Patent US3724802A successfully refreshed from Google Patents.
US3724802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastics moulding presses
Assignee: Olivetti SpA
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Filing: 1971-09-03
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Granted: 1973-04-03
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Expires: 1991-09-03
Abstract
Abstract A moulding press has a series of hollow guide bolts, each connected at one end to a plate of the press and having a head defining the maximum distance of another plate that slides on the bolt. A pin is contained slidably in the bolt and has transverse spikes protruding through longitudinal slots in the wall of the bolt. The spikes engage certain plates of the press to define their maximum movements.
Inventors
- 👤 G Veneria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:00
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/2602; B29C2045/2604; Y; Y10; Y10S; Y10S425/00; Y10S425/051
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A moulding press having a plurality of plates and means to guide the plates for movement relatively to each other, such guide means including a guide bolt extending between at least two plates, with the improvement that the bolt is hollow and contains a sliding pin, the pin having at least two transverse elements protruding through slots in the bolt, each element being engageable with a plate to limit the movement of that plate relatively to another plate.
Claim 2
Dependent Claim
78 words
A moulding press having a plurality of plates and means to guide the plates for movement relatively to each other, such guide means including a guide bolt extending between at least two plates, with the improvement that the bolt is hollow and contains a sliding pin, the pin having at least two transverse elements protruding through slots in the bolt, each element being engageable with a plate to limit the movement of that plate relatively to another plate.
Claim 3
Dependent Claim
132 words
The press of claim 1 having a first plate tO which one end of the bolt is connected, the bolt having a head on its free end, and a second plate and a third plate that are slidable on the bolt, the third plate being adapted to engage the head of the bolt to define the maximum gap between the first plate and the third plate, and in which the pin has a first protruding element that is fixed to the second plate and a second such element that is unconnected to any plate but is adapted to engage a seat in the third plate during opening of the press, thereby to cause the pin and the second plate to be moved together with the third plate away from the first plate.
Claim 4
Dependent Claim
17 words
The press of claim 2, in which the first plate is a fixed plate of the press.
Claim 5
Dependent Claim
91 words
The press of claim 2, in which the third plate carries one member of a die of the press, and including a fourth plate carrying a second die member, the bolt having a cam at a point on its length and the fourth plate carrying a hook that engages a tooth on the third plate, the cam being located in the path of movement of the hook and being adapted, when the hook engages the cam, to disengage the hook from the tooth, so separating the third plate and fourth plate.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |