Patent US4360335A successfully refreshed from Google Patents.
US4360335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding press for semi-pneumatic tire bodies and the like
Assignee: Spartech Industries Inc
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Filing: 1981-08-28
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Granted: 1982-11-23
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Expires: 2001-08-28
Abstract
Abstract A molding press comprises a stationary platen or die fixed in a machine frame and a cooperating movable platen or die positionable toward and away from the stationary platen for operation through a molding cycle. Cam slot and follower guide means direct the movable platen through a clamshell movement; and a scissors mechanism is connected between the machine frame and the movable platen with a reversible electric motor providing rotational force to the lead screw of the scissors mechanism.
Inventors
- 👤 Wilson West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:44
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/006; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0649; B30B15/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
A molding press comprising: a machine frame; a stationary platen secured to said machine frame; a movable platen positionable toward and away from said stationary platen for operation through a molding cycle; guide means for directing the path of movement of said movable platen; power providing means; and a scissors mechanism, including a rotatable lead screw connected to said power providing means, a system of pivotally interconnected links fastened to said movable platen and to said machine frame, and a nut fixed in said linkage system and threadedly mounted on said lead screw.
Claim 2
Dependent Claim
93 words
A molding press comprising: a machine frame; a stationary platen secured to said machine frame; a movable platen positionable toward and away from said stationary platen for operation through a molding cycle; guide means for directing the path of movement of said movable platen; power providing means; and a scissors mechanism, including a rotatable lead screw connected to said power providing means, a system of pivotally interconnected links fastened to said movable platen and to said machine frame, and a nut fixed in said linkage system and threadedly mounted on said lead screw.
Claim 3
Dependent Claim
36 words
A molding press according to claim 1 wherein said guide means includes cam slot means secured to said machine frame and cam follower means fixed to said movable platen and operable in said cam slot means.
Claim 4
Dependent Claim
48 words
A molding press according to claim 2 wherein said cam slot means includes substantially vertical track portion means proximal to said fixed platen and angled track portion means distal from said fixed platen, for directing said movable platen through a clamshell movement upon opening and closing the press.
Claim 5
Dependent Claim
27 words
A molding press according to claim 1 wherein said stationary platen and said movable platen are disposed in respective lower and upper positions relative to each other.
Claim 6
Dependent Claim
30 words
A molding press according to claim 1 wherein said power providing means includes a reversible drive motor and a speed-reducing gear unit connected between said motor and said lead screw.
Claim 7
Dependent Claim
46 words
A molding press according to claim 1 wherein said system of links includes means defining a central vertical axis through said machine frame and wherein said system of links includes paired links inboard and outboard of said axis whereby to distribute the compression forces of molding.
Claim 8
Dependent Claim
35 words
A molding press according to claim 6 wherein said paired links include fore and aft paired lower links connected to said movable platen and fore and aft paired upper links connected to said machine frame.
Claim 9
Dependent Claim
39 words
A molding press according to claim 1 which further comprises spaced rocker bars connected between said scissors mechanism and said machine frame, said bars having confronting coarse knife edges defining a central plane across which molding forces seek equilibrium.
Claim 10
Dependent Claim
34 words
A molding press according to claim 8 wherein said system of links includes paired links disposed in equal number on the opposite sides of said plane whereby to distribute the compression forces of molding.
Claim 11
Dependent Claim
41 words
A molding press according to claim 9 wherein said paired links include fore and aft paired lower links connected to said movable platen and fore and aft paired upper links connected to said machine frame by means including said rocker bars.
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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) | 1985-11-22 | 1986-05-24 | 1986-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-22 | 1990-05-24 | 1990-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-22 | 1994-05-24 | 1994-11-23 | $7700.00 | Window Closed / Lapsed |