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US3694541A
Expired / Lapsed
US
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Method for forming a molded article
Assignee: Owens Corning
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Filing: 1970-07-06
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Granted: 1972-09-26
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Expires: 1990-07-06
Abstract
Abstract A method of forming an article of formable material wherein the formable material is positioned between registering die elements of a press. The die elements are advanced toward each other to a point of separation determined by releasable indexing stop means. The die elements are retained in the separated aligned condition determined by the indexing stop means for a predetermined time cycle, after which time the stop means are released allowing the full pressure of the press to be applied to the formable material between the die elements to complete the forming operation. The die elements are then separated and the molded article is removed.
Inventors
- 👤 Robert J Gelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:46
CPC Classifications
B; B29; B29C; B29C43/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
187 words
A method for forming molded articles in a press having a pair of matched die elements movable between an open position and a closed molding position and with at least one stop member movable from a remote retracted position to an advance position to interfere with movement of said die elements, comprising the steps of (1) placing said die elements in open position, (2) placing said stop member in its said advance position to define an intermediate position of said die elements between their said open and closed molding positions, (3) placing a charge of formable material between said die elements, (4) moving said die elements towards their said closed position until said stop member interferes with further movement, thereby causing said die elements to stop at said defined intermediate position and to attain a position of alignment with one another, (5) holding said die members at said intermediate position for a predetermined time while continuing to urge them towards said closed position, (6) and moving said stop member to its said retracted position, thereby permitting said die members to move to their said closed molding position.
Claim 2
Independent Claim
187 words
A method for forming molded articles in a press having a pair of matched die elements movable between an open position and a closed molding position and with at least one stop member movable from a remote retracted position to an advance position to interfere with movement of said die elements, comprising the steps of (1) placing said die elements in open position, (2) placing said stop member in its said advance position to define an intermediate position of said die elements between their said open and closed molding positions, (3) placing a charge of formable material between said die elements, (4) moving said die elements towards their said closed position until said stop member interferes with further movement, thereby causing said die elements to stop at said defined intermediate position and to attain a position of alignment with one another, (5) holding said die members at said intermediate position for a predetermined time while continuing to urge them towards said closed position, (6) and moving said stop member to its said retracted position, thereby permitting said die members to move to their said closed molding position.
Claim 3
Independent Claim
207 words
A method for forming molded articles in a press having a pair of matched die elements movable between an open and a closed molding position and power means for exerting a force upon said die elements urging them toward said closed position and with at least one stop member movable from a remote retracted position to an advance position to interfere with movement of said die elements, comprising the steps of (1) placing said die elements in open position, (2) placing said stop member in its said advance position to define an intermediate position of said die elements between said open and closed positions, said intermediate position establishing a position of alignment for said die elements, (3) placing a charge of formable material between said die elements, (4) actuating said power means to urge said die elements towards said closed position until said stop member interferes with further movement thereby causing said die elements to stop at said defined intermediate position, (5) continuing to force said die elements together while in said intermediate position to attain a position of alignment with one another, (6) moving said stop member to its said retracted position, thereby permitting said aligned die members to move to their said closed molding position.
Claim 4
Independent Claim
207 words
A method for forming molded articles in a press having a pair of matched die elements movable between an open and a closed molding position and power means for exerting a force upon said die elements urging them toward said closed position and with at least one stop member movable from a remote retracted position to an advance position to interfere with movement of said die elements, comprising the steps of (1) placing said die elements in open position, (2) placing said stop member in its said advance position to define an intermediate position of said die elements between said open and closed positions, said intermediate position establishing a position of alignment for said die elements, (3) placing a charge of formable material between said die elements, (4) actuating said power means to urge said die elements towards said closed position until said stop member interferes with further movement thereby causing said die elements to stop at said defined intermediate position, (5) continuing to force said die elements together while in said intermediate position to attain a position of alignment with one another, (6) moving said stop member to its said retracted position, thereby permitting said aligned die members to move to their said closed molding position.
Claim 5
Dependent Claim
32 words
The method of claim 2 in which said die members are held at their said intermediate position for a predetermined time prior to moving said stop member to its said retracted position.
Claim 6
Independent Claim
217 words
A method of forming molded articles in a press having a fixed die element and a matching die element movable from an open position to a closed molding position and power means for exerting a force upon said movable die element urging it towards its said closed molding position and at least one stop member movable from a retracted position to an advance position to interfere with movement of said movable die element, comprising the steps of (1) placing said movable die element in open position, (2) placing said stop member in its said advance position to define an intermediate position of said movable die element between its said open and closed position with said intermediate position establishing a position of alignment with said fixed die element, (3) placing a charge of formable material between said die elements, (4) actuating said power means to move said movable die element towards said closed position until said stop member interferes with further movement thereby causing said movable die element to stop at said defined intermediate position while being urged towards closed position, and to attain said position of alignment with said fixed die element, and (5) moving said stop member to its said retracted position, thereby permitting said aligned movable die element to move to its said closed position.
Claim 7
Independent Claim
217 words
A method of forming molded articles in a press having a fixed die element and a matching die element movable from an open position to a closed molding position and power means for exerting a force upon said movable die element urging it towards its said closed molding position and at least one stop member movable from a retracted position to an advance position to interfere with movement of said movable die element, comprising the steps of (1) placing said movable die element in open position, (2) placing said stop member in its said advance position to define an intermediate position of said movable die element between its said open and closed position with said intermediate position establishing a position of alignment with said fixed die element, (3) placing a charge of formable material between said die elements, (4) actuating said power means to move said movable die element towards said closed position until said stop member interferes with further movement thereby causing said movable die element to stop at said defined intermediate position while being urged towards closed position, and to attain said position of alignment with said fixed die element, and (5) moving said stop member to its said retracted position, thereby permitting said aligned movable die element to move to its said closed position.
Claim 8
Dependent Claim
33 words
The method of claim 4 in which said movable die element is held at its said intermediate position for a predetermined time prior to moving said stop member to its said retracted position.
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |