Patent US3685938A successfully refreshed from Google Patents.
US3685938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming hollow bodies
Assignee: Saint Gobain SEVA SA
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Filing: 1970-08-07
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Granted: 1972-08-22
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Expires: 1990-08-07
Abstract
Abstract A machine for blow molding hollow bodies such as bottles from extruded tubular plastic material includes a plurality of molds which are guided over a closed path including a straight portion coaxial with the extruder by means of a first follower constrained to follow a closed loop path and second and third followers engaging with guide surfaces which extend over fractions of a closed loop path.
Inventors
- 👤 Serge Lagoutte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:55
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/28; B29C49/30; B29C49/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
Apparatus for blow molding hollow articles from tubular plastic material extruded along an axis, said apparatus comprising a plurality of molds, a first cam having a closed profile, two cams having open profiles, three cam followers coupled to each of said molds, each of said followers being engageable with a separate one of said cams, a drive shaft, and, for each of said molds, an arm fixed to said shaft and a rod pivotally connecting said arm to the follower engaging said closed profile cam.
Claim 2
Dependent Claim
85 words
Apparatus for blow molding hollow articles from tubular plastic material extruded along an axis, said apparatus comprising a plurality of molds, a first cam having a closed profile, two cams having open profiles, three cam followers coupled to each of said molds, each of said followers being engageable with a separate one of said cams, a drive shaft, and, for each of said molds, an arm fixed to said shaft and a rod pivotally connecting said arm to the follower engaging said closed profile cam.
Claim 3
Dependent Claim
20 words
Apparatus according to claim 1 including means to adjust the point of coupling of said rod lengthwise of said arm.
Claim 4
Dependent Claim
37 words
Apparatus according to claim 1 wherein the spacing of said follower engaging said closed profile cam from said followers engaging said open profile cams is of the same order of magnitude as the length of said arm.
Claim 5
Dependent Claim
133 words
Apparatus for blow molding hollow articles from tubular material extruded along an axis, said apparatus comprising a stationary face cam having a closed profile including a straight portion parallel to said axis, a plurality of stationary face cams having open profiles each including a straight portion parallel to said first-named straight portion, and a plurality of mold cradles, said machine further comprising for each of said cradles a first follower engaging said closed profile cam, auxiliary followers engageable each with a separate one of said open profile cams, and means supporting said cradle and supporting said followers for rotation about axes fixed with respect to each other and to said cradle, said machine further comprising means to drive said first followers through the closed path defined by said cam having a closed profile.
Claim 6
Dependent Claim
133 words
Apparatus for blow molding hollow articles from tubular material extruded along an axis, said apparatus comprising a stationary face cam having a closed profile including a straight portion parallel to said axis, a plurality of stationary face cams having open profiles each including a straight portion parallel to said first-named straight portion, and a plurality of mold cradles, said machine further comprising for each of said cradles a first follower engaging said closed profile cam, auxiliary followers engageable each with a separate one of said open profile cams, and means supporting said cradle and supporting said followers for rotation about axes fixed with respect to each other and to said cradle, said machine further comprising means to drive said first followers through the closed path defined by said cam having a closed profile.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |