Patent US3740177A successfully refreshed from Google Patents.
US3740177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inlet reservoir for continuous polymer casting machine
Assignee: Monsanto Co
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Filing: 1970-10-12
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Granted: 1973-06-19
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Expires: 1990-10-12
Abstract
Abstract An inlet reservoir for use in conjunction with a continuous polymer casting machine which forms an endless sheet or film of a polymeric material within a cavity developed between a pair of mold forming surfaces; said reservoir including a pair of side plates that are designed to conform to the shape of the proximate mold forming surfaces, and including movable sealing gaskets that dispose intermediate the edges of said plates and the mold forming surfaces to preclude seepage of the retained monomer or polymer. This reservoir is of adjustable width, and support means upon the plates includes expandable bracing that regulates the reservoir width, and also casters that ride upon the mold forming surfaces stabilize the reservoir in relation to said surfaces. Since the sealing gaskets further extend between the mold forming surfaces, and are pressed firmly therein, movement of these surfaces during the casting operation also sustains movement of the gaskets, while the gaskets simultaneously act as edge-sealing means for the mold cavity thereby preventing leakage of the polymer while being cast.
Inventors
- 👤 M Hoyt
- 👤 B Junker
- 👤 R Hedrick
- 👤 T Breeding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:06
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/911; B29C48/9135; B29L; B29L2007/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
130 words
In combination with a continuous polymer casting machine having a mold cavity intermediate a pair of movable mold forming surfaces, a feed inlet reservoir for introducing a polymeragenic composition into the mold cavity of said casting machine, said inlet reservoir comprising at least two side plates for use in retaining said composition proximate the inlet opening of the mold cavity and directing its entrance therein, the edges of said plates in contiguity with the mold forming surfaces being contoured to conform with the shape of said surfaces, movable sealing means arranged intermediate the edges of each side plate and the contiguous mold forming surfaces to retard leakage of said composition from the reservoir, and support means stabilizing said plates with respect to the mold forming surfaces of the casting machine.
Claim 2
Dependent Claim
130 words
In combination with a continuous polymer casting machine having a mold cavity intermediate a pair of movable mold forming surfaces, a feed inlet reservoir for introducing a polymeragenic composition into the mold cavity of said casting machine, said inlet reservoir comprising at least two side plates for use in retaining said composition proximate the inlet opening of the mold cavity and directing its entrance therein, the edges of said plates in contiguity with the mold forming surfaces being contoured to conform with the shape of said surfaces, movable sealing means arranged intermediate the edges of each side plate and the contiguous mold forming surfaces to retard leakage of said composition from the reservoir, and support means stabilizing said plates with respect to the mold forming surfaces of the casting machine.
Claim 3
Dependent Claim
65 words
The invention of claim 1 wherein said movable sealing means comprises lengths of gaskets, one of said gaskets inserting intermediate each edge of a side plate contiguous with a mold forming surface, the location of insertion of each gasket being at least above the upward level of the composition retained by the inlet reservoir, and means moving said gaskets during operation of said casting machine.
Claim 4
Dependent Claim
28 words
The invention of claim 2 including guides connecting with said side plates and directing the insertion of said gaskets intermediate the plate edges and the mold forming surfaces.
Claim 5
Dependent Claim
31 words
The invention of claim 2 wherein the edges of the side plates accommodating the gaskets into proximity with the mold forming surfaces are grooved for guiding the movement of the gaskets.
Claim 6
Dependent Claim
39 words
The invention of claim 2 wherein the side plates of said inlet reservoir extend into proximity with the entrance to the mold cavity, and said movable gaskets extend beyond said plates and into the entrance of said mold cavity.
Claim 7
Dependent Claim
35 words
The invention of claim 5 wherein the movable gaskets extending into the entrance of said mold cavity form an edge-sealing means between the mold forming surfaces for the composition being cast within the casting machine.
Claim 8
Dependent Claim
42 words
The invention of claim 6 wherein that portion of the movable gaskets extending into the mold cavity are pressed between the mold forming surfaces, and the means effecting movement of said gaskets is acquired through the movement of said mold forming surfaces.
Claim 9
Dependent Claim
30 words
The invention of claim 7 wherein the gaskets extending into the mold cavity from each side plate lay upon each other as they are pressed between the mold forming surfaces.
Claim 10
Dependent Claim
28 words
The invention of claim 7 wherein the gaskets extending into the mold cavity from each side plate are juxtaposed as they are pressed between the mold forming surfaces.
Claim 11
Dependent Claim
34 words
The invention of claim 6 wherein the gaskets forming the edge sealing means chemically bond with the polymeragenic composition being molded within the casting machine thereby forming an integral border with the cast composition.
Claim 12
Dependent Claim
34 words
The invention of claim 6 wherein the gaskets forming the edge sealing means mechanically bond with the polymeragenic composition being molded within the casting machine thereby forming an integral border with the cast composition.
Claim 13
Dependent Claim
20 words
The invention of claim 1 wherein said support means includes at least one cross bracing connecting between the side plates.
Claim 14
Dependent Claim
35 words
The invention of claim 12 wherein the cross bracing is adjustable providing for its extension or retraction and thereby regulating the distance between the side plates and resultively defining the width of the mold cavity.
Claim 15
Dependent Claim
61 words
The invention of claim 1 wherein said support means includes a pair of casters connecting to each plate, at least one of each casters being mounted at the edge of said side plate, the rotatable portion of each caster being disposed for contact with and rotation upon a movable mold forming surface therein stabilizing said plate with respect to said surface.
Claim 16
Dependent Claim
34 words
The invention of claim 14 wherein the mounting of the casters to a side plate is adjustable thereby providing for adjustment in the stabilization of the plate with respect to a mold forming surface.
Claim 17
Dependent Claim
33 words
The invention of claim 1 including adjustment means associated with each side plate and upon functioning providing for a variation in the spacing intermediate the plate edges contiguous with the mold forming surfaces.
Claim 18
Dependent Claim
129 words
In combination with a continuous polymer casting machine having a mold cavity intermediate a pair of movable mold forming surfaces, a feed inlet reservoir for introducing a polymeragenic composition into the mold cavity of said casting machine, said inlet reservoir comprising at least two side plates for use in retaining said composition proximate the inlet opening of the mold cavity and directing its entrance therein, the edges of said plates in contiguity with the mold forming surfaces being contoured to conform with the shape of said surfaces, movable sealing means operatively associated with the side plate edges and the contiguous mold forming surfaces to retard leakage of said composition from the reservoir, and support means stabilizing said plates with respect to the mold forming surfaces of the casting machine.
Claim 19
Dependent Claim
129 words
In combination with a continuous polymer casting machine having a mold cavity intermediate a pair of movable mold forming surfaces, a feed inlet reservoir for introducing a polymeragenic composition into the mold cavity of said casting machine, said inlet reservoir comprising at least two side plates for use in retaining said composition proximate the inlet opening of the mold cavity and directing its entrance therein, the edges of said plates in contiguity with the mold forming surfaces being contoured to conform with the shape of said surfaces, movable sealing means operatively associated with the side plate edges and the contiguous mold forming surfaces to retard leakage of said composition from the reservoir, and support means stabilizing said plates with respect to the mold forming surfaces of the casting machine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |