Patent US3784342A successfully refreshed from Google Patents.
US3784342A
Expired / Lapsed
US
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Apparatus for deep drawings containers of thermoplastic film material
Assignee: TEDECO AG
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Filing: 1972-08-16
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Granted: 1974-01-08
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Expires: 1992-08-16
Abstract
Abstract An apparatus of forming containers of thermoplastic film material, said containers having back-cut portions, said apparatus comprising the means of maintaining the film material preheated into the plasticized range stressed over the opening of a mold means and of urging it into said mold means after a mechanical prestretching by a pneumatic pressurizing against the walls of said mold means until the solidification thereof, the margin of the molded article being severed to the desired dimension and said mold means divided in longitudinal direction being opened for the removal thereof, said apparatus being characterized by the fact that said mold means is opened only within the region having the back-cut portions and a region at least uninterrupted on its circumference being moved along the molded article toward a cutting plate for severing.
Inventors
- 👤 H Merklinghaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:49
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/34; B26; B26F; B26F1/00; B26F1/38; B26F1/40; B26F1/44; B26F2001/4427; Y; Y10; Y10S; Y10S425/00; Y10S425/058
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
318 words
Apparatus for the production of containers with restricted throat portions, comprising in combination: die means having integral fixed vertical peripheral wall means with continuous peripheral knife means formed at the upper edge thereof, a movable bottom wall inwardly of said wall means to form a cavity for receiving sheet material therein to be formed into a container; mold element means at the top of said die means, said mold element means being radially movable inwardly and outwardly relative to said die means, said mold element means being at its radially inward position inwardly of said continuous peripheral knife means forming a peripherally inwardly offset continuation of said wall means when sheet material is being formed into a container, said mold element means being moved to it radially outward position clear of said continuous peripheral knife means and the vertical walls after the container is formed; punch means positioned in registry with said continuous peripheral knife means and engageable with the outwardly directed periphery of the sheet material during forming of the container and cooperable with said mold element means when in the inward position to hold the sheet material in place during forming the container, and pressure forming means associated with said punch means for urging the sheet material into firm contact with said side wall means and bottom wall of said die means and into contact with said mold element means thereby forming the container with a restricted throat portion; said die means with its continuous peripheral knife means being movable toward said punch means when said mold element means are moved to the outward position for cutting the outwardly directed periphery of the sheet material and forming a flange on the formed container outwardly of the restricted throat portion after said container is formed, said bottom wall being movable relating to said side wall means to allow the container to be removed from the die means.
Claim 2
Dependent Claim
318 words
Apparatus for the production of containers with restricted throat portions, comprising in combination: die means having integral fixed vertical peripheral wall means with continuous peripheral knife means formed at the upper edge thereof, a movable bottom wall inwardly of said wall means to form a cavity for receiving sheet material therein to be formed into a container; mold element means at the top of said die means, said mold element means being radially movable inwardly and outwardly relative to said die means, said mold element means being at its radially inward position inwardly of said continuous peripheral knife means forming a peripherally inwardly offset continuation of said wall means when sheet material is being formed into a container, said mold element means being moved to it radially outward position clear of said continuous peripheral knife means and the vertical walls after the container is formed; punch means positioned in registry with said continuous peripheral knife means and engageable with the outwardly directed periphery of the sheet material during forming of the container and cooperable with said mold element means when in the inward position to hold the sheet material in place during forming the container, and pressure forming means associated with said punch means for urging the sheet material into firm contact with said side wall means and bottom wall of said die means and into contact with said mold element means thereby forming the container with a restricted throat portion; said die means with its continuous peripheral knife means being movable toward said punch means when said mold element means are moved to the outward position for cutting the outwardly directed periphery of the sheet material and forming a flange on the formed container outwardly of the restricted throat portion after said container is formed, said bottom wall being movable relating to said side wall means to allow the container to be removed from the die means.
Claim 3
Dependent Claim
48 words
The apparatus for the production of containers according to claim 1, wherein said mold element means is formed of a two pieced split collar arrangement which is moved in diametrically opposed directions to remove the mold element from between said punch means and said continuous peripheral knife means.
Claim 4
Dependent Claim
57 words
The apparatus for the production of containers according to claim 1, further including an annular axially shiftable depressor member positioned about said punch and in spaced alignment from said continuous peripheral knife means firmly to hold the outwardly directed periphery of the plastic material being formed into a container between said die means and said punch means.
Claim 5
Dependent Claim
82 words
The apparatus for the production of containers according to claim 1, wherein said die means is supported on a movable platen, said platen being movable relative to the movable bottom wall of said die means, adjustable guide means secured to said movable platen and extending upwardly therefrom for supporting said mold element means, and actuator means secured to said adjustable guide members and connected to said mold element means for actuation radially inwardly and outwardly for movement of said mold element means.
Claim 6
Dependent Claim
56 words
The apparatus for the production of containers according to claim 1, wherein said pressure forming means includes means adapted to be in fluid communication with a supply of air pressure, said air pressure assisting said forming means for ultimately urging the plastic material in firm contact with the side and bottom walls of said die means.
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |