US3919386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rapidly forming hollow objects from reinforced plastic sheeting
Assignee: Honeywell International Inc
•
Filing: 1973-03-01
•
Granted: 1975-11-11
•
Expires: 1993-03-01
Abstract
Abstract A method for forming hollow or tubular objects from thermoplastic or thermosetting polymer compositions employing a stamping or rapid forming operation. The plastic objects may optionally be reinforced and/or particulate filled and are formed by stamping around an internal shape using matched external mating mold sections.
Inventors
- 👤 Leon Segal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:30
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/0011; B29C43/00; B29C43/02; B29C43/027; B29C53/00; B29C53/36; B29C53/38; B29C53/40; B29C53/42; B29C67/0014; B29C70/00; B29C70/04; B29C70/28; B29D; B29D23/00; B29D23/001; B29D99/00; B29D99/0003; B29K; B29K2027/00; B29K2027/06
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
12 words
A METHOD OF FORMING A CONTINUOUS HOLLOW OBJECT COMPRISING THE STEPS OF:
Claim 2
Independent Claim
12 words
A METHOD OF FORMING A CONTINUOUS HOLLOW OBJECT COMPRISING THE STEPS OF:
Claim 3
Dependent Claim
58 words
PLACING A FIRST FORMALABLE PLASTIC CHARGE OF VOLUME SUFFIPLACIENT TO YIELD A FIRST SECTION OF THE DESIRED SHAPE, SAID SECTION HAVING AN EXPANDED END AND AN OPPOSITE UNXPANDED END BETWEEN A RELATIVELY MOVING MOLDNG SYSTEM COMPRISING: A. AN INTERNAL MANDREL OF A FORM CRRESPONDING TO THE INNER SHAPE OF THE DESIRED ARTICLE AND B. EXTERNAL MATED MOLDING SECTIONS,
Claim 4
Dependent Claim
58 words
PLACING A FIRST FORMALABLE PLASTIC CHARGE OF VOLUME SUFFIPLACIENT TO YIELD A FIRST SECTION OF THE DESIRED SHAPE, SAID SECTION HAVING AN EXPANDED END AND AN OPPOSITE UNXPANDED END BETWEEN A RELATIVELY MOVING MOLDNG SYSTEM COMPRISING: A. AN INTERNAL MANDREL OF A FORM CRRESPONDING TO THE INNER SHAPE OF THE DESIRED ARTICLE AND B. EXTERNAL MATED MOLDING SECTIONS,
Claim 5
Dependent Claim
16 words
CLOSING THE SYSTEM AND EXERTING SUFFICEINT PRESSURE AND HEAT TO SHAPE THE CHARGE AROUND THE MANDRREL.
Claim 6
Dependent Claim
16 words
CLOSING THE SYSTEM AND EXERTING SUFFICEINT PRESSURE AND HEAT TO SHAPE THE CHARGE AROUND THE MANDRREL.
Claim 7
Dependent Claim
16 words
closing the system and exerting sufficient pressure and heat to shape The charge around the mandrel;
Claim 8
Dependent Claim
16 words
closing the system and exerting sufficient pressure and heat to shape The charge around the mandrel;
Claim 9
Dependent Claim
13 words
The method of claim 1 in which the mandrel possesses a circular cross-section.
Claim 10
Dependent Claim
13 words
The method of claim 1 in which the mandrel possesses an I-shaped cross-section.
Claim 11
Dependent Claim
9 words
allowing sufficient time to permit the charge to solidify;
Claim 12
Dependent Claim
9 words
allowing sufficient time to permit the charge to solidify;
Claim 13
Dependent Claim
9 words
ALLOWING SUFFICIENT TIME TO PERMIT THE CHARGE TO SOLIDIFY,
Claim 14
Dependent Claim
9 words
ALLOWING SUFFICIENT TIME TO PERMIT THE CHARGE TO SOLIDIFY,
Claim 15
Dependent Claim
7 words
REMOVING THE FIRST SECTION FROM THE MANDREL,
Claim 16
Dependent Claim
7 words
REMOVING THE FIRST SECTION FROM THE MANDREL,
Claim 17
Dependent Claim
7 words
removing the first section from the mandrel;
Claim 18
Dependent Claim
7 words
removing the first section from the mandrel;
Claim 19
Dependent Claim
13 words
The method of claim 1 in which the external mating sections are moveable.
Claim 20
Dependent Claim
16 words
The method of claim 1 in which the charge is in the form of a sheet.
Claim 21
Dependent Claim
36 words
placing a second formable plastic charge of volume sufficient to yield a second section of the desired shape, said second section having an unexpanded end and an opposite expanded end, between said relatively moving molding system;
Claim 22
Dependent Claim
36 words
placing a second formable plastic charge of volume sufficient to yield a second section of the desired shape, said second section having an unexpanded end and an opposite expanded end, between said relatively moving molding system;
Claim 23
Dependent Claim
33 words
PLACING A SECOND FORMALABLE PLASTIC CHARGE OF VOLUME SUFFICIENT TO YIELD A SECOND OF THE DESIRED SHAP, SAID SECOND SECTION HAVING A UNEXPANDED END AN OPPOEXPANDED END, BETWEEN SAID RELATIVE MOVING MOLDING SYSTEM,
Claim 24
Dependent Claim
33 words
PLACING A SECOND FORMALABLE PLASTIC CHARGE OF VOLUME SUFFICIENT TO YIELD A SECOND OF THE DESIRED SHAP, SAID SECOND SECTION HAVING A UNEXPANDED END AN OPPOEXPANDED END, BETWEEN SAID RELATIVE MOVING MOLDING SYSTEM,
Claim 25
Dependent Claim
26 words
MAINTAINING SAID UNEXPANDED END OF SAID FIRTS SECTION IN CONTACT WITH PORTION OF SAID FORMABLE PLASTIC CHARGE THAT FORMS SAID EXPANDED END OF SAID SECOND SECTION,
Claim 26
Dependent Claim
26 words
MAINTAINING SAID UNEXPANDED END OF SAID FIRTS SECTION IN CONTACT WITH PORTION OF SAID FORMABLE PLASTIC CHARGE THAT FORMS SAID EXPANDED END OF SAID SECOND SECTION,
Claim 27
Dependent Claim
28 words
maintaining said unexpanded end of said first section in contact with the portion of said second formable plastic charge that forms said expanded end of said second section;
Claim 28
Dependent Claim
28 words
maintaining said unexpanded end of said first section in contact with the portion of said second formable plastic charge that forms said expanded end of said second section;
Claim 29
Dependent Claim
12 words
The method of claim 1 in which the plastic material is reinforced.
Claim 30
Dependent Claim
12 words
The method of claim 1 in which the plastic material is filled.
Claim 31
Dependent Claim
17 words
closing the system and exerting sufficient pressure and heat to shape said second charge around the mandrel;
Claim 32
Dependent Claim
17 words
closing the system and exerting sufficient pressure and heat to shape said second charge around the mandrel;
Claim 33
Dependent Claim
17 words
CLOSING THE SYSTEM AND EXERTING SUFFICIENT PRESSURE AND HEAT TO SHAPE SAID SECOND CHARGE AROUND THE MANDERL,
Claim 34
Dependent Claim
17 words
CLOSING THE SYSTEM AND EXERTING SUFFICIENT PRESSURE AND HEAT TO SHAPE SAID SECOND CHARGE AROUND THE MANDERL,
Claim 35
Dependent Claim
28 words
ALLOWING SUFFICIENT TIME TO PERMIT SAID SECOND CHARGE TO SOLIDIFY INTO A SECOND SECTION HAVING ITS EXPANDED END IN CONTACT WITH SAID UNEXPANDED END OF THE FIRST SECTION
Claim 36
Dependent Claim
28 words
ALLOWING SUFFICIENT TIME TO PERMIT SAID SECOND CHARGE TO SOLIDIFY INTO A SECOND SECTION HAVING ITS EXPANDED END IN CONTACT WITH SAID UNEXPANDED END OF THE FIRST SECTION
Claim 37
Dependent Claim
28 words
allowing sufficient time to permit said second charge to solidify into a second section having its expanded end in contact with said unexpanded end of the first section;
Claim 38
Dependent Claim
28 words
allowing sufficient time to permit said second charge to solidify into a second section having its expanded end in contact with said unexpanded end of the first section;
Claim 39
Dependent Claim
11 words
The method of claim 1 in which the thermoplastic is polyethylene.
Claim 40
Dependent Claim
11 words
The method of claim 1 in which the thermoplastic is polypropylene.
Claim 41
Dependent Claim
20 words
removing said second section from said mandrel; and 10 repeating steps (1) through (9) to form a continuous hollow object.
Claim 42
Dependent Claim
20 words
removing said second section from said mandrel; and 10 repeating steps (1) through (9) to form a continuous hollow object.
Claim 43
Dependent Claim
21 words
REMOVNG SAID SECOND SECTION FROM SAID MANDERL, AND 10 REPEATING THE STEPS (1) THROUGH (9) TO FORM A CONTINUOUS HOLLOW OBJECT
Claim 44
Dependent Claim
21 words
REMOVNG SAID SECOND SECTION FROM SAID MANDERL, AND 10 REPEATING THE STEPS (1) THROUGH (9) TO FORM A CONTINUOUS HOLLOW OBJECT
Claim 45
Dependent Claim
12 words
The method of claim 1 in which the thermoplastic is nylon 6.
Claim 46
Dependent Claim
12 words
The method of claim 1 in which the thermoplastic is polyvinyl chloride.
Claim 47
Dependent Claim
14 words
The method of claim 1 in which the thermosetting polymer is a cross-linked polyester.
Claim 48
Dependent Claim
14 words
The method of claim 1 in which the thermosetting polymer is a curable polyurethane.
Claim 49
Dependent Claim
14 words
The method of claim 1 in which the thermosetting polymer contains an epoxy group.
References Cited (Backward Citations)
US329273A
Cited
US1352161A
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US2033643A
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US2892217A
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US3626053A
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US3655863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |