND WHILE THE FIBERS ARE WET AND RELATIVELY FREE TO SLIP APART FROM EACH OTHER.
Claim 4
Independent Claim
132 words
THE METHOD OF FORMING A MOLDED PULP ARTICLE HAVING AN APERTURE THERETHROUGH COMPRISING IMMERSING A SUCTION MOLD IN A SLURRY OF PULP FIBERS, AND APPLYING SUCTION THERETO TO DRAW LIQUID INWARDLY OF THE MOLD AND FORM A LAYER OF INTERLACED PULP FIBERS ON THE SURFACE OF THE MOLD, THEN WITHDRAWING THE MOLD FROM THE SLURRY, AND THEN DIRECTING A HOLLOW STREAM OF GAS UNDER PRESSURE FROM THE INTERIOR OF THE MOLD OUTWARDLY OF THE MOLD THROUGH THE LAYER OF PULP ON THE MOLD SO THAT THIN MARGINNAL PORTIONS OF SAID STREAM ARE DIRECTED ALONG THE OUTLINE OF THE DESIRED APERTURE WHILE MAINTAINING SUCTION WITHIN THE MOLD TO HOLD THE LAYER OF FIBERS IN POSITION ON THE MOLD AND WHILE THE FIBERS ARE WET AND RELATIVELY FREE TO SLIP APART FROM EACH OTHER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |