US3914103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abstract having product ejection means for forming plastic
Assignee: Formex Manufacturing Inc
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Filing: 1974-09-23
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Granted: 1975-10-21
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Expires: 1994-09-23
Abstract
Abstract Improvements in the apparatus for transferring and positioning thermoplastic sheets and for ejecting molded products formed therefrom in a vacuum-forming machine are disclosed. The vacuumforming machine has a loading-unloading station, heating stations and a molding station and a plurality of open frameworks to support the thermoplastic sheets and transfer them between stations. The open frameworks are formed of bar members which support clamping assemblies that support the edges of the thermoplastic sheets. The open frameworks are provided with an ejection mechanism for discharge of molded, hollow enclosure products which comprises slidable bracket means securing at least one of the bar members to its vicinal bar members with actuation means whereby the frameworks can be expanded to facilitate the discharge of molded product therefrom.
Inventors
- 👤 Donald E Dean
- 👤 Jr John Alesi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:43
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/261; B29C51/262; B29C51/14; B29L; B29L2009/00; B29L2009/001; Y; Y10; Y10S; Y10S425/00; Y10S425/048
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
In a sheet molding machine having transfer means including at least one open frameworks formed of frame bar members with sheet edge clamping means carried on said bar members for moving sheets of thermoplastic between opposed die faces, for supporting said sheets against said die faces during the molding thereof into a formed product, and for transferring said formed product from said die faces, the improvement of formed product ejection means comprising bracket members carried by at least one of said bar members and slidably engaged on a vicinal bar member with actuation means to effect the reciprocal movement thereof whereby said frameworks may be expanded and contracted to facilitate the removal of formed product therefrom.
Claim 2
Dependent Claim
116 words
In a sheet molding machine having transfer means including at least one open frameworks formed of frame bar members with sheet edge clamping means carried on said bar members for moving sheets of thermoplastic between opposed die faces, for supporting said sheets against said die faces during the molding thereof into a formed product, and for transferring said formed product from said die faces, the improvement of formed product ejection means comprising bracket members carried by at least one of said bar members and slidably engaged on a vicinal bar member with actuation means to effect the reciprocal movement thereof whereby said frameworks may be expanded and contracted to facilitate the removal of formed product therefrom.
Claim 3
Dependent Claim
40 words
The machine of claim 1 wherein said frameworks is rectangular and defined by a pair of longitudinal bar members and a pair of cross bar members with said bracket members carried on both ends of one of said cross members.
Claim 4
Dependent Claim
25 words
The machine of claim 2 wherein said frameworks is formed with said bracket members carried at both ends of one of said longitudinal bar members.
Claim 5
Dependent Claim
45 words
The machine of claim 2 wherein said open frameworks is carried on parallel main frame side arms with said longitudinal bar members mounted therebetween and said pair of cross bar members are carried on said longitudinal bar members intermediate of said main frame side arms.
Claim 6
Dependent Claim
87 words
The machine of claim 4 wherein each of said cross bar members bears bracket members slidably mounted on said longitudinal bar members with lock means on the bracket members carried by one of said cross bar members to fixedly secure said one cross bar member to said longitudinal bar member and with said actuation means fixedly carried on said longitudinal bar member adjacent and mechanically connected to the bracket member on the other of said cross bar members and operative to reciprocate said other cross bar member.
Claim 7
Dependent Claim
76 words
The machine of claim 4 wherein one of said longitudinal bar members carries bracket members at each end thereof slidably mounted on said main frame side arms with actuation means carried on said main frame side arms adjacent and mechanically coupled to said bracket members carried by said longitudinal bar members and wherein said cross bar members are telescopingly mounted in said frame whereby said longitudinal member may be reciprocated on said main frame side arms.
Claim 8
Dependent Claim
54 words
The machine of claim 1 wherein said actuation means comprises a reciprocating piston and Cylinder assemblies, each having one end thereof secured to said sliding bracket members and the other end thereof carried by mounting bracket members with lock means whereby said mounting bracket members can be fixedly secured to its supporting frame member.
Claim 9
Dependent Claim
31 words
The machine of claim 7 wherein said piston and cylinder assemblies are interconnected to a common source of actuating fluid pressure whereby said assemblies can be extended and contracted in synchronism.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |