Patent US3679803A successfully refreshed from Google Patents.
US3679803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaping press, specifically for articles made of plastic
Assignee: Lebocey Industrie SA
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Filing: 1969-08-25
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Granted: 1972-07-25
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Expires: 1989-08-25
Abstract
Abstract The invention relates to a shaping press for articles made of plastic, comprising two members that act as a shaping enclosure, inside which the material to be shaped is held at an appreciably uniform pressure strength, this strength being independent of the means operating the moving of one of the mobile members of the shaping enclosure.
Inventors
- 👤 Jacques Palencher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:33
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/38; B29C43/00; B29C43/32; B29C51/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A molding apparatus comprising in combination: a. first and second chamber-forming elements engageable to define a chamber, one of said chamber elements including a sleeve and resilient mounting means for urging said sleeve against the other chamber-forming element to clamp a sheet of material to be heat-shaped between said two elements; b. heat-shaping means coacting in said chamber; c. cutting means telescopically disposed within said resiliently mounted sleeve for cutting out a portion from said sheet of material; d. main jack means for closing the first and second chamberforming elements; and e. counteracting jack means disposed for action in opposition to said main jacks means and for urging said first and second chamber-forming eleMents toward an open position and for applying a counteracting force in opposition to the main jack means when the resiliently mounted sleeve exerts a squeezing pressure on the material of the sheet clamped between said chamber-forming elements; g. means for moving the cutting means through the material to be heat-shaped.
Claim 2
Dependent Claim
164 words
A molding apparatus comprising in combination: a. first and second chamber-forming elements engageable to define a chamber, one of said chamber elements including a sleeve and resilient mounting means for urging said sleeve against the other chamber-forming element to clamp a sheet of material to be heat-shaped between said two elements; b. heat-shaping means coacting in said chamber; c. cutting means telescopically disposed within said resiliently mounted sleeve for cutting out a portion from said sheet of material; d. main jack means for closing the first and second chamberforming elements; and e. counteracting jack means disposed for action in opposition to said main jacks means and for urging said first and second chamber-forming eleMents toward an open position and for applying a counteracting force in opposition to the main jack means when the resiliently mounted sleeve exerts a squeezing pressure on the material of the sheet clamped between said chamber-forming elements; g. means for moving the cutting means through the material to be heat-shaped.
Claim 3
Dependent Claim
51 words
A molding apparatus in accordance with claim 1 wherein said chamber-forming elements are respectively mounted on spaced platens, at least one of said platens carrying the counteracting jack means which are adapted to engage the other platen to restrict movement in a closing direction during the course of the forming operation.
Claim 4
Dependent Claim
55 words
A molding apparatus in accordance with claim 2 wherein one of said chamber elements is fixed on its platen and the opposing platen is mounted on and movable along rods, said movable platen also including rods aligned with opposing rods actuated by said counteracting jack means provided on the platen carrying said fixed chamber-forming element.
Claim 5
Dependent Claim
19 words
A molding apparatus in accordance with claim 1 wherein the resilient mounting means comprises a plurality of coil springs.
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |