US3969059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous rotary apparatus for blow-molding plastic hollow bodies
Assignee: Solvay SA
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Filing: 1974-06-25
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Granted: 1976-07-13
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Expires: 1994-06-25
Abstract
Abstract The invention concerns a continuous rotary apparatus for blow-moulding plastic hollow bodies in which the height of the moulds may be easily changed and which permits a minimum of waste plastic material. This apparatus comprises a fixed framework equipped with a fixed track which carries a plurality of independent moulding units travelling over the track and equipped with a driving device and a device for driving the moulding units which comprises a rotary platen mounted on a shaft which can be moved relative to the fixed framework and is equipped with equidistant slots which act on the driving devices of the moulding units. When the height of the moulds of the moulding units are changed the shaft carrying the rotary platen is displaced relatively to the fixed framework in such a manner that when a mould is in position to be fed with a portion of a continuous hot parison, the preceding mould still fed with a portion of parison is temporarily in contact with it.
Inventors
- 👤 Edmond Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:04
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/28; B29C49/30; B29C49/36; B29C49/42; B29C49/58; B29C49/60; B29C49/48; B29C49/48185; B29C49/56; B29C49/5608
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
105 words
In a continuous rotary apparatus for blow-moulding plastic hollow bodies, including a fixed framework, moulds, means of opening and closing the moulds and means for introducing a blowing fluid, the improvement comprising: a. a fixed track which is integral with the framework; b. a plurality of independent moveable moulding units which carry the moulds, and travel successively over the track; and c. a device for driving the moulding units, which includes a rotary platen mounted on a shaft, said shaft being moveable relative to the fixed framework and said platen being equipped with equidistant slots which act on the drive devices of the moulding units.
Claim 2
Dependent Claim
105 words
In a continuous rotary apparatus for blow-moulding plastic hollow bodies, including a fixed framework, moulds, means of opening and closing the moulds and means for introducing a blowing fluid, the improvement comprising: a. a fixed track which is integral with the framework; b. a plurality of independent moveable moulding units which carry the moulds, and travel successively over the track; and c. a device for driving the moulding units, which includes a rotary platen mounted on a shaft, said shaft being moveable relative to the fixed framework and said platen being equipped with equidistant slots which act on the drive devices of the moulding units.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1, characterized in that the track is of such shape that the moulding units execute a closed trajectory of which at least a portion is circular.
Claim 4
Dependent Claim
30 words
Apparatus according to claim 1, characterized in that the track is of such shape that the moulding units execute a closed trajectory of which at least a portion is rectilinear.
Claim 5
Dependent Claim
24 words
Apparatus according to claim 1, characterized in that the track consists of a fixed platen possessing at least one groove running along its periphery.
Claim 6
Dependent Claim
12 words
Apparatus according to claim 4, characterized in that the platen is circular.
Claim 7
Dependent Claim
49 words
Apparatus according to claim 4, characterized in that each moulding unit comprises a carriage on which are arranged a fixed half-mould and a moveable half-mould which is hinged to the fixed half-mould by a hinge system, the carraige straddling the edge of the fixed platen which constitutes the track.
Claim 8
Dependent Claim
31 words
Apparatus according to claim 6, characterized in that each carriage is furthermore equipped with retaining means, such as rollers which engage in the grooves with which the fixed platen is provided.
Claim 9
Dependent Claim
38 words
Apparatus according to claim 1, characterized in that the moveable shaft which rotates the device which drives the moulding units is mounted on a moveable component which travels along a slide which is integral with the fixed framework.
Claim 10
Dependent Claim
16 words
Apparatus according to claim 8, characterized in that the slide is hinged to the fixed framework.
Claim 11
Dependent Claim
34 words
Apparatus according to claim 8, characterized in that the slide is provided with means which allow it to be moved along a direction at right-angles to the direction of travel of the moveable component.
Claim 12
Dependent Claim
179 words
In a continuous rotary apparatus for blow-moulding plastic hollow bodies, including a fixed framework, moulds, means of opening and closing the moulds and means for introducing a blowing fluid, the improvement comprising: a. a fixed track which is integral with the framework and which provides a closed loop path; b. a plurality of independent moveable moulding units which carry the moulds and are mounted to travel successively on the track and along the closed loop path; c. means for driving the moulding units along the closed loop path and which includes a rotary platen mounted on a shaft which can be moved relative to the fixed framework and the closed loop path, said platen having equidistant slots which act on and move the drive devices of the moulding units; and d. means operative on said shaft for moving the location of the platen shaft whereby when the platen shaft is moved different portions of the slots act on the drive devices thereby to vary the distance between moulds along at least a particular portion of the closed loop path.
Claim 13
Dependent Claim
179 words
In a continuous rotary apparatus for blow-moulding plastic hollow bodies, including a fixed framework, moulds, means of opening and closing the moulds and means for introducing a blowing fluid, the improvement comprising: a. a fixed track which is integral with the framework and which provides a closed loop path; b. a plurality of independent moveable moulding units which carry the moulds and are mounted to travel successively on the track and along the closed loop path; c. means for driving the moulding units along the closed loop path and which includes a rotary platen mounted on a shaft which can be moved relative to the fixed framework and the closed loop path, said platen having equidistant slots which act on and move the drive devices of the moulding units; and d. means operative on said shaft for moving the location of the platen shaft whereby when the platen shaft is moved different portions of the slots act on the drive devices thereby to vary the distance between moulds along at least a particular portion of the closed loop path.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |